---
_id: '59259'
author:
- first_name: Tobias
full_name: Schwabe, Tobias
id: '39217'
last_name: Schwabe
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Niels
full_name: Staal, Niels
last_name: Staal
- first_name: Max
full_name: Schwengelbeck, Max
last_name: Schwengelbeck
- first_name: Laura
full_name: Bollmers, Laura
id: '61375'
last_name: Bollmers
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
citation:
ama: Schwabe T, Rüsing M, Staal N, et al. Quantum Photonic Systems in CMOS Compatible
Silicon Nitride Technology . Zenodo; 2024. doi:10.5281/zenodo.15124929
apa: Schwabe, T., Rüsing, M., Staal, N., Schwengelbeck, M., Bollmers, L., Padberg,
L., Eigner, C., Silberhorn, C., & Scheytt, J. C. (2024). Quantum photonic
systems in CMOS compatible silicon nitride technology . Zenodo. https://doi.org/10.5281/zenodo.15124929
bibtex: '@book{Schwabe_Rüsing_Staal_Schwengelbeck_Bollmers_Padberg_Eigner_Silberhorn_Scheytt_2024,
title={Quantum photonic systems in CMOS compatible silicon nitride technology
}, DOI={10.5281/zenodo.15124929},
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} }'
chicago: Schwabe, Tobias, Michael Rüsing, Niels Staal, Max Schwengelbeck, Laura
Bollmers, Laura Padberg, Christof Eigner, Christine Silberhorn, and J. Christoph
Scheytt. Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology
. Zenodo, 2024. https://doi.org/10.5281/zenodo.15124929.
ieee: T. Schwabe et al., Quantum photonic systems in CMOS compatible silicon
nitride technology . Zenodo, 2024.
mla: Schwabe, Tobias, et al. Quantum Photonic Systems in CMOS Compatible Silicon
Nitride Technology . Zenodo, 2024, doi:10.5281/zenodo.15124929.
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.
date_created: 2025-04-02T11:24:23Z
date_updated: 2025-04-03T12:34:56Z
department:
- _id: '288'
- _id: '15'
- _id: '623'
doi: 10.5281/zenodo.15124929
language:
- iso: eng
publisher: Zenodo
status: public
title: 'Quantum photonic systems in CMOS compatible silicon nitride technology '
type: misc
user_id: '22501'
year: '2024'
...
---
_id: '47992'
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.
article_type: original
author:
- first_name: Ulises
full_name: Acevedo-Salas, Ulises
last_name: Acevedo-Salas
- first_name: Boris
full_name: Croes, Boris
last_name: Croes
- first_name: Yide
full_name: Zhang, Yide
last_name: Zhang
- first_name: Olivier
full_name: Cregut, Olivier
last_name: Cregut
- first_name: Kokou Dodzi
full_name: Dorkenoo, Kokou Dodzi
last_name: Dorkenoo
- first_name: Benjamin
full_name: Kirbus, Benjamin
last_name: Kirbus
- first_name: Ekta
full_name: Singh, Ekta
last_name: Singh
- first_name: Henrik
full_name: Beccard, Henrik
last_name: Beccard
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Riccardo
full_name: Hertel, Riccardo
last_name: Hertel
- first_name: Eugene A.
full_name: Eliseev, Eugene A.
last_name: Eliseev
- first_name: Anna N.
full_name: Morozovska, Anna N.
last_name: Morozovska
- first_name: Salia
full_name: Cherifi-Hertel, Salia
last_name: Cherifi-Hertel
citation:
ama: Acevedo-Salas U, Croes B, Zhang Y, et al. Impact of 3D Curvature on the Polarization
Orientation in Non-Ising Domain Walls. Nano Letters. 2023;23(3):795-803.
doi:10.1021/acs.nanolett.2c03579
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., & Cherifi-Hertel, S. (2023). Impact of 3D Curvature on
the Polarization Orientation in Non-Ising Domain Walls. Nano Letters, 23(3),
795–803. https://doi.org/10.1021/acs.nanolett.2c03579
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={10.1021/acs.nanolett.2c03579},
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}
}'
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.” Nano Letters 23,
no. 3 (2023): 795–803. https://doi.org/10.1021/acs.nanolett.2c03579.'
ieee: 'U. Acevedo-Salas et al., “Impact of 3D Curvature on the Polarization
Orientation in Non-Ising Domain Walls,” Nano Letters, vol. 23, no. 3, pp.
795–803, 2023, doi: 10.1021/acs.nanolett.2c03579.'
mla: Acevedo-Salas, Ulises, et al. “Impact of 3D Curvature on the Polarization Orientation
in Non-Ising Domain Walls.” Nano Letters, vol. 23, no. 3, American Chemical
Society (ACS), 2023, pp. 795–803, doi:10.1021/acs.nanolett.2c03579.
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.
date_created: 2023-10-11T09:06:05Z
date_updated: 2023-10-11T09:06:31Z
doi: 10.1021/acs.nanolett.2c03579
extern: '1'
intvolume: ' 23'
issue: '3'
keyword:
- Mechanical Engineering
- Condensed Matter Physics
- General Materials Science
- General Chemistry
- Bioengineering
language:
- iso: eng
page: 795-803
publication: Nano Letters
publication_identifier:
issn:
- 1530-6984
- 1530-6992
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Impact of 3D Curvature on the Polarization Orientation in Non-Ising Domain
Walls
type: journal_article
user_id: '22501'
volume: 23
year: '2023'
...
