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Wilhelm Fink; 2020. doi:<a href=\"https://doi.org/10.30965/9783846764954_004\">10.30965/9783846764954_004</a>","mla":"Althoff, Sebastian, et al. “Editorial: Re/Dissolving Mimesis.” <i>Re/Dissolving Mimesis</i>, edited by Elisa Linseisen et al., Wilhelm Fink, 2020, doi:<a href=\"https://doi.org/10.30965/9783846764954_004\">10.30965/9783846764954_004</a>.","short":"S. Althoff, E. Linseisen, M.-L. Müller, F. Winter, in: E. Linseisen, M.-L. Müller, F. Winter (Eds.), Re/Dissolving Mimesis, Wilhelm Fink, Paderborn, 2020.","bibtex":"@inbook{Althoff_Linseisen_Müller_Winter_2020, place={Paderborn}, title={Editorial: Re/Dissolving Mimesis}, DOI={<a href=\"https://doi.org/10.30965/9783846764954_004\">10.30965/9783846764954_004</a>}, booktitle={Re/Dissolving Mimesis}, publisher={Wilhelm Fink}, author={Althoff, Sebastian and Linseisen, Elisa and Müller, Maja-Lisa and Winter, Franziska}, editor={Linseisen, Elisa and Müller, Maja-Lisa and Winter, Franziska}, year={2020} }","apa":"Althoff, S., Linseisen, E., Müller, M.-L., &#38; Winter, F. (2020). Editorial: Re/Dissolving Mimesis. In E. Linseisen, M.-L. Müller, &#38; F. Winter (Eds.), <i>Re/Dissolving Mimesis</i>. Wilhelm Fink. <a href=\"https://doi.org/10.30965/9783846764954_004\">https://doi.org/10.30965/9783846764954_004</a>"},"publication_status":"published","title":"Editorial: Re/Dissolving Mimesis","doi":"10.30965/9783846764954_004","date_updated":"2023-10-05T00:06:49Z","publisher":"Wilhelm Fink","author":[{"first_name":"Sebastian","full_name":"Althoff, Sebastian","id":"89772","last_name":"Althoff"},{"full_name":"Linseisen, Elisa","last_name":"Linseisen","first_name":"Elisa"},{"last_name":"Müller","full_name":"Müller, Maja-Lisa","first_name":"Maja-Lisa"},{"full_name":"Winter, Franziska","last_name":"Winter","first_name":"Franziska"}],"date_created":"2023-10-05T00:06:33Z"},{"publication":"Performance Research","type":"journal_article","status":"public","department":[{"_id":"757"}],"user_id":"49063","_id":"47624","language":[{"iso":"eng"}],"extern":"1","issue":"7","publication_status":"published","intvolume":"        24","page":"92-98","citation":{"chicago":"Althoff, Sebastian. “Seeping Out: The Diminishment of the Subject in Hito Steyerl’s How Not to Be Seen.” <i>Performance Research</i> 24, no. 7 (2020): 92–98. <a href=\"https://doi.org/10.1080/13528165.2019.1717871\">https://doi.org/10.1080/13528165.2019.1717871</a>.","ieee":"S. Althoff, “Seeping Out: The diminishment of the subject in Hito Steyerl’s How Not to Be Seen,” <i>Performance Research</i>, vol. 24, no. 7, pp. 92–98, 2020, doi: <a href=\"https://doi.org/10.1080/13528165.2019.1717871\">10.1080/13528165.2019.1717871</a>.","ama":"Althoff S. Seeping Out: The diminishment of the subject in Hito Steyerl’s How Not to Be Seen. <i>Performance Research</i>. 2020;24(7):92-98. doi:<a href=\"https://doi.org/10.1080/13528165.2019.1717871\">10.1080/13528165.2019.1717871</a>","mla":"Althoff, Sebastian. “Seeping Out: The Diminishment of the Subject in Hito Steyerl’s How Not to Be Seen.” <i>Performance Research</i>, vol. 24, no. 7, 2020, pp. 92–98, doi:<a href=\"https://doi.org/10.1080/13528165.2019.1717871\">10.1080/13528165.2019.1717871</a>.","bibtex":"@article{Althoff_2020, title={Seeping Out: The diminishment of the subject in Hito Steyerl’s How Not to Be Seen}, volume={24}, DOI={<a href=\"https://doi.org/10.1080/13528165.2019.1717871\">10.1080/13528165.2019.1717871</a>}, number={7}, journal={Performance Research}, author={Althoff, Sebastian}, year={2020}, pages={92–98} }","short":"S. Althoff, Performance Research 24 (2020) 92–98.","apa":"Althoff, S. (2020). Seeping Out: The diminishment of the subject in Hito Steyerl’s How Not to Be Seen. <i>Performance Research</i>, <i>24</i>(7), 92–98. <a