---
_id: '60566'
article_number: '074402'
author:
- first_name: Adriana
full_name: Bocchini, Adriana
id: '58349'
last_name: Bocchini
orcid: 0000-0002-2134-3075
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Laura
full_name: Bollmers, Laura
id: '61375'
last_name: Bollmers
- first_name: Sebastian
full_name: Lengeling, Sebastian
id: '44373'
last_name: Lengeling
- first_name: Philipp
full_name: Mues, Philipp
id: '49772'
last_name: Mues
orcid: 0000-0003-0643-7636
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
citation:
ama: 'Bocchini A, Rüsing M, Bollmers L, et al. Mg dopants in lithium niobate: Defect
models and impact on domain inversion. Physical Review Materials. 2025;9(7).
doi:10.1103/5wz1-bjyr'
apa: 'Bocchini, A., Rüsing, M., Bollmers, L., Lengeling, S., Mues, P., Padberg,
L., Gerstmann, U., Silberhorn, C., Eigner, C., & Schmidt, W. G. (2025). Mg
dopants in lithium niobate: Defect models and impact on domain inversion. Physical
Review Materials, 9(7), Article 074402. https://doi.org/10.1103/5wz1-bjyr'
bibtex: '@article{Bocchini_Rüsing_Bollmers_Lengeling_Mues_Padberg_Gerstmann_Silberhorn_Eigner_Schmidt_2025,
title={Mg dopants in lithium niobate: Defect models and impact on domain inversion},
volume={9}, DOI={10.1103/5wz1-bjyr},
number={7074402}, journal={Physical Review Materials}, publisher={American Physical
Society (APS)}, author={Bocchini, Adriana and Rüsing, Michael and Bollmers, Laura
and Lengeling, Sebastian and Mues, Philipp and Padberg, Laura and Gerstmann, Uwe
and Silberhorn, Christine and Eigner, Christof and Schmidt, Wolf Gero}, year={2025}
}'
chicago: 'Bocchini, Adriana, Michael Rüsing, Laura Bollmers, Sebastian Lengeling,
Philipp Mues, Laura Padberg, Uwe Gerstmann, Christine Silberhorn, Christof Eigner,
and Wolf Gero Schmidt. “Mg Dopants in Lithium Niobate: Defect Models and Impact
on Domain Inversion.” Physical Review Materials 9, no. 7 (2025). https://doi.org/10.1103/5wz1-bjyr.'
ieee: 'A. Bocchini et al., “Mg dopants in lithium niobate: Defect models
and impact on domain inversion,” Physical Review Materials, vol. 9, no.
7, Art. no. 074402, 2025, doi: 10.1103/5wz1-bjyr.'
mla: 'Bocchini, Adriana, et al. “Mg Dopants in Lithium Niobate: Defect Models and
Impact on Domain Inversion.” Physical Review Materials, vol. 9, no. 7,
074402, American Physical Society (APS), 2025, doi:10.1103/5wz1-bjyr.'
short: A. Bocchini, M. Rüsing, L. Bollmers, S. Lengeling, P. Mues, L. Padberg, U.
Gerstmann, C. Silberhorn, C. Eigner, W.G. Schmidt, Physical Review Materials 9
(2025).
date_created: 2025-07-09T09:13:24Z
date_updated: 2026-03-17T17:50:06Z
ddc:
- '530'
department:
- _id: '15'
- _id: '623'
- _id: '295'
- _id: '790'
- _id: '288'
- _id: '230'
- _id: '429'
- _id: '35'
- _id: '170'
- _id: '169'
- _id: '27'
doi: 10.1103/5wz1-bjyr
file:
- access_level: open_access
content_type: application/pdf
creator: adrianab
date_created: 2025-07-09T09:18:45Z
date_updated: 2025-07-10T06:43:34Z
file_id: '60567'
file_name: Mg_dopants_LN_PRM.pdf
file_size: 4175120
relation: main_file
file_date_updated: 2025-07-10T06:43:34Z
has_accepted_license: '1'
intvolume: ' 9'
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://link.aps.org/doi/10.1103/5wz1-bjyr
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '168'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '166'
name: 'TRR 142 - A11: TRR 142 - Subproject A11'
publication: Physical Review Materials
publication_identifier:
issn:
- 2475-9953
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Mg dopants in lithium niobate: Defect models and impact on domain inversion'
type: journal_article
user_id: '22501'
volume: 9
year: '2025'
...