---
_id: '47993'
abstract:
- lang: eng
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.
article_number: '024420'
article_type: original
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
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Michael
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: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Simone
full_name: Sanna, Simone
last_name: Sanna
citation:
ama: Singh E, Pionteck MN, Reitzig S, et al. Vibrational properties of LiNbO3 and
LiTaO3 under uniaxial stress. Physical Review Materials. 2023;7(2). doi:10.1103/physrevmaterials.7.024420
apa: Singh, E., Pionteck, M. N., Reitzig, S., Lange, M., Rüsing, M., Eng, L. M.,
& Sanna, S. (2023). Vibrational properties of LiNbO3 and LiTaO3 under uniaxial
stress. Physical Review Materials, 7(2), Article 024420. https://doi.org/10.1103/physrevmaterials.7.024420
bibtex: '@article{Singh_Pionteck_Reitzig_Lange_Rüsing_Eng_Sanna_2023, title={Vibrational
properties of LiNbO3 and LiTaO3 under uniaxial stress}, volume={7}, DOI={10.1103/physrevmaterials.7.024420},
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}
}'
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.” Physical Review Materials 7, no. 2 (2023). https://doi.org/10.1103/physrevmaterials.7.024420.
ieee: 'E. Singh et al., “Vibrational properties of LiNbO3 and LiTaO3 under
uniaxial stress,” Physical Review Materials, vol. 7, no. 2, Art. no. 024420,
2023, doi: 10.1103/physrevmaterials.7.024420.'
mla: Singh, Ekta, et al. “Vibrational Properties of LiNbO3 and LiTaO3 under Uniaxial
Stress.” Physical Review Materials, vol. 7, no. 2, 024420, American Physical
Society (APS), 2023, doi:10.1103/physrevmaterials.7.024420.
short: E. Singh, M.N. Pionteck, S. Reitzig, M. Lange, M. Rüsing, L.M. Eng, S. Sanna,
Physical Review Materials 7 (2023).
date_created: 2023-10-11T09:06:56Z
date_updated: 2023-10-11T09:08:16Z
doi: 10.1103/physrevmaterials.7.024420
extern: '1'
intvolume: ' 7'
issue: '2'
keyword:
- Physics and Astronomy (miscellaneous)
- General Materials Science
language:
- iso: eng
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society (APS)
quality_controlled: '1'
status: public
title: Vibrational properties of LiNbO3 and LiTaO3 under uniaxial stress
type: journal_article
user_id: '22501'
volume: 7
year: '2023'
...
---
_id: '47994'
abstract:
- lang: eng
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.
article_number: '123105'
article_type: original
author:
- first_name: Kai J.
full_name: Spychala, Kai J.
last_name: Spychala
- first_name: Zeeshan H.
full_name: Amber, Zeeshan H.
last_name: Amber
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
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.
Journal of Applied Physics. 2023;133(12). doi:10.1063/5.0136252'
apa: 'Spychala, K. J., Amber, Z. H., Eng, L. M., & Rüsing, M. (2023). Modeling
nonlinear optical interactions of focused beams in bulk crystals and thin films:
A phenomenological approach. Journal of Applied Physics, 133(12),
Article 123105. https://doi.org/10.1063/5.0136252'
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={10.1063/5.0136252},
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} }'
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.” Journal of Applied Physics 133,
no. 12 (2023). https://doi.org/10.1063/5.0136252.'
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,” Journal of Applied Physics, vol. 133, no. 12, Art. no. 123105,
2023, doi: 10.1063/5.0136252.'
mla: 'Spychala, Kai J., et al. “Modeling Nonlinear Optical Interactions of Focused
Beams in Bulk Crystals and Thin Films: A Phenomenological Approach.” Journal
of Applied Physics, vol. 133, no. 12, 123105, AIP Publishing, 2023, doi:10.1063/5.0136252.'
short: K.J. Spychala, Z.H. Amber, L.M. Eng, M. Rüsing, Journal of Applied Physics
133 (2023).
date_created: 2023-10-11T09:09:00Z
date_updated: 2023-10-11T16:10:54Z
doi: 10.1063/5.0136252
extern: '1'
intvolume: ' 133'
issue: '12'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.1063/5.0136252'
oa: '1'
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: 'Modeling nonlinear optical interactions of focused beams in bulk crystals
and thin films: A phenomenological approach'
type: journal_article
user_id: '22501'
volume: 133
year: '2023'
...
---
_id: '47997'
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.
article_number: '1423'
author:
- first_name: Sergej
full_name: Neufeld, Sergej
last_name: Neufeld
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Gerhard
full_name: Berth, Gerhard
id: '53'
last_name: Berth
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
ama: Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium
Titanyl Phosphate Crystal Family. Crystals. 2023;13(10). doi:10.3390/cryst13101423
apa: Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn,
C., Eng, L. M., Schmidt, W. G., & Rüsing, M. (2023). Vibrational Properties
of the Potassium Titanyl Phosphate Crystal Family. Crystals, 13(10),
Article 1423. https://doi.org/10.3390/cryst13101423
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={10.3390/cryst13101423},
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} }'
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.” Crystals
13, no. 10 (2023). https://doi.org/10.3390/cryst13101423.
ieee: 'S. Neufeld et al., “Vibrational Properties of the Potassium Titanyl
Phosphate Crystal Family,” Crystals, vol. 13, no. 10, Art. no. 1423, 2023,
doi: 10.3390/cryst13101423.'
mla: Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate
Crystal Family.” Crystals, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:10.3390/cryst13101423.
short: S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn,
L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).
date_created: 2023-10-11T09:10:53Z
date_updated: 2023-10-11T09:15:58Z
department:
- _id: '169'
doi: 10.3390/cryst13101423
funded_apc: '1'
intvolume: ' 13'
issue: '10'
keyword:
- Inorganic Chemistry
- Condensed Matter Physics
- General Materials Science
- General Chemical Engineering
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3390/cryst13101423
oa: '1'
project:
- _id: '168'
grant_number: '231447078'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
publication: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family
type: journal_article
user_id: '22501'
volume: 13
year: '2023'
...
---
_id: '47996'
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.
article_type: original
author:
- first_name: Umar
full_name: Bashir, Umar
last_name: Bashir
- first_name: Klaus
full_name: Böttcher, Klaus
last_name: Böttcher
- first_name: Detlef
full_name: Klimm, Detlef
last_name: Klimm
- first_name: Steffen
full_name: Ganschow, Steffen
last_name: Ganschow
- first_name: Felix
full_name: Bernhardt, Felix
last_name: Bernhardt
- first_name: Simone
full_name: Sanna, Simone
last_name: Sanna
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Matthias
full_name: Bickermann, Matthias
last_name: Bickermann
citation:
ama: 'Bashir U, Böttcher K, Klimm D, et al. Solid solutions of lithium niobate and
lithium tantalate: crystal growth and the ferroelectric transition. Ferroelectrics.