href=\"https://doi.org/10.1080/13528165.2019.1717871\">https://doi.org/10.1080/13528165.2019.1717871</a>"},"year":"2020","volume":24,"date_created":"2023-10-05T00:09:17Z","author":[{"first_name":"Sebastian","full_name":"Althoff, Sebastian","id":"89772","last_name":"Althoff"}],"date_updated":"2023-10-05T00:11:16Z","doi":"10.1080/13528165.2019.1717871","title":"Seeping Out: The diminishment of the subject in Hito Steyerl’s How Not to Be Seen"},{"publication_status":"published","citation":{"ieee":"S. Gharibian, S. Piddock, and J. Yirka, “Oracle complexity classes and local measurements on physical  Hamiltonians,” in <i>Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)</i>, 2020, p. 38.","chicago":"Gharibian, Sevag, Stephen Piddock, and Justin Yirka. “Oracle Complexity Classes and Local Measurements on Physical  Hamiltonians.” In <i>Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)</i>, 38, 2020.","ama":"Gharibian S, Piddock S, Yirka J. Oracle complexity classes and local measurements on physical  Hamiltonians. In: <i>Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)</i>. ; 2020:38.","apa":"Gharibian, S., Piddock, S., &#38; Yirka, J. (2020). Oracle complexity classes and local measurements on physical  Hamiltonians. <i>Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)</i>, 38.","bibtex":"@inproceedings{Gharibian_Piddock_Yirka_2020, title={Oracle complexity classes and local measurements on physical  Hamiltonians}, booktitle={Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)}, author={Gharibian, Sevag and Piddock, Stephen and Yirka, Justin}, year={2020}, pages={38} }","mla":"Gharibian, Sevag, et al. “Oracle Complexity Classes and Local Measurements on Physical  Hamiltonians.” <i>Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)</i>, 2020, p. 38.","short":"S. Gharibian, S. Piddock, J. Yirka, in: Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020), 2020, p. 38."},"page":"38","year":"2020","date_created":"2019-09-16T07:41:31Z","author":[{"first_name":"Sevag","full_name":"Gharibian, Sevag","id":"71541","orcid":"0000-0002-9992-3379","last_name":"Gharibian"},{"first_name":"Stephen","last_name":"Piddock","full_name":"Piddock, Stephen"},{"last_name":"Yirka","full_name":"Yirka, Justin","first_name":"Justin"}],"oa":"1","date_updated":"2023-10-09T04:17:41Z","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1909.05981"}],"title":"Oracle complexity classes and local measurements on physical  Hamiltonians","type":"conference","publication":"Proceedings of the 37th Symposium on Theoretical Aspects of Computer Science (STACS 2020)","status":"public","abstract":[{"text":"The canonical problem for the class Quantum Merlin-Arthur (QMA) is that of\r\nestimating ground state energies of local Hamiltonians. Perhaps surprisingly,\r\n[Ambainis, CCC 2014] showed that the related, but arguably more natural,\r\nproblem of simulating local measurements on ground states of local Hamiltonians\r\n(APX-SIM) is likely harder than QMA. Indeed, [Ambainis, CCC 2014] showed that\r\nAPX-SIM is P^QMA[log]-complete, for P^QMA[log] the class of languages decidable\r\nby a P machine making a logarithmic number of adaptive queries to a QMA oracle.\r\nIn this work, we show that APX-SIM is P^QMA[log]-complete even when restricted\r\nto more physical Hamiltonians, obtaining as intermediate steps a variety of\r\nrelated complexity-theoretic results.\r\n  We first give a sequence of results which together yield P^QMA[log]-hardness\r\nfor APX-SIM on well-motivated Hamiltonians: (1) We show that for NP, StoqMA,\r\nand QMA oracles, a logarithmic number of adaptive queries is equivalent to\r\npolynomially many parallel queries. These equalities simplify the proofs of our\r\nsubsequent results. (2) Next, we show that the hardness of APX-SIM is preserved\r\nunder Hamiltonian simulations (a la [Cubitt, Montanaro, Piddock, 2017]). As a\r\nbyproduct, we obtain a full complexity classification of APX-SIM, showing it is\r\ncomplete for P, P^||NP, P^||StoqMA, or P^||QMA depending on the Hamiltonians\r\nemployed. (3) Leveraging the above, we show that APX-SIM is P^QMA[log]-complete\r\nfor any family of Hamiltonians which can efficiently simulate spatially sparse\r\nHamiltonians, including physically motivated models such as the 2D Heisenberg\r\nmodel.