---
_id: '58606'
article_type: original
author:
- first_name: Albert
full_name: Mathew, Albert
last_name: Mathew
- first_name: Rebecca
full_name: Aschwanden, Rebecca
last_name: Aschwanden
- first_name: Aditya
full_name: Tripathi, Aditya
last_name: Tripathi
- first_name: Piyush
full_name: Jangid, Piyush
last_name: Jangid
- first_name: Basudeb
full_name: Sain, Basudeb
last_name: Sain
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Sergey
full_name: Kruk, Sergey
last_name: Kruk
citation:
ama: Mathew A, Aschwanden R, Tripathi A, et al. Nonreciprocal Metasurfaces with
Epsilon-Near-Zero Materials. Nano Letters. Published online 2025. doi:10.1021/acs.nanolett.4c06188
apa: Mathew, A., Aschwanden, R., Tripathi, A., Jangid, P., Sain, B., Zentgraf, T.,
& Kruk, S. (2025). Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials.
Nano Letters. https://doi.org/10.1021/acs.nanolett.4c06188
bibtex: '@article{Mathew_Aschwanden_Tripathi_Jangid_Sain_Zentgraf_Kruk_2025, title={Nonreciprocal
Metasurfaces with Epsilon-Near-Zero Materials}, DOI={10.1021/acs.nanolett.4c06188},
journal={Nano Letters}, publisher={American Chemical Society (ACS)}, author={Mathew,
Albert and Aschwanden, Rebecca and Tripathi, Aditya and Jangid, Piyush and Sain,
Basudeb and Zentgraf, Thomas and Kruk, Sergey}, year={2025} }'
chicago: Mathew, Albert, Rebecca Aschwanden, Aditya Tripathi, Piyush Jangid, Basudeb
Sain, Thomas Zentgraf, and Sergey Kruk. “Nonreciprocal Metasurfaces with Epsilon-Near-Zero
Materials.” Nano Letters, 2025. https://doi.org/10.1021/acs.nanolett.4c06188.
ieee: 'A. Mathew et al., “Nonreciprocal Metasurfaces with Epsilon-Near-Zero
Materials,” Nano Letters, 2025, doi: 10.1021/acs.nanolett.4c06188.'
mla: Mathew, Albert, et al. “Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials.”
Nano Letters, American Chemical Society (ACS), 2025, doi:10.1021/acs.nanolett.4c06188.
short: A. Mathew, R. Aschwanden, A. Tripathi, P. Jangid, B. Sain, T. Zentgraf, S.
Kruk, Nano Letters (2025).
date_created: 2025-02-12T12:54:41Z
date_updated: 2026-04-20T05:06:06Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1021/acs.nanolett.4c06188
external_id:
arxiv:
- '2501.11920'
keyword:
- metasurfaces
- nanophotonics
- nonreciprocity
- optical isolators
- silicon photonics
language:
- iso: eng
main_file_link:
- url: https://pubs.acs.org/doi/full/10.1021/acs.nanolett.4c06188
project:
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '170'
name: 'TRR 142 - B09: TRR 142 - Effiziente Erzeugung mit maßgeschneiderter optischer
Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen
(B09*)'
- _id: '65'
name: 'TRR 142 - A08: TRR 142 - Nichtlineare Kopplung von Zwischenschicht-Exzitonen
in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten
(A08)'
publication: Nano Letters
publication_identifier:
issn:
- 1530-6984
- 1530-6992
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials
type: journal_article
user_id: '30525'
year: '2025'
...
---
_id: '55267'
article_number: '075301'
author:
- first_name: F.
full_name: Schäfer, F.
last_name: Schäfer
- first_name: A.
full_name: Trautmann, A.
last_name: Trautmann
- first_name: C.
full_name: Ngo, C.
last_name: Ngo
- first_name: J. T.
full_name: Steiner, J. T.
last_name: Steiner
- first_name: C.
full_name: Fuchs, C.
last_name: Fuchs
- first_name: K.
full_name: Volz, K.
last_name: Volz
- first_name: F.
full_name: Dobener, F.
last_name: Dobener
- first_name: M.
full_name: Stein, M.
last_name: Stein
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: S.
full_name: Chatterjee, S.