2023;613(1):250-262. doi:10.1080/00150193.2023.2189842'
apa: 'Bashir, U., Böttcher, K., Klimm, D., Ganschow, S., Bernhardt, F., Sanna, S.,
Rüsing, M., Eng, L. M., & Bickermann, M. (2023). Solid solutions of lithium
niobate and lithium tantalate: crystal growth and the ferroelectric transition.
Ferroelectrics, 613(1), 250–262. https://doi.org/10.1080/00150193.2023.2189842'
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={10.1080/00150193.2023.2189842},
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} }'
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.” Ferroelectrics 613, no. 1 (2023): 250–62. https://doi.org/10.1080/00150193.2023.2189842.'
ieee: 'U. Bashir et al., “Solid solutions of lithium niobate and lithium
tantalate: crystal growth and the ferroelectric transition,” Ferroelectrics,
vol. 613, no. 1, pp. 250–262, 2023, doi: 10.1080/00150193.2023.2189842.'
mla: 'Bashir, Umar, et al. “Solid Solutions of Lithium Niobate and Lithium Tantalate:
Crystal Growth and the Ferroelectric Transition.” Ferroelectrics, vol.
613, no. 1, Informa UK Limited, 2023, pp. 250–62, doi:10.1080/00150193.2023.2189842.'
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.
date_created: 2023-10-11T09:10:08Z
date_updated: 2023-10-11T09:10:36Z
doi: 10.1080/00150193.2023.2189842
extern: '1'
intvolume: ' 613'
issue: '1'
keyword:
- Condensed Matter Physics
- Electronic
- Optical and Magnetic Materials
language:
- iso: eng
page: 250-262
publication: Ferroelectrics
publication_identifier:
issn:
- 0015-0193
- 1563-5112
publication_status: published
publisher: Informa UK Limited
quality_controlled: '1'
status: public
title: 'Solid solutions of lithium niobate and lithium tantalate: crystal growth and
the ferroelectric transition'
type: journal_article
user_id: '22501'
volume: 613
year: '2023'
...
---
_id: '50407'
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.
article_number: '064043'
article_type: original
author:
- first_name: Henrik
full_name: Beccard, Henrik
last_name: Beccard
- first_name: Elke
full_name: Beyreuther, Elke
last_name: Beyreuther
- first_name: Benjamin
full_name: Kirbus, Benjamin
last_name: Kirbus
- first_name: Samuel D.
full_name: Seddon, Samuel D.
last_name: Seddon
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
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. Physical Review Applied. 2023;20(6). doi:10.1103/physrevapplied.20.064043
apa: Beccard, H., Beyreuther, E., Kirbus, B., Seddon, S. D., Rüsing, M., & Eng,
L. M. (2023). Hall mobilities and sheet carrier densities in a single LiNbO3 conductive
ferroelectric domain wall. Physical Review Applied, 20(6), Article
064043. https://doi.org/10.1103/physrevapplied.20.064043
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={10.1103/physrevapplied.20.064043},
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} }'
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.” Physical Review Applied 20,
no. 6 (2023). https://doi.org/10.1103/physrevapplied.20.064043.
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,” Physical Review Applied, vol. 20, no. 6, Art.
no. 064043, 2023, doi: 10.1103/physrevapplied.20.064043.'
mla: Beccard, Henrik, et al. “Hall Mobilities and Sheet Carrier Densities in a Single
LiNbO3 Conductive Ferroelectric Domain Wall.” Physical Review Applied,
vol. 20, no. 6, 064043, American Physical Society (APS), 2023, doi:10.1103/physrevapplied.20.064043.
short: H. Beccard, E. Beyreuther, B. Kirbus, S.D. Seddon, M. Rüsing, L.M. Eng, Physical
Review Applied 20 (2023).
date_created: 2024-01-09T15:03:22Z
date_updated: 2024-01-09T15:05:29Z
doi: 10.1103/physrevapplied.20.064043
intvolume: ' 20'
issue: '6'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2308.00061.pdf
oa: '1'
publication: Physical Review Applied
publication_identifier:
issn:
- 2331-7019
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Hall mobilities and sheet carrier densities in a single LiNbO3 conductive ferroelectric
domain wall
type: journal_article
user_id: '22501'
volume: 20
year: '2023'
...
---
_id: '54852'
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.
article_number: '1423'
author:
- first_name: Sergej
full_name: Neufeld, Sergej
last_name: Neufeld
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Gerhard
full_name: Berth, Gerhard
id: '53'
last_name: Berth
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
ama: Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium
Titanyl Phosphate Crystal Family. Crystals. 2023;13(10). doi:10.3390/cryst13101423
apa: Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn,
C., Eng, L. M., Schmidt, W. G., & Rüsing, M. (2023). Vibrational Properties
of the Potassium Titanyl Phosphate Crystal Family. Crystals, 13(10),
Article 1423. https://doi.org/10.3390/cryst13101423
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={10.3390/cryst13101423},
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} }'
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.” Crystals
13, no. 10 (2023). https://doi.org/10.3390/cryst13101423.
ieee: 'S. Neufeld et al., “Vibrational Properties of the Potassium Titanyl
Phosphate Crystal Family,” Crystals, vol. 13, no. 10, Art. no. 1423, 2023,
doi: 10.3390/cryst13101423.'
mla: Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate
Crystal Family.” Crystals, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:10.3390/cryst13101423.
short: S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn,
L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).
date_created: 2024-06-24T06:15:00Z
date_updated: 2024-06-24T06:30:23Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '288'
- _id: '230'
- _id: '429'
doi: 10.3390/cryst13101423
intvolume: ' 13'
issue: '10'
language:
- iso: eng
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
publication: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
status: public
title: Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family
type: journal_article
user_id: '16199'
volume: 13
year: '2023'
...
