[{"year":"2024","citation":{"ama":"Schwabe T, Rüsing M, Staal N, et al. <i>Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology </i>. Zenodo; 2024. doi:<a href=\"https://doi.org/10.5281/zenodo.15124929\">10.5281/zenodo.15124929</a>","chicago":"Schwabe, Tobias, Michael Rüsing, Niels Staal, Max Schwengelbeck, Laura Bollmers, Laura Padberg, Christof Eigner, Christine Silberhorn, and J. Christoph Scheytt. <i>Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology </i>. Zenodo, 2024. <a href=\"https://doi.org/10.5281/zenodo.15124929\">https://doi.org/10.5281/zenodo.15124929</a>.","ieee":"T. Schwabe <i>et al.</i>, <i>Quantum photonic systems in CMOS compatible silicon nitride technology </i>. Zenodo, 2024.","mla":"Schwabe, Tobias, et al. <i>Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology </i>. Zenodo, 2024, doi:<a href=\"https://doi.org/10.5281/zenodo.15124929\">10.5281/zenodo.15124929</a>.","short":"T. Schwabe, M. Rüsing, N. Staal, M. Schwengelbeck, L. Bollmers, L. Padberg, C. Eigner, C. Silberhorn, J.C. Scheytt, Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology , Zenodo, 2024.","bibtex":"@book{Schwabe_Rüsing_Staal_Schwengelbeck_Bollmers_Padberg_Eigner_Silberhorn_Scheytt_2024, title={Quantum photonic systems in CMOS compatible silicon nitride technology }, DOI={<a href=\"https://doi.org/10.5281/zenodo.15124929\">10.5281/zenodo.15124929</a>}, publisher={Zenodo}, author={Schwabe, Tobias and Rüsing, Michael and Staal, Niels and Schwengelbeck, Max and Bollmers, Laura and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Scheytt, J. Christoph}, year={2024} }","apa":"Schwabe, T., Rüsing, M., Staal, N., Schwengelbeck, M., Bollmers, L., Padberg, L., Eigner, C., Silberhorn, C., &#38; Scheytt, J. C. (2024). <i>Quantum photonic systems in CMOS compatible silicon nitride technology </i>. Zenodo. <a href=\"https://doi.org/10.5281/zenodo.15124929\">https://doi.org/10.5281/zenodo.15124929</a>"},"title":"Quantum photonic systems in CMOS compatible silicon nitride technology ","doi":"10.5281/zenodo.15124929","publisher":"Zenodo","date_updated":"2025-04-03T12:34:56Z","author":[{"last_name":"Schwabe","id":"39217","full_name":"Schwabe, Tobias","first_name":"Tobias"},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501","first_name":"Michael"},{"last_name":"Staal","full_name":"Staal, Niels","first_name":"Niels"},{"last_name":"Schwengelbeck","full_name":"Schwengelbeck, Max","first_name":"Max"},{"full_name":"Bollmers, Laura","id":"61375","last_name":"Bollmers","first_name":"Laura"},{"first_name":"Laura","last_name":"Padberg","full_name":"Padberg, Laura","id":"40300"},{"id":"13244","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","first_name":"Christof"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"},{"orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","id":"37144","full_name":"Scheytt, J. Christoph","first_name":"J. Christoph"}],"date_created":"2025-04-02T11:24:23Z","status":"public","type":"misc","language":[{"iso":"eng"}],"_id":"59259","department":[{"_id":"288"},{"_id":"15"},{"_id":"623"}],"user_id":"22501"},{"intvolume":"        23","page":"795-803","citation":{"ama":"Acevedo-Salas U, Croes B, Zhang Y, et al. Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls. <i>Nano Letters</i>. 2023;23(3):795-803. doi:<a href=\"https://doi.org/10.1021/acs.nanolett.2c03579\">10.1021/acs.nanolett.2c03579</a>","ieee":"U. Acevedo-Salas <i>et al.</i>, “Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls,” <i>Nano Letters</i>, vol. 23, no. 3, pp. 795–803, 2023, doi: <a href=\"https://doi.org/10.1021/acs.nanolett.2c03579\">10.1021/acs.nanolett.2c03579</a>.","chicago":"Acevedo-Salas, Ulises, Boris Croes, Yide Zhang, Olivier Cregut, Kokou Dodzi Dorkenoo, Benjamin Kirbus, Ekta Singh, et al. “Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls.” <i>Nano Letters</i> 23, no. 3 (2023): 795–803. <a href=\"https://doi.org/10.1021/acs.nanolett.2c03579\">https://doi.org/10.1021/acs.nanolett.2c03579</a>.","bibtex":"@article{Acevedo-Salas_Croes_Zhang_Cregut_Dorkenoo_Kirbus_Singh_Beccard_Rüsing_Eng_et al._2023, title={Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls}, volume={23}, DOI={<a href=\"https://doi.org/10.1021/acs.nanolett.2c03579\">10.1021/acs.nanolett.2c03579</a>}, number={3}, journal={Nano Letters}, publisher={American Chemical Society (ACS)}, author={Acevedo-Salas, Ulises and Croes, Boris and Zhang, Yide and Cregut, Olivier and Dorkenoo, Kokou Dodzi and Kirbus, Benjamin and Singh, Ekta and Beccard, Henrik and Rüsing, Michael and Eng, Lukas M. and et al.}, year={2023}, pages={795–803} }","short":"U. Acevedo-Salas, B. Croes, Y. Zhang, O. Cregut, K.D. Dorkenoo, B. Kirbus, E. Singh, H. Beccard, M. Rüsing, L.M. Eng, R. Hertel, E.A. Eliseev, A.N. Morozovska, S. Cherifi-Hertel, Nano Letters 23 (2023) 795–803.","mla":"Acevedo-Salas, Ulises, et al. “Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls.” <i>Nano Letters</i>, vol. 23, no. 3, American Chemical Society (ACS), 2023, pp. 795–803, doi:<a href=\"https://doi.org/10.1021/acs.nanolett.2c03579\">10.1021/acs.nanolett.2c03579</a>.","apa":"Acevedo-Salas, U., Croes, B., Zhang, Y., Cregut, O., Dorkenoo, K. D., Kirbus, B., Singh, E., Beccard, H., Rüsing, M., Eng, L. M., Hertel, R., Eliseev, E. A., Morozovska, A. N., &#38; Cherifi-Hertel, S. (2023). Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls. <i>Nano Letters</i>, <i>23</i>(3), 795–803. <a href=\"https://doi.org/10.1021/acs.nanolett.2c03579\">https://doi.org/10.1021/acs.nanolett.2c03579</a>"},"publication_identifier":{"issn":["1530-6984","1530-6992"]},"publication_status":"published","doi":"10.1021/acs.nanolett.2c03579","date_updated":"2023-10-11T09:06:31Z","volume":23,"author":[{"last_name":"Acevedo-Salas","full_name":"Acevedo-Salas, Ulises","first_name":"Ulises"},{"last_name":"Croes","full_name":"Croes, Boris","first_name":"Boris"},{"full_name":"Zhang, Yide","last_name":"Zhang","first_name":"Yide"},{"first_name":"Olivier","full_name":"Cregut, Olivier","last_name":"Cregut"},{"full_name":"Dorkenoo, Kokou Dodzi","last_name":"Dorkenoo","first_name":"Kokou Dodzi"},{"last_name":"Kirbus","full_name":"Kirbus, Benjamin","first_name":"Benjamin"},{"first_name":"Ekta","full_name":"Singh, Ekta","last_name":"Singh"},{"last_name":"Beccard","full_name":"Beccard, Henrik","first_name":"Henrik"},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","last_name":"Rüsing","orcid":"0000-0003-4682-4577"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"full_name":"Hertel, Riccardo","last_name":"Hertel","first_name":"Riccardo"},{"full_name":"Eliseev, Eugene A.","last_name":"Eliseev","first_name":"Eugene A."},{"full_name":"Morozovska, Anna N.","last_name":"Morozovska","first_name":"Anna N."},{"first_name":"Salia","full_name":"Cherifi-Hertel, Salia","last_name":"Cherifi-Hertel"}],"status":"public","type":"journal_article","article_type":"original","extern":"1","_id":"47992","user_id":"22501","year":"2023","quality_controlled":"1","issue":"3","title":"Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain Walls","publisher":"American Chemical Society (ACS)","date_created":"2023-10-11T09:06:05Z","abstract":[{"lang":"eng","text":"Ferroelectric domain boundaries are quasi-two-dimensional functional interfaces with high prospects for nanoelectronic applications. Despite their reduced dimensionality, they can exhibit complex non-Ising polarization configurations and unexpected physical properties. Here, the impact of the three-dimensional (3D) curvature on the polarization profile of nominally uncharged 180° domain walls in LiNbO3 is studied using second-harmonic generation microscopy and 3D polarimetry analysis. Correlations between the domain-wall curvature and the variation of its internal polarization unfold in the form of modulations of the Néel-like character, which we attribute to the flexoelectric effect. While the Néel-like character originates mainly from the tilting of the domain wall, the internal polarization adjusts its orientation due to the synergetic upshot of dipolar and monopolar bound charges and their variation with the 3D curvature. Our results show that curved interfaces in solid crystals may offer a rich playground for tailoring nanoscale polar states."}],"publication":"Nano Letters","keyword":["Mechanical Engineering","Condensed Matter Physics","General Materials Science","General Chemistry","Bioengineering"],"language":[{"iso":"eng"}]},{"doi":"10.1103/physrevmaterials.7.024420","title":"Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress","author":[{"first_name":"Ekta","full_name":"Singh, Ekta","last_name":"Singh"},{"first_name":"Mike N.","full_name":"Pionteck, Mike N.","last_name":"Pionteck"},{"first_name":"Sven","last_name":"Reitzig","full_name":"Reitzig, Sven"},{"full_name":"Lange, Michael","last_name":"Lange","first_name":"Michael"},{"full_name":"Rüsing, Michael","id":"22501","last_name":"Rüsing","orcid":"0000-0003-4682-4577","first_name":"Michael"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"}],"date_created":"2023-10-11T09:06:56Z","volume":7,"publisher":"American Physical Society (APS)","date_updated":"2023-10-11T09:08:16Z","citation":{"ama":"Singh E, Pionteck MN, Reitzig S, et al. Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress. <i>Physical Review Materials</i>. 2023;7(2). doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>","chicago":"Singh, Ekta, Mike N. Pionteck, Sven Reitzig, Michael Lange, Michael Rüsing, Lukas M. Eng, and Simone Sanna. “Vibrational Properties of LiNbO3 and LiTaO3 under Uniaxial Stress.” <i>Physical Review Materials</i> 7, no. 2 (2023). <a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">https://doi.org/10.1103/physrevmaterials.7.024420</a>.","ieee":"E. Singh <i>et al.</i>, “Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress,” <i>Physical Review Materials</i>, vol. 7, no. 2, Art. no. 024420, 2023, doi: <a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>.","apa":"Singh, E., Pionteck, M. N., Reitzig, S., Lange, M., Rüsing, M., Eng, L. M., &#38; Sanna, S. (2023). Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress. <i>Physical Review Materials</i>, <i>7</i>(2), Article 024420. <a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">https://doi.org/10.1103/physrevmaterials.7.024420</a>","short":"E. Singh, M.N. Pionteck, S. Reitzig, M. Lange, M. Rüsing, L.M. Eng, S. Sanna, Physical Review Materials 7 (2023).","mla":"Singh, Ekta, et al. “Vibrational Properties of LiNbO3 and LiTaO3 under Uniaxial Stress.” <i>Physical Review Materials</i>, vol. 7, no. 2, 024420, American Physical Society (APS), 2023, doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>.","bibtex":"@article{Singh_Pionteck_Reitzig_Lange_Rüsing_Eng_Sanna_2023, title={Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/physrevmaterials.7.024420\">10.1103/physrevmaterials.7.024420</a>}, number={2024420}, journal={Physical Review Materials}, publisher={American Physical Society (APS)}, author={Singh, Ekta and Pionteck, Mike N. and Reitzig, Sven and Lange, Michael and Rüsing, Michael and Eng, Lukas M. and Sanna, Simone}, year={2023} }"},"intvolume":"         7","year":"2023","issue":"2","publication_status":"published","publication_identifier":{"issn":["2475-9953"]},"quality_controlled":"1","extern":"1","language":[{"iso":"eng"}],"article_type":"original","article_number":"024420","keyword":["Physics and Astronomy (miscellaneous)","General Materials Science"],"user_id":"22501","_id":"47993","status":"public","abstract":[{"text":"Structural strain severely impacts material properties, such as the linear and nonlinear optical response. Moreover, strain plays a key role, e.g., in the physics of ferroelectrics and, in particular, of their domain walls. μ-Raman spectroscopy is a well-suited technique for the investigation of such strain effects as it allows to measure the lattice dynamics locally. However, quantifying and reconstructing strain fields from Raman maps requires knowledge on the strain dependence of phonon frequencies. In this paper, we have analyzed both theoretically and experimentally the phonon frequencies in the widely used ferroelectrics lithium niobate and lithium tantalate as a function of uniaxial strain via density functional theory and μ-Raman spectroscopy. Overall, we find a good agreement between our ab initio models and the experimental data performed with a stress cell. The majority of phonons show an increase in frequency under compressive strain, whereas the opposite is observed for tensile strains. Moreover, for E-type phonons, we observe the lifting of degeneracy already at moderate strain fields (i.e., at ±0.2%) along the x and y directions. This paper, hence, allows for the systematic analysis of three-dimensional strains in modern-type bulk and thin-film devices assembled from lithium niobate and tantalate.","lang":"eng"}],"type":"journal_article","publication":"Physical Review Materials"},{"title":"Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach","publisher":"AIP Publishing","date_created":"2023-10-11T09:09:00Z","year":"2023","quality_controlled":"1","issue":"12","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"abstract":[{"text":"Coherent nonlinear optical μ-spectroscopy is a frequently used tool in modern material science as it is sensitive to many different local observables, which comprise, among others, crystal symmetry and vibrational properties. The richness in information, however, may come with challenges in data interpretation, as one has to disentangle the many different effects like multiple reflections, phase jumps at interfaces, or the influence of the Guoy-phase. In order to facilitate interpretation, the work presented here proposes an easy-to-use semi-analytical modeling Ansatz, which bases upon known analytical solutions using Gaussian beams. Specifically, we apply this Ansatz to compute nonlinear optical responses of (thin film) optical materials. We try to conserve the meaning of intuitive parameters like the Gouy-phase and the nonlinear coherent interaction length. In particular, the concept of coherence length is extended, which is a must when using focal beams. The model is subsequently applied to exemplary cases of second- and third-harmonic generation. We observe a very good agreement with experimental data, and furthermore, despite the constraints and limits of the analytical Ansatz, our model performs similarly well as when using more rigorous simulations. However, it outperforms the latter in terms of computational power, requiring more than three orders less computational time and less performant computer systems.","lang":"eng"}],"publication":"Journal of Applied Physics","main_file_link":[{"url":" https://doi.org/10.1063/5.0136252","open_access":"1"}],"doi":"10.1063/5.0136252","date_updated":"2023-10-11T16:10:54Z","oa":"1","author":[{"first_name":"Kai J.","full_name":"Spychala, Kai J.","last_name":"Spychala"},{"full_name":"Amber, Zeeshan H.","last_name":"Amber","first_name":"Zeeshan H."},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"}],"volume":133,"citation":{"bibtex":"@article{Spychala_Amber_Eng_Rüsing_2023, title={Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach}, volume={133}, DOI={<a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>}, number={12123105}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Spychala, Kai J. and Amber, Zeeshan H. and Eng, Lukas M. and Rüsing, Michael}, year={2023} }","short":"K.J. Spychala, Z.H. Amber, L.M. Eng, M. Rüsing, Journal of Applied Physics 133 (2023).","mla":"Spychala, Kai J., et al. “Modeling Nonlinear Optical Interactions of Focused Beams in Bulk Crystals and Thin Films: A Phenomenological Approach.” <i>Journal of Applied Physics</i>, vol. 133, no. 12, 123105, AIP Publishing, 2023, doi:<a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>.","apa":"Spychala, K. J., Amber, Z. H., Eng, L. M., &#38; Rüsing, M. (2023). Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach. <i>Journal of Applied Physics</i>, <i>133</i>(12), Article 123105. <a href=\"https://doi.org/10.1063/5.0136252\">https://doi.org/10.1063/5.0136252</a>","chicago":"Spychala, Kai J., Zeeshan H. Amber, Lukas M. Eng, and Michael Rüsing. “Modeling Nonlinear Optical Interactions of Focused Beams in Bulk Crystals and Thin Films: A Phenomenological Approach.” <i>Journal of Applied Physics</i> 133, no. 12 (2023). <a href=\"https://doi.org/10.1063/5.0136252\">https://doi.org/10.1063/5.0136252</a>.","ieee":"K. J. Spychala, Z. H. Amber, L. M. Eng, and M. Rüsing, “Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach,” <i>Journal of Applied Physics</i>, vol. 133, no. 12, Art. no. 123105, 2023, doi: <a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>.","ama":"Spychala KJ, Amber ZH, Eng LM, Rüsing M. Modeling nonlinear optical interactions of focused beams in bulk crystals and thin films: A phenomenological approach. <i>Journal of Applied Physics</i>. 2023;133(12). doi:<a href=\"https://doi.org/10.1063/5.0136252\">10.1063/5.0136252</a>"},"intvolume":"       133","publication_status":"published","publication_identifier":{"issn":["0021-8979","1089-7550"]},"article_number":"123105","article_type":"original","extern":"1","_id":"47994","user_id":"22501","status":"public","type":"journal_article"},{"abstract":[{"lang":"eng","text":"The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain structures, requires a profound understanding of the material properties and crystal structure. In this regard, Raman spectroscopy offers the possibility to study and visualize domain structures, strain, defects, and the local stoichiometry, which are all factors impacting device performance. However, the accurate interpretation of Raman spectra and their changes with respect to extrinsic and intrinsic defects requires a thorough assignment of the Raman modes to their respective crystal features, which to date is only partly conducted based on phenomenological modelling. To address this issue, we calculated the phonon spectra of potassium titanyl phosphate and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenate (KTiOAsO4) based on density functional theory and compared them with experimental data. Overall, this allows us to assign various spectral features to eigenmodes of lattice substructures with improved detail compared to previous assignments. Nevertheless, the analysis also shows that not all features of the spectra can unambigiously be explained yet. A possible explanation might be that defects or long range fields not included in the modeling play a crucial rule for the resulting Raman spectrum. In conclusion, this work provides an improved foundation into the vibrational properties in the KTiOPO4 material family."}],"publication":"Crystals","language":[{"iso":"eng"}],"keyword":["Inorganic Chemistry","Condensed Matter Physics","General Materials Science","General Chemical Engineering"],"year":"2023","issue":"10","quality_controlled":"1","title":"Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family","date_created":"2023-10-11T09:10:53Z","publisher":"MDPI AG","status":"public","type":"journal_article","funded_apc":"1","article_number":"1423","user_id":"22501","department":[{"_id":"169"}],"project":[{"grant_number":"231447078","_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"grant_number":"PROFILNRW-2020-067","_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing"}],"_id":"47997","citation":{"ieee":"S. Neufeld <i>et al.</i>, “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family,” <i>Crystals</i>, vol. 13, no. 10, Art. no. 1423, 2023, doi: <a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","chicago":"Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i> 13, no. 10 (2023). <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>.","ama":"Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>. 2023;13(10). doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>","bibtex":"@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023, title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>}, number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing, Michael}, year={2023} }","mla":"Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i>, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","short":"S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).","apa":"Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn, C., Eng, L. M., Schmidt, W. G., &#38; Rüsing, M. (2023). Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>, <i>13</i>(10), Article 1423. <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>"},"intvolume":"        13","publication_status":"published","publication_identifier":{"issn":["2073-4352"]},"main_file_link":[{"open_access":"1","url":"https://doi.org/10.3390/cryst13101423"}],"doi":"10.3390/cryst13101423","author":[{"first_name":"Sergej","last_name":"Neufeld","full_name":"Neufeld, Sergej"},{"first_name":"Uwe","full_name":"Gerstmann, Uwe","id":"171","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof","id":"13244","first_name":"Christof"},{"first_name":"Gerhard","last_name":"Berth","full_name":"Berth, Gerhard","id":"53"},{"first_name":"Christine","last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."},{"orcid":"0000-0002-2717-5076","last_name":"Schmidt","full_name":"Schmidt, Wolf Gero","id":"468","first_name":"Wolf Gero"},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","last_name":"Rüsing","orcid":"0000-0003-4682-4577"}],"volume":13,"date_updated":"2023-10-11T09:15:58Z","oa":"1"},{"keyword":["Condensed Matter Physics","Electronic","Optical and Magnetic Materials"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Specific heat capacity measurements by differential scanning calorimetry (DSC) of single crystals of solid solutions of LiNbO3 and LiTaO3 are reported and compared with corresponding ab initio calculations, with the aim to investigate the variation of the ferroelectric Curie temperature as a function of composition. For this purpose, single crystals of these solid solutions were grown with Czochralski pulling along the c-axis. Elemental composition of Nb and Ta was investigated using XRF analysis, and small samples with homogeneous and well known composition were used for the DSC measurements. We observed that the ferroelectric Curie temperature decreases linearly with increasing Ta concentration in the LiNb1−x Tax O3 solid solution crystals. Furthermore, the ferroelectric transition width of a mixed crystal appears to be smaller, as compared to pure LiTaO3."}],"publication":"Ferroelectrics","title":"Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition","publisher":"Informa UK Limited","date_created":"2023-10-11T09:10:08Z","year":"2023","quality_controlled":"1","issue":"1","article_type":"original","extern":"1","_id":"47996","user_id":"22501","status":"public","type":"journal_article","doi":"10.1080/00150193.2023.2189842","date_updated":"2023-10-11T09:10:36Z","volume":613,"author":[{"full_name":"Bashir, Umar","last_name":"Bashir","first_name":"Umar"},{"first_name":"Klaus","last_name":"Böttcher","full_name":"Böttcher, Klaus"},{"first_name":"Detlef","full_name":"Klimm, Detlef","last_name":"Klimm"},{"first_name":"Steffen","last_name":"Ganschow","full_name":"Ganschow, Steffen"},{"last_name":"Bernhardt","full_name":"Bernhardt, Felix","first_name":"Felix"},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"last_name":"Bickermann","full_name":"Bickermann, Matthias","first_name":"Matthias"}],"page":"250-262","intvolume":"       613","citation":{"ama":"Bashir U, Böttcher K, Klimm D, et al. Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition. <i>Ferroelectrics</i>. 2023;613(1):250-262. doi:<a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>","chicago":"Bashir, Umar, Klaus Böttcher, Detlef Klimm, Steffen Ganschow, Felix Bernhardt, Simone Sanna, Michael Rüsing, Lukas M. Eng, and Matthias Bickermann. “Solid Solutions of Lithium Niobate and Lithium Tantalate: Crystal Growth and the Ferroelectric Transition.” <i>Ferroelectrics</i> 613, no. 1 (2023): 250–62. <a href=\"https://doi.org/10.1080/00150193.2023.2189842\">https://doi.org/10.1080/00150193.2023.2189842</a>.","ieee":"U. Bashir <i>et al.</i>, “Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition,” <i>Ferroelectrics</i>, vol. 613, no. 1, pp. 250–262, 2023, doi: <a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>.","short":"U. Bashir, K. Böttcher, D. Klimm, S. Ganschow, F. Bernhardt, S. Sanna, M. Rüsing, L.M. Eng, M. Bickermann, Ferroelectrics 613 (2023) 250–262.","mla":"Bashir, Umar, et al. “Solid Solutions of Lithium Niobate and Lithium Tantalate: Crystal Growth and the Ferroelectric Transition.” <i>Ferroelectrics</i>, vol. 613, no. 1, Informa UK Limited, 2023, pp. 250–62, doi:<a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>.","bibtex":"@article{Bashir_Böttcher_Klimm_Ganschow_Bernhardt_Sanna_Rüsing_Eng_Bickermann_2023, title={Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition}, volume={613}, DOI={<a href=\"https://doi.org/10.1080/00150193.2023.2189842\">10.1080/00150193.2023.2189842</a>}, number={1}, journal={Ferroelectrics}, publisher={Informa UK Limited}, author={Bashir, Umar and Böttcher, Klaus and Klimm, Detlef and Ganschow, Steffen and Bernhardt, Felix and Sanna, Simone and Rüsing, Michael and Eng, Lukas M. and Bickermann, Matthias}, year={2023}, pages={250–262} }","apa":"Bashir, U., Böttcher, K., Klimm, D., Ganschow, S., Bernhardt, F., Sanna, S., Rüsing, M., Eng, L. M., &#38; Bickermann, M. (2023). Solid solutions of lithium niobate and lithium tantalate: crystal growth and the ferroelectric transition. <i>Ferroelectrics</i>, <i>613</i>(1), 250–262. <a href=\"https://doi.org/10.1080/00150193.2023.2189842\">https://doi.org/10.1080/00150193.2023.2189842</a>"},"publication_identifier":{"issn":["0015-0193","1563-5112"]},"publication_status":"published"},{"publisher":"American Physical Society (APS)","date_updated":"2024-01-09T15:05:29Z","oa":"1","volume":20,"author":[{"full_name":"Beccard, Henrik","last_name":"Beccard","first_name":"Henrik"},{"first_name":"Elke","last_name":"Beyreuther","full_name":"Beyreuther, Elke"},{"last_name":"Kirbus","full_name":"Kirbus, Benjamin","first_name":"Benjamin"},{"last_name":"Seddon","full_name":"Seddon, Samuel D.","first_name":"Samuel D."},{"full_name":"Rüsing, Michael","id":"22501","orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."}],"date_created":"2024-01-09T15:03:22Z","title":"Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall","doi":"10.1103/physrevapplied.20.064043","main_file_link":[{"open_access":"1","url":"https://arxiv.org/pdf/2308.00061.pdf"}],"publication_identifier":{"issn":["2331-7019"]},"publication_status":"published","issue":"6","year":"2023","intvolume":"        20","citation":{"ieee":"H. Beccard, E. Beyreuther, B. Kirbus, S. D. Seddon, M. Rüsing, and L. M. Eng, “Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall,” <i>Physical Review Applied</i>, vol. 20, no. 6, Art. no. 064043, 2023, doi: <a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>.","chicago":"Beccard, Henrik, Elke Beyreuther, Benjamin Kirbus, Samuel D. Seddon, Michael Rüsing, and Lukas M. Eng. “Hall Mobilities and Sheet Carrier Densities in a Single LiNbO3 Conductive Ferroelectric Domain Wall.” <i>Physical Review Applied</i> 20, no. 6 (2023). <a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">https://doi.org/10.1103/physrevapplied.20.064043</a>.","ama":"Beccard H, Beyreuther E, Kirbus B, Seddon SD, Rüsing M, Eng LM. Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall. <i>Physical Review Applied</i>. 2023;20(6). doi:<a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>","bibtex":"@article{Beccard_Beyreuther_Kirbus_Seddon_Rüsing_Eng_2023, title={Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall}, volume={20}, DOI={<a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>}, number={6064043}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Beccard, Henrik and Beyreuther, Elke and Kirbus, Benjamin and Seddon, Samuel D. and Rüsing, Michael and Eng, Lukas M.}, year={2023} }","mla":"Beccard, Henrik, et al. “Hall Mobilities and Sheet Carrier Densities in a Single LiNbO3 Conductive Ferroelectric Domain Wall.” <i>Physical Review Applied</i>, vol. 20, no. 6, 064043, American Physical Society (APS), 2023, doi:<a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">10.1103/physrevapplied.20.064043</a>.","short":"H. Beccard, E. Beyreuther, B. Kirbus, S.D. Seddon, M. Rüsing, L.M. Eng, Physical Review Applied 20 (2023).","apa":"Beccard, H., Beyreuther, E., Kirbus, B., Seddon, S. D., Rüsing, M., &#38; Eng, L. M. (2023). Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric domain wall. <i>Physical Review Applied</i>, <i>20</i>(6), Article 064043. <a href=\"https://doi.org/10.1103/physrevapplied.20.064043\">https://doi.org/10.1103/physrevapplied.20.064043</a>"},"_id":"50407","user_id":"22501","keyword":["General Physics and Astronomy"],"article_type":"original","article_number":"064043","language":[{"iso":"eng"}],"publication":"Physical Review Applied","type":"journal_article","abstract":[{"lang":"eng","text":"In the last decade, conductive domain walls (CDWs) in single crystals of the uniaxial model ferroelectric lithium niobate (LiNbO3; LNO) have been shown to reach resistances more than 10 orders of magnitude lower than the resistance of the surrounding bulk, with charge carriers being firmly confined to sheets with a width of a few nanometers. LNO is thus currently witnessing increased attention because of its potential in the design of room-temperature nanoelectronic circuits and devices based on such CDWs. In this context, the reliable determination of the fundamental transport parameters of LNO CDWs, in particular the 2D charge carrier density n2D and the Hall mobility μH of the majority carriers, is of great interest. In this contribution, we present and apply a robust and easy-to-prepare Hall-effect measurement setup by adapting the standard four-probe van der Pauw method to contact a single, hexagonally shaped domain wall that fully penetrates the 200-μm-thick LNO bulk single crystal. We then determine n2D and μH for a set of external magnetic fields B and prove the expected cosinelike angular dependence of the Hall voltage. Lastly, we present photoinduced-Hall-effect measurements of one and the same DW, by determining the impact of super-band-gap illumination on n2D."