\r\n  Our second focus considers 1D systems: We show that APX-SIM remains\r\nP^QMA[log]-complete even for local Hamiltonians on a 1D line of 8-dimensional\r\nqudits. This uses a number of ideas from above, along with replacing the \"query\r\nHamiltonian\" of [Ambainis, CCC 2014] with a new \"sifter\" construction.","lang":"eng"}],"user_id":"71541","department":[{"_id":"623"},{"_id":"7"}],"external_id":{"arxiv":["1909.05981"]},"_id":"13226","language":[{"iso":"eng"}]},{"year":"2020","citation":{"ama":"Spychala KJ, Mackwitz P, Rüsing M, et al. Nonlinear focal mapping of ferroelectric domain walls in LiNbO3: Analysis of the SHG microscopy contrast mechanism. <i>Journal of Applied Physics</i>. Published online 2020. doi:<a href=\"https://doi.org/10.1063/5.0025284\">10.1063/5.0025284</a>","ieee":"K. J. Spychala <i>et al.</i>, “Nonlinear focal mapping of ferroelectric domain walls in LiNbO3: Analysis of the SHG microscopy contrast mechanism,” <i>Journal of Applied Physics</i>, Art. no. 234102, 2020, doi: <a href=\"https://doi.org/10.1063/5.0025284\">10.1063/5.0025284</a>.","chicago":"Spychala, K. J., P. Mackwitz, Michael Rüsing, A. Widhalm, Gerhard Berth, Christine Silberhorn, and Artur Zrenner. “Nonlinear Focal Mapping of Ferroelectric Domain Walls in LiNbO3: Analysis of the SHG Microscopy Contrast Mechanism.” <i>Journal of Applied Physics</i>, 2020. <a href=\"https://doi.org/10.1063/5.0025284\">https://doi.org/10.1063/5.0025284</a>.","mla":"Spychala, K. J., et al. “Nonlinear Focal Mapping of Ferroelectric Domain Walls in LiNbO3: Analysis of the SHG Microscopy Contrast Mechanism.” <i>Journal of Applied Physics</i>, 234102, 2020, doi:<a href=\"https://doi.org/10.1063/5.0025284\">10.1063/5.0025284</a>.","short":"K.J. Spychala, P. Mackwitz, M. Rüsing, A. Widhalm, G. Berth, C. Silberhorn, A. Zrenner, Journal of Applied Physics (2020).","bibtex":"@article{Spychala_Mackwitz_Rüsing_Widhalm_Berth_Silberhorn_Zrenner_2020, title={Nonlinear focal mapping of ferroelectric domain walls in LiNbO3: Analysis of the SHG microscopy contrast mechanism}, DOI={<a href=\"https://doi.org/10.1063/5.0025284\">10.1063/5.0025284</a>}, number={234102}, journal={Journal of Applied Physics}, author={Spychala, K. J. and Mackwitz, P. and Rüsing, Michael and Widhalm, A. and Berth, Gerhard and Silberhorn, Christine and Zrenner, Artur}, year={2020} }","apa":"Spychala, K. J., Mackwitz, P., Rüsing, M., Widhalm, A., Berth, G., Silberhorn, C., &#38; Zrenner, A. (2020). Nonlinear focal mapping of ferroelectric domain walls in LiNbO3: Analysis of the SHG microscopy contrast mechanism. <i>Journal of Applied Physics</i>, Article 234102. <a href=\"https://doi.org/10.1063/5.0025284\">https://doi.org/10.1063/5.0025284</a>"},"publication_status":"published","publication_identifier":{"issn":["0021-8979","1089-7550"]},"title":"Nonlinear focal mapping of ferroelectric domain walls in LiNbO3: Analysis of the SHG microscopy contrast mechanism","doi":"10.1063/5.0025284","date_updated":"2023-10-09T08:07:57Z","date_created":"2021-05-09T06:33:08Z","author":[{"first_name":"K. J.","full_name":"Spychala, K. J.","last_name":"Spychala"},{"full_name":"Mackwitz, P.","last_name":"Mackwitz","first_name":"P."},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Widhalm, A.","last_name":"Widhalm","first_name":"A."