last_name: Chatterjee
citation:
ama: Schäfer F, Trautmann A, Ngo C, et al. Optical Stark effect in type-II semiconductor
heterostructures. Physical Review B. 2024;109(7). doi:10.1103/physrevb.109.075301
apa: Schäfer, F., Trautmann, A., Ngo, C., Steiner, J. T., Fuchs, C., Volz, K., Dobener,
F., Stein, M., Meier, T., & Chatterjee, S. (2024). Optical Stark effect in
type-II semiconductor heterostructures. Physical Review B, 109(7),
Article 075301. https://doi.org/10.1103/physrevb.109.075301
bibtex: '@article{Schäfer_Trautmann_Ngo_Steiner_Fuchs_Volz_Dobener_Stein_Meier_Chatterjee_2024,
title={Optical Stark effect in type-II semiconductor heterostructures}, volume={109},
DOI={10.1103/physrevb.109.075301},
number={7075301}, journal={Physical Review B}, publisher={American Physical Society
(APS)}, author={Schäfer, F. and Trautmann, A. and Ngo, C. and Steiner, J. T. and
Fuchs, C. and Volz, K. and Dobener, F. and Stein, M. and Meier, Torsten and Chatterjee,
S.}, year={2024} }'
chicago: Schäfer, F., A. Trautmann, C. Ngo, J. T. Steiner, C. Fuchs, K. Volz, F.
Dobener, M. Stein, Torsten Meier, and S. Chatterjee. “Optical Stark Effect in
Type-II Semiconductor Heterostructures.” Physical Review B 109, no. 7 (2024).
https://doi.org/10.1103/physrevb.109.075301.
ieee: 'F. Schäfer et al., “Optical Stark effect in type-II semiconductor
heterostructures,” Physical Review B, vol. 109, no. 7, Art. no. 075301,
2024, doi: 10.1103/physrevb.109.075301.'
mla: Schäfer, F., et al. “Optical Stark Effect in Type-II Semiconductor Heterostructures.”
Physical Review B, vol. 109, no. 7, 075301, American Physical Society (APS),
2024, doi:10.1103/physrevb.109.075301.
short: F. Schäfer, A. Trautmann, C. Ngo, J.T. Steiner, C. Fuchs, K. Volz, F. Dobener,
M. Stein, T. Meier, S. Chatterjee, Physical Review B 109 (2024).
date_created: 2024-07-15T09:47:27Z
date_updated: 2024-07-15T09:49:41Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1103/physrevb.109.075301
intvolume: ' 109'
issue: '7'
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '165'
grant_number: '231447078'
name: 'TRR 142 - A10: TRR 142 - Nichtlinearitäten von atomar dünnen Übergangsmetall-Dichalkogeniden
in starken Feldern (A10)'
publication: Physical Review B
publication_identifier:
issn:
- 2469-9950
- 2469-9969
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Optical Stark effect in type-II semiconductor heterostructures
type: journal_article
user_id: '16199'
volume: 109
year: '2024'
...
---
_id: '54668'
abstract:
- lang: eng
text: Samples of dielectric optical waveguides of rib or strip type in thin-film
lithium niobate (TFLN) technology are characterized with respect to their optical
loss using the Fabry-Pérot method. Attributing the losses mainly to sidewall roughness,
we employ a simple perturbational procedure, based on rigorously computed mode
profiles of idealized channels, to estimate the attenuation for waveguides with
different cross sections. A single fit parameter suffices for an adequate modelling
of the effect of the waveguide geometry on the loss levels.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Silia
full_name: Babel, Silia
id: '63231'
last_name: Babel
orcid: https://orcid.org/0000-0002-1568-2580
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Babel S, Farheen H, et al. Estimation of losses caused by sidewall
roughness in thin-film lithium niobate rib and strip waveguides. Optics Express.
2024;32(13):22878. doi:10.1364/oe.521766
apa: Hammer, M., Babel, S., Farheen, H., Padberg, L., Scheytt, J. C., Silberhorn,
C., & Förstner, J. (2024). Estimation of losses caused by sidewall roughness
in thin-film lithium niobate rib and strip waveguides. Optics Express,
32(13), 22878. https://doi.org/10.1364/oe.521766
bibtex: '@article{Hammer_Babel_Farheen_Padberg_Scheytt_Silberhorn_Förstner_2024,
title={Estimation of losses caused by sidewall roughness in thin-film lithium
niobate rib and strip waveguides}, volume={32}, DOI={10.1364/oe.521766},
number={13}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Hammer,
Manfred and Babel, Silia and Farheen, Henna and Padberg, Laura and Scheytt, J.