---
_id: '47984'
abstract:
- lang: eng
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.
article_type: original
author:
- first_name: Peter A.
full_name: Hegarty, Peter A.
last_name: Hegarty
- first_name: Henrik
full_name: Beccard, Henrik
last_name: Beccard
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
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. Journal of Applied Physics. 2022;131(24). doi:10.1063/5.0094988'
apa: 'Hegarty, P. A., Beccard, H., Eng, L. M., & Rüsing, M. (2022). Turn all
the lights off: Bright- and dark-field second-harmonic microscopy to select contrast
mechanisms for ferroelectric domain walls. Journal of Applied Physics,
131(24). https://doi.org/10.1063/5.0094988'
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={10.1063/5.0094988},
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} }'
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.” Journal of Applied Physics
131, no. 24 (2022). https://doi.org/10.1063/5.0094988.'
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,” Journal of Applied Physics, vol. 131,
no. 24, 2022, doi: 10.1063/5.0094988.'
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.” Journal of Applied Physics, vol. 131, no. 24, AIP Publishing, 2022,
doi:10.1063/5.0094988.'
short: P.A. Hegarty, H. Beccard, L.M. Eng, M. Rüsing, Journal of Applied Physics
131 (2022).
date_created: 2023-10-11T08:53:25Z
date_updated: 2023-10-11T08:53:55Z
doi: 10.1063/5.0094988
extern: '1'
funded_apc: '1'
intvolume: ' 131'
issue: '24'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.1063/5.0094988'
oa: '1'
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: 'Turn all the lights off: Bright- and dark-field second-harmonic microscopy
to select contrast mechanisms for ferroelectric domain walls'
type: journal_article
user_id: '22501'
volume: 131
year: '2022'
...
---
_id: '47982'
abstract:
- lang: eng
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.
article_number: '162901'
article_type: original
author:
- first_name: Sven
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Franz
full_name: Hempel, Franz
last_name: Hempel
- first_name: Julius
full_name: Ratzenberger, Julius
last_name: Ratzenberger
- first_name: Peter A.
full_name: Hegarty, Peter A.
last_name: Hegarty
- first_name: Zeeshan H.
full_name: Amber, Zeeshan H.
last_name: Amber
- first_name: Robin
full_name: Buschbeck, Robin
last_name: Buschbeck
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: Reitzig S, Hempel F, Ratzenberger J, et al. High-speed hyperspectral imaging
of ferroelectric domain walls using broadband coherent anti-Stokes Raman scattering.
Applied Physics Letters. 2022;120(16). doi:10.1063/5.0086029
apa: Reitzig, S., Hempel, F., Ratzenberger, J., Hegarty, P. A., Amber, Z. H., Buschbeck,
R., Rüsing, M., & Eng, L. M. (2022). High-speed hyperspectral imaging of ferroelectric
domain walls using broadband coherent anti-Stokes Raman scattering. Applied
Physics Letters, 120(16), Article 162901. https://doi.org/10.1063/5.0086029
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={10.1063/5.0086029},
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} }'
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.” Applied Physics Letters 120, no. 16 (2022). https://doi.org/10.1063/5.0086029.
ieee: 'S. Reitzig et al., “High-speed hyperspectral imaging of ferroelectric
domain walls using broadband coherent anti-Stokes Raman scattering,” Applied
Physics Letters, vol. 120, no. 16, Art. no. 162901, 2022, doi: 10.1063/5.0086029.'
mla: Reitzig, Sven, et al. “High-Speed Hyperspectral Imaging of Ferroelectric Domain
Walls Using Broadband Coherent Anti-Stokes Raman Scattering.” Applied Physics
Letters, vol. 120, no. 16, 162901, AIP Publishing, 2022, doi:10.1063/5.0086029.
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).
date_created: 2023-10-11T08:50:06Z
date_updated: 2023-10-11T08:50:42Z
doi: 10.1063/5.0086029
extern: '1'
intvolume: ' 120'
issue: '16'
keyword:
- Physics and Astronomy (miscellaneous)
language:
- iso: eng
publication: Applied Physics Letters
publication_identifier:
issn:
- 0003-6951
- 1077-3118
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: High-speed hyperspectral imaging of ferroelectric domain walls using broadband
coherent anti-Stokes Raman scattering
type: journal_article
user_id: '22501'
volume: 120
year: '2022'
...
---
_id: '47986'
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.
article_number: '144103'
article_type: original
author:
- first_name: Ekta
full_name: Singh, Ekta
last_name: Singh
- first_name: Henrik
full_name: Beccard, Henrik
last_name: Beccard
- first_name: Zeeshan H.
full_name: Amber, Zeeshan H.
last_name: Amber
- first_name: Julius
full_name: Ratzenberger, Julius
last_name: Ratzenberger
- first_name: Clifford W.
full_name: Hicks, Clifford W.
last_name: Hicks
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: Singh E, Beccard H, Amber ZH, et al. Tuning domain wall conductivity in bulk
lithium niobate by uniaxial stress. Physical Review B. 2022;106(14). doi:10.1103/physrevb.106.144103
apa: Singh, E., Beccard, H., Amber, Z. H., Ratzenberger, J., Hicks, C. W., Rüsing,
M., & Eng, L. M. (2022). Tuning domain wall conductivity in bulk lithium niobate
by uniaxial stress. Physical Review B, 106(14), Article 144103.
https://doi.org/10.1103/physrevb.106.144103
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={10.1103/physrevb.106.144103},
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}
}'
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.” Physical Review B 106, no. 14
(2022). https://doi.org/10.1103/physrevb.106.144103.
ieee: 'E. Singh et al., “Tuning domain wall conductivity in bulk lithium
niobate by uniaxial stress,” Physical Review B, vol. 106, no. 14, Art.
no. 144103, 2022, doi: 10.1103/physrevb.106.144103.'