},{"first_name":"Gerhard","id":"53","full_name":"Berth, Gerhard","last_name":"Berth"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"last_name":"Zrenner","orcid":"0000-0002-5190-0944","id":"606","full_name":"Zrenner, Artur","first_name":"Artur"}],"status":"public","type":"journal_article","publication":"Journal of Applied Physics","article_number":"234102","language":[{"iso":"eng"}],"_id":"22056","user_id":"14931","department":[{"_id":"15"},{"_id":"230"}]},{"status":"public","publication":"Optics Express","type":"journal_article","language":[{"iso":"eng"}],"article_number":"24353","department":[{"_id":"15"},{"_id":"288"}],"user_id":"14931","_id":"25920","project":[{"name":"TRR 142 - Project Area B","_id":"55"}],"citation":{"ama":"Padberg L, Santandrea M, Rüsing M, et al. Characterisation of width-dependent diffusion dynamics in rubidium-exchanged KTP waveguides. <i>Optics Express</i>. Published online 2020. doi:<a href=\"https://doi.org/10.1364/oe.397074\">10.1364/oe.397074</a>","ieee":"L. Padberg <i>et al.</i>, “Characterisation of width-dependent diffusion dynamics in rubidium-exchanged KTP waveguides,” <i>Optics Express</i>, Art. no. 24353, 2020, doi: <a href=\"https://doi.org/10.1364/oe.397074\">10.1364/oe.397074</a>.","chicago":"Padberg, Laura, Matteo Santandrea, Michael Rüsing, Julian Brockmeier, Peter Mackwitz, Gerhard Berth, Artur Zrenner, Christof Eigner, and Christine Silberhorn. “Characterisation of Width-Dependent Diffusion Dynamics in Rubidium-Exchanged KTP Waveguides.” <i>Optics Express</i>, 2020. <a href=\"https://doi.org/10.1364/oe.397074\">https://doi.org/10.1364/oe.397074</a>.","bibtex":"@article{Padberg_Santandrea_Rüsing_Brockmeier_Mackwitz_Berth_Zrenner_Eigner_Silberhorn_2020, title={Characterisation of width-dependent diffusion dynamics in rubidium-exchanged KTP waveguides}, DOI={<a href=\"https://doi.org/10.1364/oe.397074\">10.1364/oe.397074</a>}, number={24353}, journal={Optics Express}, author={Padberg, Laura and Santandrea, Matteo and Rüsing, Michael and Brockmeier, Julian and Mackwitz, Peter and Berth, Gerhard and Zrenner, Artur and Eigner, Christof and Silberhorn, Christine}, year={2020} }","short":"L. Padberg, M. Santandrea, M. Rüsing, J. Brockmeier, P. Mackwitz, G. Berth, A. Zrenner, C. Eigner, C. Silberhorn, Optics Express (2020).","mla":"Padberg, Laura, et al. “Characterisation of Width-Dependent Diffusion Dynamics in Rubidium-Exchanged KTP Waveguides.” <i>Optics Express</i>, 24353, 2020, doi:<a href=\"https://doi.org/10.1364/oe.397074\">10.1364/oe.397074</a>.","apa":"Padberg, L., Santandrea, M., Rüsing, M., Brockmeier, J., Mackwitz, P., Berth, G., Zrenner, A., Eigner, C., &#38; Silberhorn, C. (2020). Characterisation of width-dependent diffusion dynamics in rubidium-exchanged KTP waveguides. <i>Optics Express</i>, Article 24353. <a href=\"https://doi.org/10.1364/oe.397074\">https://doi.org/10.1364/oe.397074</a>"},"year":"2020","publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","doi":"10.1364/oe.397074","title":"Characterisation of width-dependent diffusion dynamics in rubidium-exchanged KTP waveguides","author":[{"last_name":"Padberg","id":"40300","full_name":"Padberg, Laura","first_name":"Laura"},{"first_name":"Matteo","id":"55095","full_name":"Santandrea, Matteo","last_name":"Santandrea","orcid":"0000-0001-5718-358X"},{"id":"22501","full_name":"Rüsing, Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael"},{"last_name":"Brockmeier","id":"44807","full_name":"Brockmeier, Julian","first_name":"Julian"},{"first_name":"Peter","last_name":"Mackwitz","full_name":"Mackwitz, Peter"},{"first_name":"Gerhard","last_name":"Berth","id":"53","full_name":"Berth, Gerhard"},{"orcid":"0000-0002-5190-0944","last_name":"Zrenner","full_name":"Zrenner, Artur","id":"606","first_name":"Artur"},{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof","first_name":"Christof"},{"first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn"}],"date_created":"2021-10-08T11:12:36Z","date_updated":"2023-10-09T08