Christoph and Silberhorn, Christine and Förstner, Jens}, year={2024}, pages={22878}
}'
chicago: 'Hammer, Manfred, Silia Babel, Henna Farheen, Laura Padberg, J. Christoph
Scheytt, Christine Silberhorn, and Jens Förstner. “Estimation of Losses Caused
by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.”
Optics Express 32, no. 13 (2024): 22878. https://doi.org/10.1364/oe.521766.'
ieee: 'M. Hammer et al., “Estimation of losses caused by sidewall roughness
in thin-film lithium niobate rib and strip waveguides,” Optics Express,
vol. 32, no. 13, p. 22878, 2024, doi: 10.1364/oe.521766.'
mla: Hammer, Manfred, et al. “Estimation of Losses Caused by Sidewall Roughness
in Thin-Film Lithium Niobate Rib and Strip Waveguides.” Optics Express,
vol. 32, no. 13, Optica Publishing Group, 2024, p. 22878, doi:10.1364/oe.521766.
short: M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn,
J. Förstner, Optics Express 32 (2024) 22878.
date_created: 2024-06-10T11:18:06Z
date_updated: 2024-07-22T07:43:02Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
- _id: '623'
- _id: '263'
- _id: '288'
doi: 10.1364/oe.521766
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-06-10T11:25:00Z
date_updated: 2024-06-10T11:25:00Z
file_id: '54669'
file_name: 2024-06 Hammer - Optics Express - Estimation of losses caused by sidewall
roughness in thin-film lithium niobate rib and strip waveguides.pdf
file_size: 4004782
relation: main_file
file_date_updated: 2024-06-10T11:25:00Z
has_accepted_license: '1'
intvolume: ' 32'
issue: '13'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: '22878'
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '175'
grant_number: '231447078'
name: 'TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen
Modulatoren auf Basis von CMOS und LNOI (C11*)'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Estimation of losses caused by sidewall roughness in thin-film lithium niobate
rib and strip waveguides
type: journal_article
user_id: '158'
volume: 32
year: '2024'
...
---
_id: '55268'
author:
- first_name: Hendrik
full_name: Rose, Hendrik
id: '55958'
last_name: Rose
orcid: 0000-0002-3079-5428
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: 'Rose H, Sharapova PR, Meier T. Microscopic simulations of the dynamics of
excitonic many-body correlations coupled to quantum light. In: Betz M, Elezzabi
AY, eds. Ultrafast Phenomena and Nanophotonics XXVIII. SPIE; 2024. doi:10.1117/12.2690245'
apa: Rose, H., Sharapova, P. R., & Meier, T. (2024). Microscopic simulations
of the dynamics of excitonic many-body correlations coupled to quantum light.
In M. Betz & A. Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics
XXVIII. SPIE. https://doi.org/10.1117/12.2690245
bibtex: '@inproceedings{Rose_Sharapova_Meier_2024, title={Microscopic simulations
of the dynamics of excitonic many-body correlations coupled to quantum light},
DOI={10.1117/12.2690245}, booktitle={Ultrafast
Phenomena and Nanophotonics XXVIII}, publisher={SPIE}, author={Rose, Hendrik and
Sharapova, Polina R. and Meier, Torsten}, editor={Betz, Markus and Elezzabi, Abdulhakem
Y.}, year={2024} }'
chicago: Rose, Hendrik, Polina R. Sharapova, and Torsten Meier. “Microscopic Simulations
of the Dynamics of Excitonic Many-Body Correlations Coupled to Quantum Light.”