mla: Singh, Ekta, et al. “Tuning Domain Wall Conductivity in Bulk Lithium Niobate
by Uniaxial Stress.” Physical Review B, vol. 106, no. 14, 144103, American
Physical Society (APS), 2022, doi:10.1103/physrevb.106.144103.
short: E. Singh, H. Beccard, Z.H. Amber, J. Ratzenberger, C.W. Hicks, M. Rüsing,
L.M. Eng, Physical Review B 106 (2022).
date_created: 2023-10-11T08:55:42Z
date_updated: 2023-10-11T08:56:09Z
doi: 10.1103/physrevb.106.144103
extern: '1'
intvolume: ' 106'
issue: '14'
language:
- iso: eng
publication: Physical Review B
publication_identifier:
issn:
- 2469-9950
- 2469-9969
publication_status: published
publisher: American Physical Society (APS)
quality_controlled: '1'
status: public
title: Tuning domain wall conductivity in bulk lithium niobate by uniaxial stress
type: journal_article
user_id: '22501'
volume: 106
year: '2022'
...
---
_id: '47985'
abstract:
- lang: eng
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.
article_type: original
author:
- first_name: Henrik
full_name: Beccard, Henrik
last_name: Beccard
- first_name: Benjamin
full_name: Kirbus, Benjamin
last_name: Kirbus
- first_name: Elke
full_name: Beyreuther, Elke
last_name: Beyreuther
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Petr
full_name: Bednyakov, Petr
last_name: Bednyakov
- first_name: Jiří
full_name: Hlinka, Jiří
last_name: Hlinka
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
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. ACS Applied
Nano Materials. 2022;5(7):8717-8722. doi:10.1021/acsanm.2c01919'
apa: 'Beccard, H., Kirbus, B., Beyreuther, E., Rüsing, M., Bednyakov, P., Hlinka,
J., & Eng, L. M. (2022). Nanoscale Conductive Sheets in Ferroelectric BaTiO3:
Large Hall Electron Mobilities at Head-to-Head Domain Walls. ACS Applied Nano
Materials, 5(7), 8717–8722. https://doi.org/10.1021/acsanm.2c01919'
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={10.1021/acsanm.2c01919},
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} }'
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.” ACS Applied
Nano Materials 5, no. 7 (2022): 8717–22. https://doi.org/10.1021/acsanm.2c01919.'
ieee: 'H. Beccard et al., “Nanoscale Conductive Sheets in Ferroelectric BaTiO3:
Large Hall Electron Mobilities at Head-to-Head Domain Walls,” ACS Applied Nano
Materials, vol. 5, no. 7, pp. 8717–8722, 2022, doi: 10.1021/acsanm.2c01919.'
mla: 'Beccard, Henrik, et al. “Nanoscale Conductive Sheets in Ferroelectric BaTiO3:
Large Hall Electron Mobilities at Head-to-Head Domain Walls.” ACS Applied Nano
Materials, vol. 5, no. 7, American Chemical Society (ACS), 2022, pp. 8717–22,
doi:10.1021/acsanm.2c01919.'
short: H. Beccard, B. Kirbus, E. Beyreuther, M. Rüsing, P. Bednyakov, J. Hlinka,
L.M. Eng, ACS Applied Nano Materials 5 (2022) 8717–8722.
date_created: 2023-10-11T08:54:20Z
date_updated: 2023-10-11T08:55:16Z
doi: 10.1021/acsanm.2c01919
extern: '1'
intvolume: ' 5'
issue: '7'
keyword:
- General Materials Science
language:
- iso: eng
page: 8717-8722
publication: ACS Applied Nano Materials
publication_identifier:
issn:
- 2574-0970
- 2574-0970
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: 'Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities
at Head-to-Head Domain Walls'
type: journal_article
user_id: '22501'
volume: 5
year: '2022'
...
---
_id: '47981'
author:
- first_name: Jonas
full_name: Golde, Jonas
last_name: Golde
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Richard
full_name: Kindler, Richard
last_name: Kindler
- first_name: Svea
full_name: Steuer, Svea
last_name: Steuer
- first_name: Jan
full_name: Rix, Jan
last_name: Rix
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Edmund
full_name: Koch, Edmund
last_name: Koch
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. Optical Components and
Materials XIX. SPIE; 2022. doi:10.1117/12.2608470'
apa: Golde, J., Rüsing, M., Kindler, R., Steuer, S., Rix, J., Eng, L. M., &
Koch, E. (2022). Investigation of ferroelectric domain walls in periodically-poled
LiNbO3 single crystals by polarization-sensitive optical coherence tomography.
In M. J. Digonnet & S. Jiang (Eds.), Optical Components and Materials XIX.
SPIE. https://doi.org/10.1117/12.2608470
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={10.1117/12.2608470},
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} }'
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 Optical Components and Materials XIX, edited by Michel J. Digonnet and
Shibin Jiang. SPIE, 2022. https://doi.org/10.1117/12.2608470.
ieee: 'J. Golde et al., “Investigation of ferroelectric domain walls in periodically-poled
LiNbO3 single crystals by polarization-sensitive optical coherence tomography,”
in Optical Components and Materials XIX, San Francisco, California, United
States, 2022, doi: 10.1117/12.2608470.'
mla: Golde, Jonas, et al. “Investigation of Ferroelectric Domain Walls in Periodically-Poled
LiNbO3 Single Crystals by Polarization-Sensitive Optical Coherence Tomography.”
Optical Components and Materials XIX, edited by Michel J. Digonnet and
Shibin Jiang, SPIE, 2022, doi:10.1117/12.2608470.
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.'
conference:
location: San Francisco, California, United States
name: Optical Components and Materials XIX
start_date: '2022'
date_created: 2023-10-11T08:47:26Z
date_updated: 2023-10-11T08:49:43Z
doi: 10.1117/12.2608470
editor:
- first_name: Michel J.
full_name: Digonnet, Michel J.
last_name: Digonnet
- first_name: Shibin
full_name: Jiang, Shibin
last_name: Jiang
extern: '1'
language:
- iso: eng
publication: Optical Components and Materials XIX
publication_status: published
publisher: SPIE
quality_controlled: '1'
status: public
title: Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single
crystals by polarization-sensitive optical coherence tomography
type: conference
user_id: '22501'
year: '2022'
...