:27:41Z"},{"user_id":"22501","_id":"47956","article_type":"original","article_number":"2000857","type":"journal_article","status":"public","author":[{"last_name":"Tan","full_name":"Tan, Deming","first_name":"Deming"},{"full_name":"Kirbus, Benjamin","last_name":"Kirbus","first_name":"Benjamin"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","id":"22501","full_name":"Rüsing, Michael"},{"first_name":"Tobias","full_name":"Pietsch, Tobias","last_name":"Pietsch"},{"full_name":"Ruck, Michael","last_name":"Ruck","first_name":"Michael"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."}],"volume":16,"date_updated":"2023-10-11T08:09:29Z","doi":"10.1002/smll.202000857","publication_status":"published","publication_identifier":{"issn":["1613-6810","1613-6829"]},"citation":{"ieee":"D. Tan, B. Kirbus, M. Rüsing, T. Pietsch, M. Ruck, and L. M. Eng, “Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation,” <i>Small</i>, vol. 16, no. 23, Art. no. 2000857, 2020, doi: <a href=\"https://doi.org/10.1002/smll.202000857\">10.1002/smll.202000857</a>.","chicago":"Tan, Deming, Benjamin Kirbus, Michael Rüsing, Tobias Pietsch, Michael Ruck, and Lukas M. Eng. “Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation.” <i>Small</i> 16, no. 23 (2020). <a href=\"https://doi.org/10.1002/smll.202000857\">https://doi.org/10.1002/smll.202000857</a>.","ama":"Tan D, Kirbus B, Rüsing M, Pietsch T, Ruck M, Eng LM. Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation. <i>Small</i>. 2020;16(23). doi:<a href=\"https://doi.org/10.1002/smll.202000857\">10.1002/smll.202000857</a>","apa":"Tan, D., Kirbus, B., Rüsing, M., Pietsch, T., Ruck, M., &#38; Eng, L. M. (2020). Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation. <i>Small</i>, <i>16</i>(23), Article 2000857. <a href=\"https://doi.org/10.1002/smll.202000857\">https://doi.org/10.1002/smll.202000857</a>","short":"D. Tan, B. Kirbus, M. Rüsing, T. Pietsch, M. Ruck, L.M. Eng, Small 16 (2020).","bibtex":"@article{Tan_Kirbus_Rüsing_Pietsch_Ruck_Eng_2020, title={Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation}, volume={16}, DOI={<a href=\"https://doi.org/10.1002/smll.202000857\">10.1002/smll.202000857</a>}, number={232000857}, journal={Small}, publisher={Wiley}, author={Tan, Deming and Kirbus, Benjamin and Rüsing, Michael and Pietsch, Tobias and Ruck, Michael and Eng, Lukas M.}, year={2020} }","mla":"Tan, Deming, et al. “Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation.” <i>Small</i>, vol. 16, no. 23, 2000857, Wiley, 2020, doi:<a href=\"https://doi.org/10.1002/smll.202000857\">10.1002/smll.202000857</a>."},"intvolume":"        16","language":[{"iso":"eng"}],"keyword":["Biomaterials","Biotechnology","General Materials Science","General Chemistry"],"publication":"Small","abstract":[{"lang":"eng","text":"Optically nonlinear Pb2B5O9X (X = Cl, Br) borate halides are an important group of materials for second harmonic generation (SHG). Additionally, they also possess excellent photocatalytic activity and stability in the process of dechlorination of chlorophenols, which are typical persistent organic pollutants. It would be of great interest to conduct in situ (photo‐) catalysis investigations during the whole photocatalytic process by SHG when considering them as photocatalytic materials. In order to get superior photocatalytic efficiency and maximum surface information, small particles are highly desired. Here, a low‐cost and fast synthesis route that allows growing microcrystalline optically nonlinear Pb<jats:sub>2</jats:sub>B<jats:sub>5</jats:sub>O<jats:sub>9</jats:sub>X borate halides at large quantities is introduced. When applying the ionothermal growth process at temperatures between 130 and 170 °C, microcrystallites with an average size of about 1 µm precipitate with an orthorhombic hilgardite‐like borate halide structure. Thorough examinations using powder X‐ray diffraction and scanning electron microscopy, the Pb2B5O9X microcrystals are indicated to be chemically pure and single‐phased. Besides, the Pb2B5O9X borate halides' SHG efficiencies are confirmed using confocal SHG microscopy. The low‐temperature synthesis route thus makes these borate halides a highly desirable material for surface studies such as monitoring chemical reactions with picosecond time resolution and in situ (photo‐) catalysis investigations.