}],"status":"public"},{"title":"Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family","doi":"10.3390/cryst13101423","publisher":"MDPI AG","date_updated":"2024-06-24T06:30:23Z","date_created":"2024-06-24T06:15:00Z","author":[{"first_name":"Sergej","full_name":"Neufeld, Sergej","last_name":"Neufeld"},{"id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","first_name":"Uwe"},{"first_name":"Laura","last_name":"Padberg","id":"40300","full_name":"Padberg, Laura"},{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof","first_name":"Christof"},{"first_name":"Gerhard","last_name":"Berth","full_name":"Berth, Gerhard","id":"53"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."},{"first_name":"Wolf Gero","id":"468","full_name":"Schmidt, Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076"},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"}],"volume":13,"year":"2023","citation":{"chicago":"Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i> 13, no. 10 (2023). <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>.","ieee":"S. Neufeld <i>et al.</i>, “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family,” <i>Crystals</i>, vol. 13, no. 10, Art. no. 1423, 2023, doi: <a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","ama":"Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>. 2023;13(10). doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>","mla":"Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i>, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","bibtex":"@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023, title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>}, number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing, Michael}, year={2023} }","short":"S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).","apa":"Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn, C., Eng, L. M., Schmidt, W. G., &#38; Rüsing, M. (2023). Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>, <i>13</i>(10), Article 1423. <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>"},"intvolume":"        13","publication_status":"published","publication_identifier":{"issn":["2073-4352"]},"issue":"10","article_number":"1423","language":[{"iso":"eng"}],"project":[{"grant_number":"231447078","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"}],"_id":"54852","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"288"},{"_id":"230"},{"_id":"429"}],"abstract":[{"text":"<jats:p>The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain structures, requires a profound understanding of the material properties and crystal structure. In this regard, Raman spectroscopy offers the possibility to study and visualize domain structures, strain, defects, and the local stoichiometry, which are all factors impacting device performance. However, the accurate interpretation of Raman spectra and their changes with respect to extrinsic and intrinsic defects requires a thorough assignment of the Raman modes to their respective crystal features, which to date is only partly conducted based on phenomenological modelling. To address this issue, we calculated the phonon spectra of potassium titanyl phosphate and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenate (KTiOAsO4) based on density functional theory and compared them with experimental data. Overall, this allows us to assign various spectral features to eigenmodes of lattice substructures with improved detail compared to previous assignments. Nevertheless, the analysis also shows that not all features of the spectra can unambigiously be explained yet. A possible explanation might be that defects or long range fields not included in the modeling play a crucial rule for the resulting Raman spectrum. In conclusion, this work provides an improved foundation into the vibrational properties in the KTiOPO4 material family.</jats:p>","lang":"eng"}],"status":"public","type":"journal_article","publication":"Crystals"},{"article_type":"original","extern":"1","funded_apc":"1","_id":"47984","user_id":"22501","status":"public","type":"journal_article","doi":"10.1063/5.0094988","main_file_link":[{"url":" https://doi.org/10.1063/5.0094988","open_access":"1"}],"oa":"1","date_updated":"2023-10-11T08:53:55Z","volume":131,"author":[{"last_name":"Hegarty","full_name":"Hegarty, Peter A.","first_name":"Peter A."},{"first_name":"Henrik","full_name":"Beccard, Henrik","last_name":"Beccard"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"}],"intvolume":"       131","citation":{"short":"P.A. Hegarty, H. Beccard, L.M. Eng, M. Rüsing, Journal of Applied Physics 131 (2022).","mla":"Hegarty, Peter A., et al. “Turn All the Lights off: Bright- and Dark-Field Second-Harmonic Microscopy to Select Contrast Mechanisms for Ferroelectric Domain Walls.” <i>Journal of Applied Physics</i>, vol. 131, no. 24, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>.","bibtex":"@article{Hegarty_Beccard_Eng_Rüsing_2022, title={Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls}, volume={131}, DOI={<a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>}, number={24}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Hegarty, Peter A. and Beccard, Henrik and Eng, Lukas M. and Rüsing, Michael}, year={2022} }","apa":"Hegarty, P. A., Beccard, H., Eng, L. M., &#38; Rüsing, M. (2022). Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls. <i>Journal of Applied Physics</i>, <i>131</i>(24). <a href=\"https://doi.org/10.1063/5.0094988\">https://doi.org/10.1063/5.0094988</a>","chicago":"Hegarty, Peter A., Henrik Beccard, Lukas M. Eng, and Michael Rüsing. “Turn All the Lights off: Bright- and Dark-Field Second-Harmonic Microscopy to Select Contrast Mechanisms for Ferroelectric Domain Walls.” <i>Journal of Applied Physics</i> 131, no. 24 (2022). <a href=\"https://doi.org/10.1063/5.0094988\">https://doi.org/10.1063/5.0094988</a>.","ieee":"P. A. Hegarty, H. Beccard, L. M. Eng, and M. Rüsing, “Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls,” <i>Journal of Applied Physics</i>, vol. 131, no. 24, 2022, doi: <a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>.","ama":"Hegarty PA, Beccard H, Eng LM, Rüsing M. Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls. <i>Journal of Applied Physics</i>. 2022;131(24). doi:<a href=\"https://doi.org/10.1063/5.0094988\">10.1063/5.0094988</a>"},"publication_identifier":{"issn":["0021-8979","1089-7550"]},"publication_status":"published","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"abstract":[{"text":"Recent analyses by polarization resolved second-harmonic (SH) microscopy have demonstrated that ferroelectric (FE) domain walls (DWs) can possess non-Ising wall characteristics and topological nature. These analyses rely on locally analyzing the properties, directionality, and magnitude of the second-order nonlinear tensor. However, when inspecting FE DWs with SH microscopy, a manifold of different effects may contribute to the observed signal difference between domains and DWs, i.e., far-field interference, Čerenkov-type phase-matching (CSHG), and changes in the aforementioned local nonlinear optical properties. They all might be present at the same time and, therefore, require careful interpretation and separation. In this work, we demonstrate how the particularly strong Čerenkov-type contrast can selectively be blocked using dark- and bright-field SH microscopy. Based on this approach, we show that other contrast mechanisms emerge that were previously overlayed by CSHG but can now be readily selected through the appropriate experimental geometry. Using the methods presented, we show that the strength of the CSHG contrast compared to the other mechanisms is approximately 22 times higher. This work lays the foundation for the in-depth analysis of FE DW topologies by SH microscopy.","lang":"eng"}],"publication":"Journal of Applied Physics","title":"Turn all the lights off: Bright- and dark-field second-harmonic microscopy to select contrast mechanisms for ferroelectric domain walls","publisher":"AIP Publishing","date_created":"2023-10-11T08:53:25Z","year":"2022","quality_controlled":"1","issue":"24"},{"keyword":["Physics and Astronomy (miscellaneous)"],"language":[{"iso":"eng"}],"publication":"Applied Physics Letters","abstract":[{"text":"Spontaneous Raman spectroscopy (SR) is a versatile method for analysis and visualization of ferroelectric crystal structures, including domain walls. Nevertheless, the necessary acquisition time makes SR impractical for in situ analysis and large scale imaging. In this work, we introduce broadband coherent anti-Stokes Raman spectroscopy (B-CARS) as a high-speed alternative to conventional Raman techniques and demonstrate its benefits for ferroelectric domain wall analysis. Using the example of poled lithium niobate, we compare the spectral output of both techniques in terms of domain wall signatures and imaging capabilities. We extract the Raman-like resonant part of the coherent anti-Stokes signal via a Kramers–Kronig-based phase retrieval algorithm and compare the raw and phase-retrieved signals to SR characteristics. Finally, we propose a mechanism for the observed domain wall signal strength that resembles a Čerenkov-like behavior, in close analogy to domain wall signatures obtained by second-harmonic generation imaging. We, thus, lay here the foundations for future investigations on other poled ferroelectric crystals using B-CARS.","lang":"eng"}],"publisher":"AIP Publishing","date_created":"2023-10-11T08:50:06Z","title":"High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering","quality_controlled":"1","issue":"16","year":"2022","_id":"47982","user_id":"22501","article_type":"original","article_number":"162901","extern":"1","type":"journal_article","status":"public","date_updated":"2023-10-11T08:50:42Z","author":[{"first_name":"Sven","full_name":"Reitzig, Sven","last_name":"Reitzig"},{"first_name":"Franz","last_name":"Hempel","full_name":"Hempel, Franz"},{"first_name":"Julius","full_name":"Ratzenberger, Julius","last_name":"Ratzenberger"},{"first_name":"Peter A.","full_name":"Hegarty, Peter A.","last_name":"Hegarty"},{"full_name":"Amber, Zeeshan H.","last_name":"Amber","first_name":"Zeeshan H."