---
_id: '47989'
abstract:
- lang: eng
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.<
article_number: '213102'
article_type: original
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
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
citation:
ama: Amber ZH, Spychala KJ, Eng LM, Rüsing M. Nonlinear optical interactions in
focused beams and nanosized structures. Journal of Applied Physics. 2022;132(21).
doi:10.1063/5.0125926
apa: Amber, Z. H., Spychala, K. J., Eng, L. M., & Rüsing, M. (2022). Nonlinear
optical interactions in focused beams and nanosized structures. Journal of
Applied Physics, 132(21), Article 213102. https://doi.org/10.1063/5.0125926
bibtex: '@article{Amber_Spychala_Eng_Rüsing_2022, title={Nonlinear optical interactions
in focused beams and nanosized structures}, volume={132}, DOI={10.1063/5.0125926},
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} }'
chicago: Amber, Zeeshan H., Kai J. Spychala, Lukas M. Eng, and Michael Rüsing. “Nonlinear
Optical Interactions in Focused Beams and Nanosized Structures.” Journal of
Applied Physics 132, no. 21 (2022). https://doi.org/10.1063/5.0125926.
ieee: 'Z. H. Amber, K. J. Spychala, L. M. Eng, and M. Rüsing, “Nonlinear optical
interactions in focused beams and nanosized structures,” Journal of Applied
Physics, vol. 132, no. 21, Art. no. 213102, 2022, doi: 10.1063/5.0125926.'
mla: Amber, Zeeshan H., et al. “Nonlinear Optical Interactions in Focused Beams
and Nanosized Structures.” Journal of Applied Physics, vol. 132, no. 21,
213102, AIP Publishing, 2022, doi:10.1063/5.0125926.
short: Z.H. Amber, K.J. Spychala, L.M. Eng, M. Rüsing, Journal of Applied Physics
132 (2022).
date_created: 2023-10-11T08:59:23Z
date_updated: 2023-10-11T09:01:37Z
doi: 10.1063/5.0125926
funded_apc: '1'
intvolume: ' 132'
issue: '21'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.1063/5.0125926'
oa: '1'
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: Nonlinear optical interactions in focused beams and nanosized structures
type: journal_article
user_id: '22501'
volume: 132
year: '2022'
...
---
_id: '47987'
abstract:
- lang: eng
text: AbstractPure samples of colorless, air‐stable
Ba(BO2OH) crystals were obtained from Ba(NO3)2
and H3BO3 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)3
acts as a proton donor (Brønsted acid) rather than a hydroxide acceptor (Lewis
acid). Ba(BO2OH) crystallizes in the non‐centrosymmetric
orthorhombic space group P212121.
Hydrogen bonds connect the almost planar (BO2OH)2−
anions, which are isostructural to HCO3−,
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(BO2OH) dehydrates to Ba2B2O5.
Moreover, the non‐centrosymmetric structure of Ba(BO2OH)
crystals was verified with power‐dependent confocal Second Harmonic Generation
(SHG) microscopy indicating large conversion efficiencies in ambient atmosphere.
article_number: ' e2022001'
article_type: original
author:
- first_name: Yuxi
full_name: Li, Yuxi
last_name: Li
- first_name: Peter A.
full_name: Hegarty, Peter A.
last_name: Hegarty
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Michael
full_name: Ruck, Michael
last_name: Ruck
citation:
ama: Li Y, Hegarty PA, Rüsing M, Eng LM, Ruck M. Ba(BO2OH) – A Monoprotonated Monoborate
from Hydroflux Showing Intense Second Harmonic Generation. Zeitschrift für
anorganische und allgemeine Chemie. 2022;648(21). doi:10.1002/zaac.202200193
apa: Li, Y., Hegarty, P. A., Rüsing, M., Eng, L. M., & Ruck, M. (2022). Ba(BO2OH)
– A Monoprotonated Monoborate from Hydroflux Showing Intense Second Harmonic Generation.
Zeitschrift Für Anorganische Und Allgemeine Chemie, 648(21), Article
e2022001. https://doi.org/10.1002/zaac.202200193
bibtex: '@article{Li_Hegarty_Rüsing_Eng_Ruck_2022, title={Ba(BO2OH) – A Monoprotonated
Monoborate from Hydroflux Showing Intense Second Harmonic Generation}, volume={648},
DOI={10.1002/zaac.202200193},
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} }'
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.” Zeitschrift Für Anorganische Und Allgemeine Chemie
648, no. 21 (2022). https://doi.org/10.1002/zaac.202200193.
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,” Zeitschrift
für anorganische und allgemeine Chemie, vol. 648, no. 21, Art. no. e2022001,
2022, doi: 10.1002/zaac.202200193.'
mla: Li, Yuxi, et al. “Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing
Intense Second Harmonic Generation.” Zeitschrift Für Anorganische Und Allgemeine
Chemie, vol. 648, no. 21, e2022001, Wiley, 2022, doi:10.1002/zaac.202200193.
short: Y. Li, P.A. Hegarty, M. Rüsing, L.M. Eng, M. Ruck, Zeitschrift Für Anorganische
Und Allgemeine Chemie 648 (2022).
date_created: 2023-10-11T08:56:26Z
date_updated: 2023-10-11T08:59:51Z
doi: 10.1002/zaac.202200193
extern: '1'
intvolume: ' 648'
issue: '21'
keyword:
- Inorganic Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/epdf/10.1002/zaac.202200193
oa: '1'
publication: Zeitschrift für anorganische und allgemeine Chemie
publication_identifier:
issn:
- 0044-2313
- 1521-3749
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Ba(BO2OH) – A Monoprotonated Monoborate from Hydroflux Showing Intense Second
Harmonic Generation
type: journal_article
user_id: '22501'
volume: 648
year: '2022'
...