</jats:p>"}],"date_created":"2023-10-11T08:07:50Z","publisher":"Wiley","title":"Resource‐Efficient Low‐Temperature Synthesis of Microcrystalline Pb2B5O9X (X = Cl, Br) for Surfaces Studies by Optical Second Harmonic Generation","issue":"23","quality_controlled":"1","year":"2020"},{"year":"2020","issue":"13","title":"Shallow-etched thin-film lithium niobate waveguides for highly-efficient second-harmonic generation","date_created":"2023-10-11T08:09:52Z","publisher":"Optica Publishing Group","abstract":[{"text":"High-fidelity periodic poling over long lengths is required for robust, quasi-phase-matched second-harmonic generation using the fundamental, quasi-TE polarized waveguide modes in a thin-film lithium niobate (TFLN) waveguide. Here, a shallow-etched ridge waveguide is fabricated in x-cut magnesium oxide doped TFLN and is poled accurately over 5 mm. The high fidelity of the poling is demonstrated over long lengths using a non-destructive technique of confocal scanning second-harmonic microscopy. We report a second-harmonic conversion efficiency of up to 939 %/W (length-normalized conversion efficiency 3757 %/Wcm²), measured at telecommunications wavelengths. The device demonstrates a narrow spectral linewidth (1 nm) and can be tuned precisely with a tuning characteristic of 0.1 nm/°C, over at least 40 °C without measurable loss of efficiency.","lang":"eng"}],"publication":"Optics Express","language":[{"iso":"eng"}],"keyword":["Atomic and Molecular Physics","and Optics"],"intvolume":"        28","citation":{"chicago":"Zhao, Jie, Michael Rüsing, Usman A. Javid, Jingwei Ling, Mingxiao Li, Qiang Lin, and Shayan Mookherjea. “Shallow-Etched Thin-Film Lithium Niobate Waveguides for Highly-Efficient Second-Harmonic Generation.” <i>Optics Express</i> 28, no. 13 (2020). <a href=\"https://doi.org/10.1364/oe.395545\">https://doi.org/10.1364/oe.395545</a>.","ieee":"J. Zhao <i>et al.</i>, “Shallow-etched thin-film lithium niobate waveguides for highly-efficient second-harmonic generation,” <i>Optics Express</i>, vol. 28, no. 13, Art. no. 19669, 2020, doi: <a href=\"https://doi.org/10.1364/oe.395545\">10.1364/oe.395545</a>.","ama":"Zhao J, Rüsing M, Javid UA, et al. Shallow-etched thin-film lithium niobate waveguides for highly-efficient second-harmonic generation. <i>Optics Express</i>. 2020;28(13). doi:<a href=\"https://doi.org/10.1364/oe.395545\">10.1364/oe.395545</a>","apa":"Zhao, J., Rüsing, M., Javid, U. A., Ling, J., Li, M., Lin, Q., &#38; Mookherjea, S. (2020). Shallow-etched thin-film lithium niobate waveguides for highly-efficient second-harmonic generation. <i>Optics Express</i>, <i>28</i>(13), Article 19669. <a href=\"https://doi.org/10.1364/oe.395545\">https://doi.org/10.1364/oe.395545</a>","short":"J. Zhao, M. Rüsing, U.A. Javid, J. Ling, M. Li, Q. Lin, S. Mookherjea, Optics Express 28 (2020).","mla":"Zhao, Jie, et al. “Shallow-Etched Thin-Film Lithium Niobate Waveguides for Highly-Efficient Second-Harmonic Generation.” <i>Optics Express</i>, vol. 28, no. 13, 19669, Optica Publishing Group, 2020, doi:<a href=\"https://doi.org/10.1364/oe.395545\">10.1364/oe.395545</a>.","bibtex":"@article{Zhao_Rüsing_Javid_Ling_Li_Lin_Mookherjea_2020, title={Shallow-etched thin-film lithium niobate waveguides for highly-efficient second-harmonic generation}, volume={28}, DOI={<a