In Ultrafast Phenomena and Nanophotonics XXVIII, edited by Markus Betz
and Abdulhakem Y. Elezzabi. SPIE, 2024. https://doi.org/10.1117/12.2690245.
ieee: 'H. Rose, P. R. Sharapova, and T. Meier, “Microscopic simulations of the dynamics
of excitonic many-body correlations coupled to quantum light,” in Ultrafast
Phenomena and Nanophotonics XXVIII, 2024, doi: 10.1117/12.2690245.'
mla: Rose, Hendrik, et al. “Microscopic Simulations of the Dynamics of Excitonic
Many-Body Correlations Coupled to Quantum Light.” Ultrafast Phenomena and Nanophotonics
XXVIII, edited by Markus Betz and Abdulhakem Y. Elezzabi, SPIE, 2024, doi:10.1117/12.2690245.
short: 'H. Rose, P.R. Sharapova, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast
Phenomena and Nanophotonics XXVIII, SPIE, 2024.'
date_created: 2024-07-15T10:26:04Z
date_updated: 2024-08-30T11:59:34Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '623'
doi: 10.1117/12.2690245
editor:
- first_name: Markus
full_name: Betz, Markus
last_name: Betz
- first_name: Abdulhakem Y.
full_name: Elezzabi, Abdulhakem Y.
last_name: Elezzabi
language:
- iso: eng
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '59'
grant_number: '231447078'
name: 'TRR 142 - A02: TRR 142 - Nichtlineare Spektroskopie von Halbleiter-Nanostrukturen
mit Quantenlicht (A02)'
publication: Ultrafast Phenomena and Nanophotonics XXVIII
publication_status: published
publisher: SPIE
status: public
title: Microscopic simulations of the dynamics of excitonic many-body correlations
coupled to quantum light
type: conference
user_id: '16199'
year: '2024'
...
---
_id: '55989'
abstract:
- lang: eng
text: Phased arrays are vital in communication systems and have received significant
interest in the field of optoelectronics and photonics, enabling a wide range
of applications such as LiDAR, holography, wireless communication, etc. In this
work, we present a blazed grating antenna that is optimized to have upward radiation
efficiency as high as 80% with a compact footprint of 3.5 μm × 2 μm at an operational
wavelength of 1.55 μm. Our numerical investigations demonstrate that this antenna
in a 64 × 64 phased array configuration is capable of producing desired far-field
radiation patterns. Additionally, our antenna possesses a low side lobe level
of -9.7 dB and a negligible reflection efficiency of under 1%, making it an attractive
candidate for integrated optical phased arrays.
article_type: original
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Suraj
full_name: Joshi, Suraj
last_name: Joshi
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. An efficient
compact blazed grating antenna for optical phased arrays. Journal of Physics:
Photonics. 2024;6:045010. doi:10.1088/2515-7647/ad6ed4'
apa: 'Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., & Förstner,
J. (2024). An efficient compact blazed grating antenna for optical phased arrays.
Journal of Physics: Photonics, 6, 045010. https://doi.org/10.1088/2515-7647/ad6ed4'
bibtex: '@article{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2024, title={An
efficient compact blazed grating antenna for optical phased arrays}, volume={6},
DOI={10.1088/2515-7647/ad6ed4},
journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Farheen,
Henna and Joshi, Suraj and Scheytt, J. Christoph and Myroshnychenko, Viktor and
Förstner, Jens}, year={2024}, pages={045010} }'
chicago: 'Farheen, Henna, Suraj Joshi, J. Christoph Scheytt, Viktor Myroshnychenko,
and Jens Förstner. “An Efficient Compact Blazed Grating Antenna for Optical Phased
Arrays.” Journal of Physics: Photonics 6 (2024): 045010. https://doi.org/10.1088/2515-7647/ad6ed4.'
ieee: 'H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
“An efficient compact blazed grating antenna for optical phased arrays,” Journal
of Physics: Photonics, vol. 6, p. 045010, 2024, doi: 10.1088/2515-7647/ad6ed4.'
mla: 'Farheen, Henna, et al. “An Efficient Compact Blazed Grating Antenna for Optical
Phased Arrays.” Journal of Physics: Photonics, vol. 6, IOP Publishing,
2024, p. 045010, doi:10.1088/2515-7647/ad6ed4.'
short: 'H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal
of Physics: Photonics 6 (2024) 045010.'
date_created: 2024-09-02T12:08:18Z
date_updated: 2024-09-02T12:23:55Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
- _id: '58'
doi: 10.1088/2515-7647/ad6ed4
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-09-02T12:13:55Z
date_updated: 2024-09-02T12:13:55Z
file_id: '55990'
file_name: 2024-08 Farheen - JPhys Photonics - An efficient compact blazed grating
antenna for optical phased arrays (official version).pdf
file_size: 1492402
relation: main_file
file_date_updated: 2024-09-02T12:13:55Z
has_accepted_license: '1'
intvolume: ' 6'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
oa: '1'
page: '045010'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 'Journal of Physics: Photonics'
publication_identifier:
issn:
- 2515-7647
publication_status: published
publisher: IOP Publishing
status: public
title: An efficient compact blazed grating antenna for optical phased arrays
type: journal_article
user_id: '158'
volume: 6
year: '2024'
...