---
_id: '47988'
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)Journal of Applied
Physics. 2022;132(21):214102. doi:10.1063/5.0115673
apa: Hegarty, P. A., Eng, L. M., & Rüsing, M. (2022). Tuning the Čerenkov second
harmonic contrast from ferroelectric domain walls via anomalous dispersion. Journal
of Applied Physics, 132(21), 214102. https://doi.org/10.1063/5.0115673
bibtex: '@article{Hegarty_Eng_Rüsing_2022, title={Tuning the Čerenkov second harmonic
contrast from ferroelectric domain walls via anomalous dispersion}, volume={132},
DOI={10.1063/5.0115673}, 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} }'
chicago: 'Hegarty, Peter A., Lukas M. Eng, and Michael Rüsing. “Tuning the Čerenkov
Second Harmonic Contrast from Ferroelectric Domain Walls via Anomalous Dispersion.”
Journal of Applied Physics 132, no. 21 (2022): 214102. https://doi.org/10.1063/5.0115673.'
ieee: 'P. A. Hegarty, L. M. Eng, and M. Rüsing, “Tuning the Čerenkov second harmonic
contrast from ferroelectric domain walls via anomalous dispersion,” Journal
of Applied Physics, vol. 132, no. 21, p. 214102, 2022, doi: 10.1063/5.0115673.'
mla: Hegarty, Peter A., et al. “Tuning the Čerenkov Second Harmonic Contrast from
Ferroelectric Domain Walls via Anomalous Dispersion.” Journal of Applied Physics,
vol. 132, no. 21, AIP Publishing, 2022, p. 214102, doi:10.1063/5.0115673.
short: P.A. Hegarty, L.M. Eng, M. Rüsing, Journal of Applied Physics 132 (2022)
214102.
date_created: 2023-10-11T08:57:55Z
date_updated: 2023-10-11T08:58:50Z
doi: 10.1063/5.0115673
extern: '1'
funded_apc: '1'
intvolume: ' 132'
issue: '21'
keyword:
- General Physics and Astronomy
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.1063/5.0115673'
oa: '1'
page: '214102'
publication: Journal of Applied Physics
publication_identifier:
issn:
- 0021-8979
- 1089-7550
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
status: public
title: Tuning the Čerenkov second harmonic contrast from ferroelectric domain walls
via anomalous dispersion
type: journal_article
user_id: '22501'
volume: 132
year: '2022'
...
---
_id: '47980'
abstract:
- lang: eng
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.
article_number: '5051'
article_type: original
author:
- first_name: Jan
full_name: Rix, Jan
last_name: Rix
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Roberta
full_name: Galli, Roberta
last_name: Galli
- first_name: Jonas
full_name: Golde, Jonas
last_name: Golde
- first_name: Sven
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Edmund
full_name: Koch, Edmund
last_name: Koch
citation:
ama: Rix J, Rüsing M, Galli R, et al. Brillouin and Raman imaging of domain walls
in periodically-poled 5%-MgO:LiNbO3. Optics Express. 2022;30(4). doi:10.1364/oe.447554
apa: Rix, J., Rüsing, M., Galli, R., Golde, J., Reitzig, S., Eng, L. M., & Koch,
E. (2022). Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3.
Optics Express, 30(4), Article 5051. https://doi.org/10.1364/oe.447554
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={10.1364/oe.447554}, 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} }'
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.” Optics Express 30, no. 4 (2022). https://doi.org/10.1364/oe.447554.
ieee: 'J. Rix et al., “Brillouin and Raman imaging of domain walls in periodically-poled
5%-MgO:LiNbO3,” Optics Express, vol. 30, no. 4, Art. no. 5051, 2022, doi:
10.1364/oe.447554.'
mla: Rix, Jan, et al. “Brillouin and Raman Imaging of Domain Walls in Periodically-Poled
5%-MgO:LiNbO3.” Optics Express, vol. 30, no. 4, 5051, Optica Publishing
Group, 2022, doi:10.1364/oe.447554.
short: J. Rix, M. Rüsing, R. Galli, J. Golde, S. Reitzig, L.M. Eng, E. Koch, Optics
Express 30 (2022).
date_created: 2023-10-11T08:46:35Z
date_updated: 2023-10-11T08:46:57Z
doi: 10.1364/oe.447554
extern: '1'
intvolume: ' 30'
issue: '4'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3
type: journal_article
user_id: '22501'
volume: 30
year: '2022'
...
---
_id: '47971'
abstract:
- lang: eng
text: 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.
author:
- first_name: Sven
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Franz
full_name: Hempel, Franz
last_name: Hempel
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: 'Reitzig S, Hempel F, Rüsing M, Eng LM. CARS Domain-Wall Analysis in single-crystalline
Lithium Niobate. In: OSA Nonlinear Optics 2021. Optica Publishing Group;
2022. doi:10.1364/nlo.2021.nth3a.7'
apa: Reitzig, S., Hempel, F., Rüsing, M., & Eng, L. M. (2022). CARS Domain-Wall
Analysis in single-crystalline Lithium Niobate. OSA Nonlinear Optics 2021.
OSA Nonlinear Optics 2021, Washington D.C., USA; Online. https://doi.org/10.1364/nlo.2021.nth3a.7
bibtex: '@inproceedings{Reitzig_Hempel_Rüsing_Eng_2022, title={CARS Domain-Wall
Analysis in single-crystalline Lithium Niobate}, DOI={10.1364/nlo.2021.nth3a.7},
booktitle={OSA Nonlinear Optics 2021}, publisher={Optica Publishing Group}, author={Reitzig,
Sven and Hempel, Franz and Rüsing, Michael and Eng, Lukas M.}, year={2022} }'
chicago: Reitzig, Sven, Franz Hempel, Michael Rüsing, and Lukas M. Eng. “CARS Domain-Wall
Analysis in Single-Crystalline Lithium Niobate.” In OSA Nonlinear Optics 2021.
Optica Publishing Group, 2022. https://doi.org/10.1364/nlo.2021.nth3a.7.