},{"full_name":"Buschbeck, Robin","last_name":"Buschbeck","first_name":"Robin"},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","last_name":"Rüsing","orcid":"0000-0003-4682-4577"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."}],"volume":120,"doi":"10.1063/5.0086029","publication_status":"published","publication_identifier":{"issn":["0003-6951","1077-3118"]},"citation":{"short":"S. Reitzig, F. Hempel, J. Ratzenberger, P.A. Hegarty, Z.H. Amber, R. Buschbeck, M. Rüsing, L.M. Eng, Applied Physics Letters 120 (2022).","bibtex":"@article{Reitzig_Hempel_Ratzenberger_Hegarty_Amber_Buschbeck_Rüsing_Eng_2022, title={High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering}, volume={120}, DOI={<a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>}, number={16162901}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Reitzig, Sven and Hempel, Franz and Ratzenberger, Julius and Hegarty, Peter A. and Amber, Zeeshan H. and Buschbeck, Robin and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","mla":"Reitzig, Sven, et al. “High-Speed Hyperspectral Imaging of Ferroelectric Domain Walls Using Broadband Coherent Anti-Stokes Raman Scattering.” <i>Applied Physics Letters</i>, vol. 120, no. 16, 162901, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>.","apa":"Reitzig, S., Hempel, F., Ratzenberger, J., Hegarty, P. A., Amber, Z. H., Buschbeck, R., Rüsing, M., &#38; Eng, L. M. (2022). High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering. <i>Applied Physics Letters</i>, <i>120</i>(16), Article 162901. <a href=\"https://doi.org/10.1063/5.0086029\">https://doi.org/10.1063/5.0086029</a>","ama":"Reitzig S, Hempel F, Ratzenberger J, et al. High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering. <i>Applied Physics Letters</i>. 2022;120(16). doi:<a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>","ieee":"S. Reitzig <i>et al.</i>, “High-speed hyperspectral imaging of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering,” <i>Applied Physics Letters</i>, vol. 120, no. 16, Art. no. 162901, 2022, doi: <a href=\"https://doi.org/10.1063/5.0086029\">10.1063/5.0086029</a>.","chicago":"Reitzig, Sven, Franz Hempel, Julius Ratzenberger, Peter A. Hegarty, Zeeshan H. Amber, Robin Buschbeck, Michael Rüsing, and Lukas M. Eng. “High-Speed Hyperspectral Imaging of Ferroelectric Domain Walls Using Broadband Coherent Anti-Stokes Raman Scattering.” <i>Applied Physics Letters</i> 120, no. 16 (2022). <a href=\"https://doi.org/10.1063/5.0086029\">https://doi.org/10.1063/5.0086029</a>."},"intvolume":"       120"},{"extern":"1","article_number":"144103","article_type":"original","user_id":"22501","_id":"47986","status":"public","type":"journal_article","doi":"10.1103/physrevb.106.144103","volume":106,"author":[{"full_name":"Singh, Ekta","last_name":"Singh","first_name":"Ekta"},{"first_name":"Henrik","full_name":"Beccard, Henrik","last_name":"Beccard"},{"first_name":"Zeeshan H.","full_name":"Amber, Zeeshan H.","last_name":"Amber"},{"last_name":"Ratzenberger","full_name":"Ratzenberger, Julius","first_name":"Julius"},{"first_name":"Clifford W.","last_name":"Hicks","full_name":"Hicks, Clifford W."},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","last_name":"Rüsing","orcid":"0000-0003-4682-4577"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."}],"date_updated":"2023-10-11T08:56:09Z","intvolume":"       106","citation":{"short":"E. Singh, H. Beccard, Z.H. Amber, J. Ratzenberger, C.W. Hicks, M. Rüsing, L.M. Eng, Physical Review B 106 (2022).","bibtex":"@article{Singh_Beccard_Amber_Ratzenberger_Hicks_Rüsing_Eng_2022, title={Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress}, volume={106}, DOI={<a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>}, number={14144103}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Singh, Ekta and Beccard, Henrik and Amber, Zeeshan H. and Ratzenberger, Julius and Hicks, Clifford W. and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","mla":"Singh, Ekta, et al. “Tuning Domain Wall Conductivity in Bulk Lithium Niobate by Uniaxial Stress.” <i>Physical Review B</i>, vol. 106, no. 14, 144103, American Physical Society (APS), 2022, doi:<a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>.","apa":"Singh, E., Beccard, H., Amber, Z. H., Ratzenberger, J., Hicks, C. W., Rüsing, M., &#38; Eng, L. M. (2022). Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress. <i>Physical Review B</i>, <i>106</i>(14), Article 144103. <a href=\"https://doi.org/10.1103/physrevb.106.144103\">https://doi.org/10.1103/physrevb.106.144103</a>","ama":"Singh E, Beccard H, Amber ZH, et al. Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress. <i>Physical Review B</i>. 2022;106(14). doi:<a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>","ieee":"E. Singh <i>et al.</i>, “Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress,” <i>Physical Review B</i>, vol. 106, no. 14, Art. no. 144103, 2022, doi: <a href=\"https://doi.org/10.1103/physrevb.106.144103\">10.1103/physrevb.106.144103</a>.","chicago":"Singh, Ekta, Henrik Beccard, Zeeshan H. Amber, Julius Ratzenberger, Clifford W. Hicks, Michael Rüsing, and Lukas M. Eng. “Tuning Domain Wall Conductivity in Bulk Lithium Niobate by Uniaxial Stress.” <i>Physical Review B</i> 106, no. 14 (2022). <a href=\"https://doi.org/10.1103/physrevb.106.144103\">https://doi.org/10.1103/physrevb.106.144103</a>."},"publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Conductive domain walls (DWs) in insulating ferroelectrics have recently attracted considerable attention due to their unique topological, optical, and electronic properties, and offer potential applications such as in memory devices or rewritable circuitry. The electronic properties of DWs can be tuned by the application of strain, hence controlling the charge carrier density at DWs. In this paper, we study the influence of uniaxial stress on the conductivity of DWs in the bulk single crystal lithium niobate (LiNbO3). Using conductive atomic force microscopy, we observe a large asymmetry in the conductivity of DWs, where only negatively screened walls, so called head-to-head DWs, are becoming increasingly conductive, while positively screened, tail-to-tails DWs, show a decrease in conductivity. This asymmetry of DW conductivity agrees with our theoretical model based on the piezoelectric effect. In addition, we observed that the current in the DW increases up to an order of magnitude for smaller compressive stresses of 100 MPa. This response of DWs remained intact for multiple stress cycles over two months, opening a path for future applications."}],"publication":"Physical Review B","title":"Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress","date_created":"2023-10-11T08:55:42Z","publisher":"American Physical Society (APS)","year":"2022","issue":"14","quality_controlled":"1"},{"volume":5,"author":[{"full_name":"Beccard, Henrik","last_name":"Beccard","first_name":"Henrik"},{"first_name":"Benjamin","full_name":"Kirbus, Benjamin","last_name":"Kirbus"},{"last_name":"Beyreuther","full_name":"Beyreuther, Elke","first_name":"Elke"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael"},{"full_name":"Bednyakov, Petr","last_name":"Bednyakov","first_name":"Petr"},{"full_name":"Hlinka, Jiří","last_name":"Hlinka","first_name":"Jiří"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."}],"date_updated":"2023-10-11T08:55:16Z","doi":"10.1021/acsanm.2c01919","publication_identifier":{"issn":["2574-0970","2574-0970"]},"publication_status":"published","page":"8717-8722","intvolume":"         5","citation":{"apa":"Beccard, H., Kirbus, B., Beyreuther, E., Rüsing, M., Bednyakov, P., Hlinka, J., &#38; Eng, L. M. (2022). Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls. <i>ACS Applied Nano Materials</i>, <i>5</i>(7), 8717–8722. <a href=\"https://doi.org/10.1021/acsanm.2c01919\">https://doi.org/10.1021/acsanm.2c01919</a>","bibtex":"@article{Beccard_Kirbus_Beyreuther_Rüsing_Bednyakov_Hlinka_Eng_2022, title={Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls}, volume={5}, DOI={<a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>}, number={7}, journal={ACS Applied Nano Materials}, publisher={American Chemical Society (ACS)}, author={Beccard, Henrik and Kirbus, Benjamin and Beyreuther, Elke and Rüsing, Michael and Bednyakov, Petr and Hlinka, Jiří and Eng, Lukas M.}, year={2022}, pages={8717–8722} }","mla":"Beccard, Henrik, et al. “Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls.” <i>ACS Applied Nano Materials</i>, vol. 5, no. 7, American Chemical Society (ACS), 2022, pp. 8717–22, doi:<a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>.","short":"H. Beccard, B. Kirbus, E. Beyreuther, M. Rüsing, P. Bednyakov, J. Hlinka, L.M. Eng, ACS Applied Nano Materials 5 (2022) 8717–8722.","ieee":"H. Beccard <i>et al.</i>, “Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls,” <i>ACS Applied Nano Materials</i>, vol. 5, no. 7, pp. 8717–8722, 2022, doi: <a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>.","chicago":"Beccard, Henrik, Benjamin Kirbus, Elke Beyreuther, Michael Rüsing, Petr Bednyakov, Jiří Hlinka, and Lukas M. Eng. “Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls.” <i>ACS Applied Nano Materials</i> 5, no. 7 (2022): 8717–22. <a href=\"https://doi.org/10.1021/acsanm.2c01919\">https://doi.org/10.1021/acsanm.2c01919</a>.","ama":"Beccard H, Kirbus B, Beyreuther E, et al. Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls. <i>ACS Applied Nano Materials</i>. 