href=\"https://doi.org/10.1364/oe.395545\">10.1364/oe.395545</a>}, number={1319669}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Zhao, Jie and Rüsing, Michael and Javid, Usman A. and Ling, Jingwei and Li, Mingxiao and Lin, Qiang and Mookherjea, Shayan}, year={2020} }"},"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","doi":"10.1364/oe.395545","volume":28,"author":[{"first_name":"Jie","last_name":"Zhao","full_name":"Zhao, Jie"},{"id":"22501","full_name":"Rüsing, Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","first_name":"Michael"},{"full_name":"Javid, Usman A.","last_name":"Javid","first_name":"Usman A."},{"first_name":"Jingwei","last_name":"Ling","full_name":"Ling, Jingwei"},{"first_name":"Mingxiao","full_name":"Li, Mingxiao","last_name":"Li"},{"full_name":"Lin, Qiang","last_name":"Lin","first_name":"Qiang"},{"full_name":"Mookherjea, Shayan","last_name":"Mookherjea","first_name":"Shayan"}],"date_updated":"2023-10-11T08:11:08Z","status":"public","type":"journal_article","extern":"1","article_number":"19669","article_type":"original","user_id":"22501","_id":"47958"},{"_id":"47955","user_id":"22501","article_type":"original","article_number":"193104","type":"journal_article","status":"public","date_updated":"2023-10-11T08:07:28Z","author":[{"last_name":"Zhao","full_name":"Zhao, Jie","first_name":"Jie"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael","id":"22501"},{"first_name":"Matthias","full_name":"Roeper, Matthias","last_name":"Roeper"},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"last_name":"Mookherjea","full_name":"Mookherjea, Shayan","first_name":"Shayan"}],"volume":127,"doi":"10.1063/1.5143266","publication_status":"published","publication_identifier":{"issn":["0021-8979","1089-7550"]},"citation":{"apa":"Zhao, J., Rüsing, M., Roeper, M., Eng, L. M., &#38; Mookherjea, S. (2020). Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity. <i>Journal of Applied Physics</i>, <i>127</i>(19), Article 193104. <a href=\"https://doi.org/10.1063/1.5143266\">https://doi.org/10.1063/1.5143266</a>","mla":"Zhao, Jie, et al. “Poling Thin-Film x-Cut Lithium Niobate for Quasi-Phase Matching with Sub-Micrometer Periodicity.” <i>Journal of Applied Physics</i>, vol. 127, no. 19, 193104, AIP Publishing, 2020, doi:<a href=\"https://doi.org/10.1063/1.5143266\">10.1063/1.5143266</a>.","bibtex":"@article{Zhao_Rüsing_Roeper_Eng_Mookherjea_2020, title={Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity}, volume={127}, DOI={<a href=\"https://doi.org/10.1063/1.5143266\">10.1063/1.5143266</a>}, number={19193104}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Zhao, Jie and Rüsing, Michael and Roeper, Matthias and Eng, Lukas M. and Mookherjea, Shayan}, year={2020} }","short":"J. Zhao, M. Rüsing, M. Roeper, L.M. Eng, S. Mookherjea, Journal of Applied Physics 127 (2020).","ieee":"J. Zhao, M. Rüsing, M. Roeper, L. M. Eng, and S. Mookherjea, “Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity,” <i>Journal of Applied Physics</i>, vol. 127, no. 19, Art. no. 193104, 2020, doi: <a href=\"https://doi.org/10.1063/1.5143266\">10.1063/1.5143266</a>.","chicago":"Zhao, Jie, Michael Rüsing, Matthias Roeper, Lukas M. Eng, and Shayan Mookherjea. “Poling Thin-Film x-Cut Lithium Niobate for Quasi-Phase Matching with Sub-Micrometer Periodicity.” <i>Journal of Applied Physics</i> 127, no. 19 (2020). <a href=\"https://doi.org/10.1063/1.5143266\">https://doi.org/10.1063/1.5143266</a>.","ama":"Zhao J, Rüsing M, Roeper M, Eng LM, Mookherjea S. Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity. <i>Journal of Applied Physics</i>. 