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: 10.1364/nlo.2021.nth3a.7.'
mla: Reitzig, Sven, et al. “CARS Domain-Wall Analysis in Single-Crystalline Lithium
Niobate.” OSA Nonlinear Optics 2021, Optica Publishing Group, 2022, doi:10.1364/nlo.2021.nth3a.7.
short: 'S. Reitzig, F. Hempel, M. Rüsing, L.M. Eng, in: OSA Nonlinear Optics 2021,
Optica Publishing Group, 2022.'
conference:
end_date: 2021-8-13
location: Washington D.C., USA; Online
name: OSA Nonlinear Optics 2021
start_date: 2021-8-9
date_created: 2023-10-11T08:27:34Z
date_updated: 2023-10-13T12:16:05Z
doi: 10.1364/nlo.2021.nth3a.7
extern: '1'
language:
- iso: eng
publication: OSA Nonlinear Optics 2021
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: CARS Domain-Wall Analysis in single-crystalline Lithium Niobate
type: conference
user_id: '22501'
year: '2022'
...
---
_id: '47969'
abstract:
- lang: eng
text: 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.
author:
- first_name: Zeeshan H.
full_name: Amber, Zeeshan H.
last_name: Amber
- first_name: Benjamin
full_name: Kirbus, Benjamin
last_name: Kirbus
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: 'Amber ZH, Kirbus B, Rüsing M, Eng LM. Second-harmonic microscopy in optically
confining nanostructures. In: OSA Nonlinear Optics 2021. Optica Publishing
Group; 2022. doi:10.1364/nlo.2021.nf1b.6'
apa: Amber, Z. H., Kirbus, B., Rüsing, M., & Eng, L. M. (2022). Second-harmonic
microscopy in optically confining nanostructures. OSA Nonlinear Optics 2021.
OSA Nonlinear Optics 2021, Washington D.C., USA; Online. https://doi.org/10.1364/nlo.2021.nf1b.6
bibtex: '@inproceedings{Amber_Kirbus_Rüsing_Eng_2022, title={Second-harmonic microscopy
in optically confining nanostructures}, DOI={10.1364/nlo.2021.nf1b.6},
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}
}'
chicago: Amber, Zeeshan H., Benjamin Kirbus, Michael Rüsing, and Lukas M. Eng. “Second-Harmonic
Microscopy in Optically Confining Nanostructures.” In OSA Nonlinear Optics
2021. Optica Publishing Group, 2022. https://doi.org/10.1364/nlo.2021.nf1b.6.
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: 10.1364/nlo.2021.nf1b.6.'
mla: Amber, Zeeshan H., et al. “Second-Harmonic Microscopy in Optically Confining
Nanostructures.” OSA Nonlinear Optics 2021, Optica Publishing Group, 2022,
doi:10.1364/nlo.2021.nf1b.6.
short: 'Z.H. Amber, B. Kirbus, M. Rüsing, L.M. Eng, in: OSA Nonlinear Optics 2021,
Optica Publishing Group, 2022.'
conference:
end_date: 2021-8-13
location: Washington D.C., USA; Online
name: OSA Nonlinear Optics 2021
start_date: 2021-8-9
date_created: 2023-10-11T08:24:55Z
date_updated: 2023-10-13T12:18:48Z
doi: 10.1364/nlo.2021.nf1b.6
language:
- iso: eng
publication: OSA Nonlinear Optics 2021
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Second-harmonic microscopy in optically confining nanostructures
type: conference
user_id: '22501'
year: '2022'
...
---
_id: '47970'
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.
author:
- first_name: Franz
full_name: Hempel, Franz
last_name: Hempel
- first_name: Sven
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
citation:
ama: 'Hempel F, Reitzig S, Rüsing M, Eng LM. Broadband Coherent Anti-Stokes Raman
Scattering on Solid State Systems. In: OSA Nonlinear Optics 2021. Optica
Publishing Group; 2022. doi:10.1364/nlo.2021.nf2b.6'
apa: Hempel, F., Reitzig, S., Rüsing, M., & Eng, L. M. (2022). Broadband Coherent
Anti-Stokes Raman Scattering on Solid State Systems. OSA Nonlinear Optics 2021.
OSA Nonlinear Optics 2021, Washington D.C., USA; Online. https://doi.org/10.1364/nlo.2021.nf2b.6
bibtex: '@inproceedings{Hempel_Reitzig_Rüsing_Eng_2022, title={Broadband Coherent
Anti-Stokes Raman Scattering on Solid State Systems}, DOI={10.1364/nlo.2021.nf2b.6},
booktitle={OSA Nonlinear Optics 2021}, publisher={Optica Publishing Group}, author={Hempel,
Franz and Reitzig, Sven and Rüsing, Michael and Eng, Lukas M.}, year={2022} }'
chicago: Hempel, Franz, Sven Reitzig, Michael Rüsing, and Lukas M. Eng. “Broadband
Coherent Anti-Stokes Raman Scattering on Solid State Systems.” In OSA Nonlinear
Optics 2021. Optica Publishing Group, 2022. https://doi.org/10.1364/nlo.2021.nf2b.6.
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: 10.1364/nlo.2021.nf2b.6.'
mla: Hempel, Franz, et al. “Broadband Coherent Anti-Stokes Raman Scattering on Solid
State Systems.” OSA Nonlinear Optics 2021, Optica Publishing Group, 2022,
doi:10.1364/nlo.2021.nf2b.6.
short: 'F. Hempel, S. Reitzig, M. Rüsing, L.M. Eng, in: OSA Nonlinear Optics 2021,
Optica Publishing Group, 2022.'
conference:
end_date: 2021-8-13
location: Washington D.C., USA; Online
name: OSA Nonlinear Optics 2021
start_date: 2021-8-9
date_created: 2023-10-11T08:26:05Z
date_updated: 2023-10-13T12:16:11Z
doi: 10.1364/nlo.2021.nf2b.6
language:
- iso: eng
publication: OSA Nonlinear Optics 2021
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Broadband Coherent Anti-Stokes Raman Scattering on Solid State Systems
type: conference
user_id: '22501'
year: '2022'
...