2022;5(7):8717-8722. doi:<a href=\"https://doi.org/10.1021/acsanm.2c01919\">10.1021/acsanm.2c01919</a>"},"user_id":"22501","_id":"47985","extern":"1","article_type":"original","type":"journal_article","status":"public","date_created":"2023-10-11T08:54:20Z","publisher":"American Chemical Society (ACS)","title":"Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls","issue":"7","quality_controlled":"1","year":"2022","language":[{"iso":"eng"}],"keyword":["General Materials Science"],"publication":"ACS Applied Nano Materials","abstract":[{"text":"Strongly charged head-to-head domain walls that are purposely engineered along the [110] crystallographic orientation into ferroelectric BaTiO3 single crystals have been proposed as intrinsically nanoscaled two-dimensional electron gases (2DEGs) because of their significant conductivity. Here, we quantify these 2DEG properties through dedicated Hall transport measurements in van der Pauw 4-point geometry, finding the electron mobility to reach around 400 cm2 (V s)^{−1}, while the two-dimensional charge density amounts to 7 × 103 cm^{–2}. We underline the necessity to take into account the thermal and geometrical misalignment offset voltages by evaluating the Hall resistance under magnetic field sweeps; otherwise, errors of several hundred percent in the derived transport parameters can occur.","lang":"eng"}]},{"date_updated":"2023-10-11T08:49:43Z","publisher":"SPIE","date_created":"2023-10-11T08:47:26Z","author":[{"full_name":"Golde, Jonas","last_name":"Golde","first_name":"Jonas"},{"first_name":"Michael","id":"22501","full_name":"Rüsing, Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing"},{"first_name":"Richard","full_name":"Kindler, Richard","last_name":"Kindler"},{"last_name":"Steuer","full_name":"Steuer, Svea","first_name":"Svea"},{"full_name":"Rix, Jan","last_name":"Rix","first_name":"Jan"},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"last_name":"Koch","full_name":"Koch, Edmund","first_name":"Edmund"}],"title":"Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography","doi":"10.1117/12.2608470","conference":{"location":"San Francisco, California, United States","start_date":"2022","name":"Optical Components and Materials XIX"},"quality_controlled":"1","publication_status":"published","year":"2022","citation":{"ama":"Golde J, Rüsing M, Kindler R, et al. Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography. In: Digonnet MJ, Jiang S, eds. <i>Optical Components and Materials XIX</i>. SPIE; 2022. doi:<a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>","apa":"Golde, J., Rüsing, M., Kindler, R., Steuer, S., Rix, J., Eng, L. M., &#38; Koch, E. (2022). Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography. In M. J. Digonnet &#38; S. Jiang (Eds.), <i>Optical Components and Materials XIX</i>. SPIE. <a href=\"https://doi.org/10.1117/12.2608470\">https://doi.org/10.1117/12.2608470</a>","short":"J. Golde, M. Rüsing, R. Kindler, S. Steuer, J. Rix, L.M. Eng, E. Koch, in: M.J. Digonnet, S. Jiang (Eds.), Optical Components and Materials XIX, SPIE, 2022.","bibtex":"@inproceedings{Golde_Rüsing_Kindler_Steuer_Rix_Eng_Koch_2022, title={Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography}, DOI={<a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>}, booktitle={Optical Components and Materials XIX}, publisher={SPIE}, author={Golde, Jonas and Rüsing, Michael and Kindler, Richard and Steuer, Svea and Rix, Jan and Eng, Lukas M. and Koch, Edmund}, editor={Digonnet, Michel J. and Jiang, Shibin}, year={2022} }","mla":"Golde, Jonas, et al. “Investigation of Ferroelectric Domain Walls in Periodically-Poled LiNbO3 Single Crystals by Polarization-Sensitive Optical Coherence Tomography.” <i>Optical Components and Materials XIX</i>, edited by Michel J. Digonnet and Shibin Jiang, SPIE, 2022, doi:<a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>.","chicago":"Golde, Jonas, Michael Rüsing, Richard Kindler, Svea Steuer, Jan Rix, Lukas M. Eng, and Edmund Koch. “Investigation of Ferroelectric Domain Walls in Periodically-Poled LiNbO3 Single Crystals by Polarization-Sensitive Optical Coherence Tomography.” In <i>Optical Components and Materials XIX</i>, edited by Michel J. Digonnet and Shibin Jiang. SPIE, 2022. <a href=\"https://doi.org/10.1117/12.2608470\">https://doi.org/10.1117/12.2608470</a>.","ieee":"J. Golde <i>et al.</i>, “Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography,” in <i>Optical Components and Materials XIX</i>, San Francisco, California, United States, 2022, doi: <a href=\"https://doi.org/10.1117/12.2608470\">10.1117/12.2608470</a>."},"_id":"47981","user_id":"22501","extern":"1","language":[{"iso":"eng"}],"publication":"Optical Components and Materials XIX","type":"conference","editor":[{"first_name":"Michel J.","last_name":"Digonnet","full_name":"Digonnet, Michel J."},{"last_name":"Jiang","full_name":"Jiang, Shibin","first_name":"Shibin"}],"status":"public"},{"status":"public","type":"journal_article","funded_apc":"1","article_number":"213102","article_type":"original","user_id":"22501","_id":"47989","citation":{"ama":"Amber ZH, Spychala KJ, Eng LM, Rüsing M. Nonlinear optical interactions in focused beams and nanosized structures. <i>Journal of Applied Physics</i>. 2022;132(21). doi:<a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>","ieee":"Z. H. Amber, K. J. Spychala, L. M. Eng, and M. Rüsing, “Nonlinear optical interactions in focused beams and nanosized structures,” <i>Journal of Applied Physics</i>, vol. 132, no. 21, Art. no. 213102, 2022, doi: <a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>.","chicago":"Amber, Zeeshan H., Kai J. Spychala, Lukas M. Eng, and Michael Rüsing. “Nonlinear Optical Interactions in Focused Beams and Nanosized Structures.” <i>Journal of Applied Physics</i> 132, no. 21 (2022). <a href=\"https://doi.org/10.1063/5.0125926\">https://doi.org/10.1063/5.0125926</a>.","short":"Z.H. Amber, K.J. Spychala, L.M. Eng, M. Rüsing, Journal of Applied Physics 132 (2022).","mla":"Amber, Zeeshan H., et al. “Nonlinear Optical Interactions in Focused Beams and Nanosized Structures.” <i>Journal of Applied Physics</i>, vol. 132, no. 21, 213102, AIP Publishing, 2022, doi:<a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>.","bibtex":"@article{Amber_Spychala_Eng_Rüsing_2022, title={Nonlinear optical interactions in focused beams and nanosized structures}, volume={132}, DOI={<a href=\"https://doi.org/10.1063/5.0125926\">10.1063/5.0125926</a>}, number={21213102}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Amber, Zeeshan H. and Spychala, Kai J. and Eng, Lukas M. and Rüsing, Michael}, year={2022} }","apa":"Amber, Z. H., Spychala, K. J., Eng, L. M., &#38; Rüsing, M. (2022). Nonlinear optical interactions in focused beams and nanosized structures. <i>Journal of Applied Physics</i>, <i>132</i>(21), Article 213102. <a href=\"https://doi.org/10.1063/5.0125926\">https://doi.org/10.1063/5.0125926</a>"},"intvolume":"       132","publication_status":"published","publication_identifier":{"issn":["0021-8979","1089-7550"]},"main_file_link":[{"open_access":"1","url":" https://doi.org/10.1063/5.0125926"}],"doi":"10.1063/5.0125926","author":[{"first_name":"Zeeshan H.","full_name":"Amber, Zeeshan H.","last_name":"Amber"},{"first_name":"Kai J.","full_name":"Spychala, Kai J.","last_name":"Spychala"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"}],"volume":132,"date_updated":"2023-10-11T09:01:37Z","oa":"1","abstract":[{"text":"Thin-film materials from μm thickness down to single-atomic-layered 2D materials play a central role in many novel electronic and optical applications. Coherent, nonlinear optical (NLO) μ-spectroscopy offers insight into the local thickness, stacking order, symmetry, or electronic and vibrational properties. Thin films and 2D materials are usually supported on multi-layered substrates leading to (multi-)reflections, interference, or phase jumps at interfaces during μ-spectroscopy, which all can make the interpretation of experiments particularly challenging. The disentanglement of the influence parameters can be achieved via rigorous theoretical analysis. In this work, we compare two self-developed modeling approaches, a semi-analytical and a fully vectorial model, to experiments carried out in thin-film geometry for two archetypal NLO processes, second-harmonic and third-harmonic generation. In particular, we demonstrate that thin-film interference and phase matching do heavily influence the signal strength. Furthermore, we work out key differences between three and four photon processes, such as the role of the Gouy-phase shift and the focal position. Last, we can show that a relatively simple semi-analytical model, despite its limitations, is able to accurately describe experiments at a significantly lower computational cost as compared to a full vectorial modeling. This study lays the groundwork for performing quantitative NLO μ-spectroscopy on thin films and 2D materials, as it identifies and quantifies the impact of the corresponding sample and setup parameters on the NLO signal, in order to distinguish them from genuine material properties.<","lang":"eng"}],"publication":"Journal of Applied Physics","language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy"],"year":"2022","issue":"21","quality_controlled":"1","title":"Nonlinear optical interactions in focused beams and nanosized structures","date_created":"2023-10-11T08:59:23Z","publisher":"AIP Publishing"},{"publication":"Zeitschrift für anorganische und allgemeine Chemie","abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>Pure samples of colorless, air‐stable Ba(BO<jats:sub>2</jats:sub>OH) crystals were obtained from Ba(NO<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub> and H<jats:sub>3</jats:sub>BO<jats:sub>3</jats:sub> under the ultra‐alkaline conditions of a KOH hydroflux at about 250 °C. The product formation depends on the water‐base molar ratio and the molar ratio of the starting materials. B(OH)<jats:sub>3</jats:sub> acts as a proton donor (Brønsted acid) rather than a hydroxide acceptor (Lewis acid). Ba(BO<jats:sub>2</jats:sub>OH) crystallizes in the non‐centrosymmetric orthorhombic space group <jats:italic>P</jats:italic>2<jats:sub>1</jats:sub>2<jats:sub>1</jats:sub>2<jats:sub>1</jats:sub>. Hydrogen bonds connect the almost planar (BO<jats:sub>2</jats:sub>OH)<jats:sup>2−</jats:sup> anions, which are isostructural to HCO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, into a syndiotactic chain. IR and Raman spectroscopy confirm the presence of hydroxide groups, which are involved in weak hydrogen bonds. Upon heating in air to about 450 °C, Ba(BO<jats:sub>2</jats:sub>OH) dehydrates to Ba<jats:sub>2</jats:sub>B<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>. Moreover, the non‐centrosymmetric structure of Ba(BO<jats:sub>2</jats:sub>OH) crystals was verified with power‐dependent confocal Second Harmonic Generation (SHG) microscopy indicating large conversion efficiencies in ambient atmosphere.