---
_id: '56193'
abstract:
- lang: eng
text: 'Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media
are consid-ered, for operation in the linear regime. We outline and implement
a largely analytic procedure forrigorous modal analysis of three-layer slabs with
birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem
separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in
X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant
TE or TM polarization, and with effective indices that depend on the propagation
directionof the modes, relative to the crystal axes. Strong hybridization can
be observed for near degeneratemodes in singular configurations without vertical
symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same
symmetry class. Dispersion curves for slab thickness and propa-gation angle are
discussed, for slabs with oxide and air cover. '
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Farheen H, Förstner J. Guided modes of thin-film lithium niobate
slabs. Optics Continuum. Published online 2024:532822. doi:10.1364/optcon.532822
apa: Hammer, M., Farheen, H., & Förstner, J. (2024). Guided modes of thin-film
lithium niobate slabs. Optics Continuum, 532822. https://doi.org/10.1364/optcon.532822
bibtex: '@article{Hammer_Farheen_Förstner_2024, title={Guided modes of thin-film
lithium niobate slabs}, DOI={10.1364/optcon.532822},
journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer,
Manfred and Farheen, Henna and Förstner, Jens}, year={2024}, pages={532822} }'
chicago: Hammer, Manfred, Henna Farheen, and Jens Förstner. “Guided Modes of Thin-Film
Lithium Niobate Slabs.” Optics Continuum, 2024, 532822. https://doi.org/10.1364/optcon.532822.
ieee: 'M. Hammer, H. Farheen, and J. Förstner, “Guided modes of thin-film lithium
niobate slabs,” Optics Continuum, p. 532822, 2024, doi: 10.1364/optcon.532822.'
mla: Hammer, Manfred, et al. “Guided Modes of Thin-Film Lithium Niobate Slabs.”
Optics Continuum, Optica Publishing Group, 2024, p. 532822, doi:10.1364/optcon.532822.
short: M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.
date_created: 2024-09-21T09:17:16Z
date_updated: 2024-11-04T17:07:27Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1364/optcon.532822
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2024-11-04T17:05:30Z
date_updated: 2024-11-04T17:05:30Z
file_id: '56864'
file_name: 2024-11 Hammer - Optics Continuum - Guided modes of thin-film lithium
niobate slabs.pdf
file_size: 4399685
relation: main_file
success: 1
file_date_updated: 2024-11-04T17:05:30Z
has_accepted_license: '1'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: '532822'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
publication: Optics Continuum
publication_identifier:
issn:
- 2770-0208
publication_status: published
publisher: Optica Publishing Group
status: public
title: Guided modes of thin-film lithium niobate slabs
type: journal_article
user_id: '158'
year: '2024'
...
---
_id: '60023'
author:
- first_name: Helene
full_name: Wetter, Helene
last_name: Wetter
- first_name: Wenlong
full_name: Gao, Wenlong
last_name: Gao
- first_name: Falk
full_name: Rehberg, Falk
last_name: Rehberg
- first_name: Jan
full_name: Wingenbach, Jan
id: '69187'
last_name: Wingenbach
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: 'Wetter H, Gao W, Rehberg F, Wingenbach J, Schumacher S, Zentgraf T. Dielectric
metasurface for wave-vector variant and circular polarization dependent transmission.
In: Proceedings of The 14th International Conference on Metamaterials, Photonic
Crystals and Plasmonics. ; 2024.'
apa: Wetter, H., Gao, W., Rehberg, F., Wingenbach, J., Schumacher, S., & Zentgraf,
T. (2024). Dielectric metasurface for wave-vector variant and circular polarization
dependent transmission. Proceedings of The 14th International Conference on
Metamaterials, Photonic Crystals and Plasmonics. META 2024 - The 14th International
Conference on Metamaterials, Photonic Crystals and Plasmonics, Toyama, Japan.