2020;127(19). doi:<a href=\"https://doi.org/10.1063/1.5143266\">10.1063/1.5143266</a>"},"intvolume":"       127","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}],"publication":"Journal of Applied Physics","abstract":[{"lang":"eng","text":"Quasi-phase-matched grating structures in lithium niobate waveguides with sub-micrometer periodicities will benefit the development of short-wavelength nonlinear optical devices. Here, we report on the reproducible formation of periodically poled domains in x-cut single-crystalline thin-film lithium niobate with periodicities as short as 600 nm. Shaped single-voltage poling pulses were applied to electrode structures that were fabricated by a combination of electron-beam and direct-writing laser lithography. Evidence of successful poling with good quality was obtained through second-harmonic microscopy and piezoresponse force microscopy imaging. For the sub-micrometer period structures, we observed patterns with a double periodicity formed by domain interactions and features with sizes <200 nm."}],"publisher":"AIP Publishing","date_created":"2023-10-11T08:06:39Z","title":"Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity","issue":"19","year":"2020"},{"issue":"16","publication_identifier":{"issn":["0031-9007","1079-7114"]},"publication_status":"published","intvolume":"       124","citation":{"apa":"Zhao, J., Ma, C., Rüsing, M., &#38; Mookherjea, S. (2020). High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides. <i>Physical Review Letters</i>, <i>124</i>(16), Article 163603. <a href=\"https://doi.org/10.1103/physrevlett.124.163603\">https://doi.org/10.1103/physrevlett.124.163603</a>","ama":"Zhao J, Ma C, Rüsing M, Mookherjea S. High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides. <i>Physical Review Letters</i>. 2020;124(16). doi:<a href=\"https://doi.org/10.1103/physrevlett.124.163603\">10.1103/physrevlett.124.163603</a>","mla":"Zhao, Jie, et al. “High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides.” <i>Physical Review Letters</i>, vol. 124, no. 16, 163603, American Physical Society (APS), 2020, doi:<a href=\"https://doi.org/10.1103/physrevlett.124.163603\">10.1103/physrevlett.124.163603</a>.","short":"J. Zhao, C. Ma, M. Rüsing, S. Mookherjea, Physical Review Letters 124 (2020).","bibtex":"@article{Zhao_Ma_Rüsing_Mookherjea_2020, title={High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides}, volume={124}, DOI={<a href=\"https://doi.org/10.1103/physrevlett.124.163603\">10.1103/physrevlett.124.163603</a>}, number={16163603}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Zhao, Jie and Ma, Chaoxuan and Rüsing, Michael and Mookherjea, Shayan}, year={2020} }","ieee":"J. Zhao, C. Ma, M. Rüsing, and S. Mookherjea, “High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides,” <i>Physical Review Letters</i>, vol. 124, no. 16, Art. no. 163603, 2020, doi: <a href=\"https://doi.org/10.1103/physrevlett.124.163603\">10.1103/physrevlett.124.163603</a>.","chicago":"Zhao, Jie, Chaoxuan Ma, Michael Rüsing, and Shayan Mookherjea. “High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides.” <i>Physical Review Letters</i> 124, no. 16 (2020). <a href=\"https://doi.org/10.1103/physrevlett.124.163603\">https://doi.org/10.1103/physrevlett.124.163603</a>."},"year":"2020","volume":124,"author":[{"full_name":"Zhao, Jie","last_name":"Zhao","first_name":"Jie"},{"first_name":"Chaoxuan","full_name":"Ma, Chaoxuan","last_name":"Ma"},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","orcid":"0000-0003-4682-4577","last_name":"Rüsing"},{"full_name":"Mookherjea, Shayan","last_name":"Mookherjea","first_name":"Shayan"}],"date_created":"2023-10-11T07:56:17Z","date_updated":"2023-10-11T08:05:30Z","publisher":"American Physical Society (APS)","doi":"10.1103/physrevlett.124.163603","title":"High Quality Entangled Photon Pair Generation in Periodically Poled Thin-Film Lithium Niobate Waveguides","publication":"Physical Review Letters","type":"journal_article","status":"public","user_id":"22501","_id":"47952","extern":"1","language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy"],"article_number":"163603"}]