</jats:p>","lang":"eng"}],"keyword":["Inorganic Chemistry"],"language":[{"iso":"eng"}],"quality_controlled":"1","issue":"21","year":"2022","publisher":"Wiley","date_created":"2023-10-11T08:56:26Z","title":"Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation","type":"journal_article","status":"public","_id":"47987","user_id":"22501","article_type":"original","article_number":" e2022001","extern":"1","publication_identifier":{"issn":["0044-2313","1521-3749"]},"publication_status":"published","intvolume":"       648","citation":{"short":"Y. Li, P.A. Hegarty, M. Rüsing, L.M. Eng, M. Ruck, Zeitschrift Für Anorganische Und Allgemeine Chemie 648 (2022).","mla":"Li, Yuxi, et al. “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation.” <i>Zeitschrift Für Anorganische Und Allgemeine Chemie</i>, vol. 648, no. 21, e2022001, Wiley, 2022, doi:<a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>.","bibtex":"@article{Li_Hegarty_Rüsing_Eng_Ruck_2022, title={Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation}, volume={648}, DOI={<a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>}, number={21e2022001}, journal={Zeitschrift für anorganische und allgemeine Chemie}, publisher={Wiley}, author={Li, Yuxi and Hegarty, Peter A. and Rüsing, Michael and Eng, Lukas M. and Ruck, Michael}, year={2022} }","apa":"Li, Y., Hegarty, P. A., Rüsing, M., Eng, L. M., &#38; Ruck, M. (2022). Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation. <i>Zeitschrift Für Anorganische Und Allgemeine Chemie</i>, <i>648</i>(21), Article e2022001. <a href=\"https://doi.org/10.1002/zaac.202200193\">https://doi.org/10.1002/zaac.202200193</a>","ama":"Li Y, Hegarty PA, Rüsing M, Eng LM, Ruck M. Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation. <i>Zeitschrift für anorganische und allgemeine Chemie</i>. 2022;648(21). doi:<a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>","ieee":"Y. Li, P. A. Hegarty, M. Rüsing, L. M. Eng, and M. Ruck, “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation,” <i>Zeitschrift für anorganische und allgemeine Chemie</i>, vol. 648, no. 21, Art. no. e2022001, 2022, doi: <a href=\"https://doi.org/10.1002/zaac.202200193\">10.1002/zaac.202200193</a>.","chicago":"Li, Yuxi, Peter A. Hegarty, Michael Rüsing, Lukas M. Eng, and Michael Ruck. “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation.” <i>Zeitschrift Für Anorganische Und Allgemeine Chemie</i> 648, no. 21 (2022). <a href=\"https://doi.org/10.1002/zaac.202200193\">https://doi.org/10.1002/zaac.202200193</a>."},"date_updated":"2023-10-11T08:59:51Z","oa":"1","volume":648,"author":[{"first_name":"Yuxi","full_name":"Li, Yuxi","last_name":"Li"},{"last_name":"Hegarty","full_name":"Hegarty, Peter A.","first_name":"Peter A."},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael","id":"22501","first_name":"Michael"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."},{"first_name":"Michael","full_name":"Ruck, Michael","last_name":"Ruck"}],"doi":"10.1002/zaac.202200193","main_file_link":[{"open_access":"1","url":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/zaac.202200193"}]},{"doi":"10.1063/5.0115673","main_file_link":[{"url":" https://doi.org/10.1063/5.0115673","open_access":"1"}],"date_updated":"2023-10-11T08:58:50Z","oa":"1","volume":132,"author":[{"full_name":"Hegarty, Peter A.","last_name":"Hegarty","first_name":"Peter A."},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"full_name":"Rüsing, Michael","id":"22501","orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael"}],"intvolume":"       132","page":"214102","citation":{"apa":"Hegarty, P. A., Eng, L. M., &#38; Rüsing, M. (2022). Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion. <i>Journal of Applied Physics</i>, <i>132</i>(21), 214102. <a href=\"https://doi.org/10.1063/5.0115673\">https://doi.org/10.1063/5.0115673</a>","mla":"Hegarty, Peter A., et al. “Tuning the Čerenkov Second Harmonic Contrast from Ferroelectric Domain Walls via Anomalous Dispersion.” <i>Journal of Applied Physics</i>, vol. 132, no. 21, AIP Publishing, 2022, p. 214102, doi:<a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>.","short":"P.A. Hegarty, L.M. Eng, M. Rüsing, Journal of Applied Physics 132 (2022) 214102.","bibtex":"@article{Hegarty_Eng_Rüsing_2022, title={Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion}, volume={132}, DOI={<a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>}, number={21}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Hegarty, Peter A. and Eng, Lukas M. and Rüsing, Michael}, year={2022}, pages={214102} }","ieee":"P. A. Hegarty, L. M. Eng, and M. Rüsing, “Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion,” <i>Journal of Applied Physics</i>, vol. 132, no. 21, p. 214102, 2022, doi: <a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>.","chicago":"Hegarty, Peter A., Lukas M. Eng, and Michael Rüsing. “Tuning the Čerenkov Second Harmonic Contrast from Ferroelectric Domain Walls via Anomalous Dispersion.” <i>Journal of Applied Physics</i> 132, no. 21 (2022): 214102. <a href=\"https://doi.org/10.1063/5.0115673\">https://doi.org/10.1063/5.0115673</a>.","ama":"Hegarty PA, Eng LM, Rüsing M. Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion. <i>Journal of Applied Physics</i>. 2022;132(21):214102. doi:<a href=\"https://doi.org/10.1063/5.0115673\">10.1063/5.0115673</a>"},"publication_identifier":{"issn":["0021-8979","1089-7550"]},"publication_status":"published","article_type":"original","extern":"1","funded_apc":"1","_id":"47988","user_id":"22501","status":"public","type":"journal_article","title":"Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls via anomalous dispersion","publisher":"AIP Publishing","date_created":"2023-10-11T08:57:55Z","year":"2022","quality_controlled":"1","issue":"21","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Second harmonic (SH) microscopy represents a powerful tool for the investigation of crystalline systems, such as ferroelectrics and their domain walls (DWs). Under the condition of normal dispersion, i.e., the refractive index at the SH wavelength is larger as compared to the refractive index at the fundamental wavelength, n(2ω)>n(ω), bulk crystals will generate no SH signal. Should the bulk, however, contain DWs, an appreciable SH signal will still be detectable at the location of DWs stemming from the Čerenkov mechanism. In this work, we demonstrate both how SH signals are generated in bulk media and how the Čerenkov mechanism can be inhibited by using anomalous dispersion, i.e., n(ω)<n(2ω). This allows us to quantitatively estimate the relative strength of the Čerenkov compared to other SH contrast mechanisms in DWs, such as the interference contrast. The results are in agreement with previous experiments based on the geometric separation of the signals. Due to the observed, strong Čerenkov contrast, such signal contributions may not be neglected in polarimetry studies of ferroelectric DWs in the future."}],"publication":"Journal of Applied Physics"},{"publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"citation":{"chicago":"Rix, Jan, Michael Rüsing, Roberta Galli, Jonas Golde, Sven Reitzig, Lukas M. Eng, and Edmund Koch. “Brillouin and Raman Imaging of Domain Walls in Periodically-Poled 5%-MgO:LiNbO3.” <i>Optics Express</i> 30, no. 4 (2022). <a href=\"https://doi.org/10.1364/oe.447554\">https://doi.org/10.1364/oe.447554</a>.","ieee":"J. Rix <i>et al.</i>, “Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3,” <i>Optics Express</i>, vol. 30, no. 4, Art. no. 5051, 2022, doi: <a href=\"https://doi.org/10.1364/oe.447554\">10.1364/oe.447554</a>.","ama":"Rix J, Rüsing M, Galli R, et al. Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3. <i>Optics Express</i>. 2022;30(4). doi:<a href=\"https://doi.org/10.1364/oe.447554\">10.1364/oe.447554</a>","apa":"Rix, J., Rüsing, M., Galli, R., Golde, J., Reitzig, S., Eng, L. M., &#38; Koch, E. (2022). Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3. <i>Optics Express</i>, <i>30</i>(4), Article 5051. <a href=\"https://doi.org/10.1364/oe.447554\">https://doi.org/10.1364/oe.447554</a>","bibtex":"@article{Rix_Rüsing_Galli_Golde_Reitzig_Eng_Koch_2022, title={Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3}, volume={30}, DOI={<a href=\"https://doi.org/10.1364/oe.447554\">10.1364/oe.447554</a>}, number={45051}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Rix, Jan and Rüsing, Michael and Galli, Roberta and Golde, Jonas and Reitzig, Sven and Eng, Lukas M. and Koch, Edmund}, year={2022} }","mla":"Rix, Jan, et al. “Brillouin and Raman Imaging of Domain Walls in Periodically-Poled 5%-MgO:LiNbO3.” <i>Optics Express</i>, vol. 30, no. 4, 5051, Optica Publishing Group, 2022, doi:<a href=\"https://doi.org/10.1364/oe.447554\">10.1364/oe.447554</a>.","short":"J. Rix, M. Rüsing, R. Galli, J. Golde, S. Reitzig, L.M. Eng, E. Koch, Optics Express 30 (2022)."},"intvolume":"        30","author":[{"full_name":"Rix, Jan","last_name":"Rix","first_name":"Jan"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Galli, Roberta","last_name":"Galli","first_name":"Roberta"},{"first_name":"Jonas","last_name":"Golde","full_name":"Golde, Jonas"},{"last_name":"Reitzig","full_name":"Reitzig, Sven","first_name":"Sven"},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"full_name":"Koch, Edmund","last_name":"Koch","first_name":"Edmund"}],"volume":30,"date_updated":"2023-10-11T08:46:57Z","doi":"10.1364/oe.447554","type":"journal_article","status":"public","user_id":"22501","_id":"47980","extern":"1","article_number":"5051","article_type":"original","issue":"4","quality_controlled":"1","year":"2022","date_created":"2023-10-11T08:46:35Z","publisher":"Optica Publishing Group","title":"Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3","publication":"Optics Express","abstract":[{"text":"Recently, ferroelectric domain walls (DWs) have attracted considerable attention due to their intrinsic topological effects and their huge potential for optoelectronic applications. In contrast, many of the underlying physical properties and phenomena are not well characterized. In this regard, analyzing the vibrational properties, e.g. by Raman spectroscopy, provides direct access to the various local material properties, such as strains, defects or electric fields. While the optical phonon spectra of DWs have been widely investigated in the past, no reports on the acoustic phonon properties of DWs exist. In this work, we present a joint Raman and Brillouin visualization of ferroelectric DWs in the model ferroelectric lithium niobate. This is possible by using a combined Raman and virtually imaged phased array Brillouin setup. Here, we show that DWs can be visualized via frequency shifts observed in the acoustic phonons, as well. The observed contrast then is qualitatively explained by models adapted from Raman spectroscopy. This work, hence, provides a novel route to study ferroelectric DWs and their intrinsic mechanical properties.","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["Atomic and Molecular Physics","and Optics"]},{"type":"conference","publication":"OSA Nonlinear Optics 2021","abstract":[{"lang":"eng","text":"<jats:p>We apply coherent anti-Stokes Raman scattering (CARS) for high-speed imaging of domain walls in lithium niobate. The domain wall signature provides similar spectral features as in spontaneous Raman spectroscopy, however at drastically increased scan speeds.</jats:p>"}],"status":"public","_id":"47971","user_id":"22501","extern":"1","language":[{"iso":"eng"}],"publication_status":"published","quality_controlled":"1","year":"2022","citation":{"short":"S. Reitzig, F. Hempel, M. Rüsing, L.M. Eng, in: OSA Nonlinear Optics 2021, Optica Publishing Group, 2022.","mla":"Reitzig, Sven, et al. “CARS Domain-Wall Analysis in Single-Crystalline Lithium Niobate.” <i>OSA Nonlinear Optics 2021</i>, Optica Publishing Group, 2022, doi:<a href=\"https://doi.org/10.1364/nlo.2021.nth3a.7\">10.1364/nlo.2021.nth3a.7</a>.","bibtex":"@inproceedings{Reitzig_Hempel_Rüsing_Eng_2022, title={CARS Domain-Wall Analysis in single-crystalline Lithium Niobate}, DOI={<a href=\"https://doi.org/10.1364/nlo.2021.nth3a.7\">10.1364/nlo.2021.nth3a.7</a>}, booktitle={OSA Nonlinear Optics 2021}, publisher={Optica Publishing Group}, author={Reitzig, Sven and Hempel, Franz and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","apa":"Reitzig, S., Hempel, F., Rüsing, M., &#38; Eng, L. M. (2022). CARS Domain-Wall Analysis in single-crystalline Lithium Niobate. <i>OSA Nonlinear Optics 2021</i>. OSA Nonlinear Optics 2021, Washington D.C., USA; Online. <a href=\"https://doi.org/10.1364/nlo.2021.nth3a.7\">https://doi.org/10.1364/nlo.2021.nth3a.7</a>","chicago":"Reitzig, Sven, Franz Hempel, Michael Rüsing, and Lukas M. Eng. “CARS Domain-Wall Analysis in Single-Crystalline Lithium Niobate.” In <i>OSA Nonlinear Optics 2021</i>. Optica Publishing Group, 2022. <a href=\"https://doi.org/10.1364/nlo.2021.nth3a.7\">https://doi.org/10.1364/nlo.2021.nth3a.7</a>.","ieee":"S. Reitzig, F. Hempel, M. Rüsing, and L. M. Eng, “CARS Domain-Wall Analysis in single-crystalline Lithium Niobate,” presented at the OSA Nonlinear Optics 2021, Washington D.C., USA; Online, 2022, doi: <a href=\"https://doi.org/10.1364/nlo.2021.nth3a.7\">10.1364/nlo.2021.nth3a.7</a>.","ama":"Reitzig S, Hempel F, Rüsing M, Eng LM. CARS Domain-Wall Analysis in single-crystalline Lithium Niobate. In: <i>OSA Nonlinear Optics 2021</i>. Optica Publishing Group; 2022. doi:<a href=\"https://doi.org/10.1364/nlo.2021.nth3a.7\">10.1364/nlo.2021.nth3a.7</a>"},"publisher":"Optica Publishing Group","date_updated":"2023-10-13T12:16:05Z","author":[{"first_name":"Sven","full_name":"Reitzig, Sven","last_name":"Reitzig"},{"last_name":"Hempel","full_name":"Hempel, Franz","first_name":"Franz"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."}],"date_created":"2023-10-11T08:27:34Z","title":"CARS Domain-Wall Analysis in single-crystalline Lithium Niobate","doi":"10.1364/nlo.2021.nth3a.7","conference":{"name":"OSA Nonlinear Optics 2021","start_date":"2021-8-9","end_date":"2021-8-13","location":"Washington D.C., USA; Online"}},{"quality_controlled":"1","publication_status":"published","citation":{"chicago":"Amber, Zeeshan H., Benjamin Kirbus, Michael Rüsing, and Lukas M. Eng. “Second-Harmonic Microscopy in Optically Confining Nanostructures.” In <i>OSA Nonlinear Optics 2021</i>. Optica Publishing Group, 2022. <a href=\"https://doi.org/10.1364/nlo.2021.nf1b.6\">https://doi.org/10.1364/nlo.2021.nf1b.6</a>.","ieee":"Z. H. Amber, B. Kirbus, M. Rüsing, and L. M. Eng, “Second-harmonic microscopy in optically confining nanostructures,” presented at the OSA Nonlinear Optics 2021, Washington D.C., USA; Online, 2022, doi: <a href=\"https://doi.org/10.1364/nlo.2021.nf1b.6\">10.1364/nlo.2021.nf1b.6</a>.","ama":"Amber ZH, Kirbus B, Rüsing M, Eng LM. Second-harmonic microscopy in optically confining nanostructures. In: <i>OSA Nonlinear Optics 2021</i>. Optica Publishing Group; 2022. doi:<a href=\"https://doi.org/10.1364/nlo.2021.nf1b.6\">10.1364/nlo.2021.nf1b.6</a>","mla":"Amber, Zeeshan H., et al. “Second-Harmonic Microscopy in Optically Confining Nanostructures.” <i>OSA Nonlinear Optics 2021</i>, Optica Publishing Group, 2022, doi:<a href=\"https://doi.org/10.1364/nlo.2021.nf1b.6\">10.1364/nlo.2021.nf1b.6</a>.","short":"Z.H. Amber, B. Kirbus, M. Rüsing, L.M. Eng, in: OSA Nonlinear Optics 2021, Optica Publishing Group, 2022.","bibtex":"@inproceedings{Amber_Kirbus_Rüsing_Eng_2022, title={Second-harmonic microscopy in optically confining nanostructures}, DOI={<a href=\"https://doi.org/10.1364/nlo.2021.nf1b.6\">10.1364/nlo.2021.nf1b.6</a>}, booktitle={OSA Nonlinear Optics 2021}, publisher={Optica Publishing Group}, author={Amber, Zeeshan H. and Kirbus, Benjamin and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","apa":"Amber, Z. H., Kirbus, B., Rüsing, M., &#38; Eng, L. M. (2022). Second-harmonic microscopy in optically confining nanostructures. <i>OSA Nonlinear Optics 2021</i>. OSA Nonlinear Optics 2021, Washington D.C., USA; Online. <a href=\"https://doi.org/10.1364/nlo.2021.nf1b.6\">https://doi.org/10.1364/nlo.2021.nf1b.6</a>"},"year":"2022","date_created":"2023-10-11T08:24:55Z","author":[{"last_name":"Amber","full_name":"Amber, Zeeshan H.","first_name":"Zeeshan H."},{"first_name":"Benjamin","full_name":"Kirbus, Benjamin","last_name":"Kirbus"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."}],"date_updated":"2023-10-13T12:18:48Z","publisher":"Optica Publishing Group","doi":"10.1364/nlo.2021.nf1b.6","conference":{"location":"Washington D.C., USA; Online","end_date":"2021-8-13","start_date":"2021-8-9","name":"OSA Nonlinear Optics 2021"},"title":"Second-harmonic microscopy in optically confining nanostructures","publication":"OSA Nonlinear Optics 2021","type":"conference","status":"public","abstract":[{"text":"<jats:p>The influence of geometrical confinement in back-reflection Second-Harmonic microscopy is experimentally and theoretically investigated in the wedge-shaped model system lithium niobate. The co-propagating signal is found to be the dominating contribution.</jats:p>","lang":"eng"}],"user_id":"22501","_id":"47969","language":[{"iso":"eng"}]},{"_id":"47970","user_id":"22501","language":[{"iso":"eng"}],"publication":"OSA Nonlinear Optics 2021","type":"conference","abstract":[{"lang":"eng","text":"We apply broadband coherent anti-Stokes Raman scattering, an imaging tech- nique mostly applied in biology, to the solid state system lithium niobate, where we show an enhanced full spectrum and a working signal transformation."}],"status":"public","publisher":"Optica Publishing Group","date_updated":"2023-10-13T12:16:11Z","author":[{"last_name":"Hempel","full_name":"Hempel, Franz","first_name":"Franz"},{"first_name":"Sven","full_name":"Reitzig, Sven","last_name":"Reitzig"},{"first_name":"Michael","id":"22501","full_name":"Rüsing, Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577"},{"last_name":"Eng","full_name":"Eng, Lukas M.","first_name":"Lukas M."}],"date_created":"2023-10-11T08:26:05Z","title":"Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems","doi":"10.1364/nlo.2021.nf2b.6","conference":{"end_date":"2021-8-13","location":"Washington D.C., USA; Online","name":"OSA Nonlinear Optics 2021","start_date":"2021-8-9"},"quality_controlled":"1","publication_status":"published","year":"2022","citation":{"apa":"Hempel, F., Reitzig, S., Rüsing, M., &#38; Eng, L. M. (2022). Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems. <i>OSA Nonlinear Optics 2021</i>. OSA Nonlinear Optics 2021, Washington D.C., USA; Online. <a href=\"https://doi.org/10.1364/nlo.2021.nf2b.6\">https://doi.org/10.1364/nlo.2021.nf2b.6</a>","short":"F. Hempel, S. Reitzig, M. Rüsing, L.M. Eng, in: OSA Nonlinear Optics 2021, Optica Publishing Group, 2022.","mla":"Hempel, Franz, et al. “Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems.” <i>OSA Nonlinear Optics 2021</i>, Optica Publishing Group, 2022, doi:<a href=\"https://doi.org/10.1364/nlo.2021.nf2b.6\">10.1364/nlo.2021.nf2b.6</a>.","bibtex":"@inproceedings{Hempel_Reitzig_Rüsing_Eng_2022, title={Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems}, DOI={<a href=\"https://doi.org/10.1364/nlo.2021.nf2b.6\">10.1364/nlo.2021.nf2b.6</a>}, booktitle={OSA Nonlinear Optics 2021}, publisher={Optica Publishing Group}, author={Hempel, Franz and Reitzig, Sven and Rüsing, Michael and Eng, Lukas M.}, year={2022} }","ama":"Hempel F, Reitzig S, Rüsing M, Eng LM. Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems. In: <i>OSA Nonlinear Optics 2021</i>. Optica Publishing Group; 2022. doi:<a href=\"https://doi.org/10.1364/nlo.2021.nf2b.6\">10.1364/nlo.2021.nf2b.6</a>","ieee":"F. Hempel, S. Reitzig, M. Rüsing, and L. M. Eng, “Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems,” presented at the OSA Nonlinear Optics 2021, Washington D.C., USA; Online, 2022, doi: <a href=\"https://doi.org/10.1364/nlo.2021.nf2b.6\">10.1364/nlo.2021.nf2b.6</a>.","chicago":"Hempel, Franz, Sven Reitzig, Michael Rüsing, and Lukas M. Eng. “Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems.” In <i>OSA Nonlinear Optics 2021</i>. Optica Publishing Group, 2022. <a href=\"https://doi.org/10.1364/nlo.2021.nf2b.6\">https://doi.org/10.1364/nlo.2021.nf2b.6</a>."}}]