bibtex: '@inproceedings{Wetter_Gao_Rehberg_Wingenbach_Schumacher_Zentgraf_2024,
title={Dielectric metasurface for wave-vector variant and circular polarization
dependent transmission}, booktitle={Proceedings of The 14th International Conference
on Metamaterials, Photonic Crystals and Plasmonics}, author={Wetter, Helene and
Gao, Wenlong and Rehberg, Falk and Wingenbach, Jan and Schumacher, Stefan and
Zentgraf, Thomas}, year={2024} }'
chicago: Wetter, Helene, Wenlong Gao, Falk Rehberg, Jan Wingenbach, Stefan Schumacher,
and Thomas Zentgraf. “Dielectric Metasurface for Wave-Vector Variant and Circular
Polarization Dependent Transmission.” In Proceedings of The 14th International
Conference on Metamaterials, Photonic Crystals and Plasmonics, 2024.
ieee: H. Wetter, W. Gao, F. Rehberg, J. Wingenbach, S. Schumacher, and T. Zentgraf,
“Dielectric metasurface for wave-vector variant and circular polarization dependent
transmission,” presented at the META 2024 - The 14th International Conference
on Metamaterials, Photonic Crystals and Plasmonics, Toyama, Japan, 2024.
mla: Wetter, Helene, et al. “Dielectric Metasurface for Wave-Vector Variant and
Circular Polarization Dependent Transmission.” Proceedings of The 14th International
Conference on Metamaterials, Photonic Crystals and Plasmonics, 2024.
short: 'H. Wetter, W. Gao, F. Rehberg, J. Wingenbach, S. Schumacher, T. Zentgraf,
in: Proceedings of The 14th International Conference on Metamaterials, Photonic
Crystals and Plasmonics, 2024.'
conference:
end_date: 2024-07-19
location: Toyama, Japan
name: META 2024 - The 14th International Conference on Metamaterials, Photonic Crystals
and Plasmonics
start_date: 2024-07-16
date_created: 2025-05-23T06:30:36Z
date_updated: 2025-05-23T06:34:16Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
language:
- iso: eng
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '164'
grant_number: '231447078'
name: 'TRR 142 - A09: TRR 142 - Erzeugung von Drei-Photonen-Zuständen mit On-Chip
Pumplichtunterdrückung in topologischen Wellenleitern (A09*)'
publication: Proceedings of The 14th International Conference on Metamaterials, Photonic
Crystals and Plasmonics
publication_identifier:
issn:
- 2429-1390
status: public
title: Dielectric metasurface for wave-vector variant and circular polarization dependent
transmission
type: conference
user_id: '30525'
year: '2024'
...
---
_id: '57410'
article_number: '195306'
author:
- first_name: J.
full_name: Röder, J.
last_name: Röder
- first_name: M.
full_name: Gerhard, M.
last_name: Gerhard
- first_name: C.
full_name: Fuchs, C.
last_name: Fuchs
- first_name: W.
full_name: Stolz, W.
last_name: Stolz
- first_name: W.
full_name: Heimbrodt, W.
last_name: Heimbrodt
- first_name: M.
full_name: Koch, M.
last_name: Koch
- first_name: C.
full_name: Ngo, C.
last_name: Ngo
- first_name: J. T.
full_name: Steiner, J. T.
last_name: Steiner
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: Röder J, Gerhard M, Fuchs C, et al. Charge transfer magnetoexcitons in magnetoabsorption
spectra of asymmetric type-II double quantum wells. Physical Review B.
2024;110(19). doi:10.1103/physrevb.110.195306
apa: Röder, J., Gerhard, M., Fuchs, C., Stolz, W., Heimbrodt, W., Koch, M., Ngo,
C., Steiner, J. T., & Meier, T. (2024). Charge transfer magnetoexcitons in
magnetoabsorption spectra of asymmetric type-II double quantum wells. Physical
Review B, 110(19), Article 195306. https://doi.org/10.1103/physrevb.110.195306
bibtex: '@article{Röder_Gerhard_Fuchs_Stolz_Heimbrodt_Koch_Ngo_Steiner_Meier_2024,
title={Charge transfer magnetoexcitons in magnetoabsorption spectra of asymmetric
type-II double quantum wells}, volume={110}, DOI={10.1103/physrevb.110.195306},
number={19195306}, journal={Physical Review B}, publisher={American Physical Society
(APS)}, author={Röder, J. and Gerhard, M. and Fuchs, C. and Stolz, W. and Heimbrodt,
W. and Koch, M. and Ngo, C. and Steiner, J. T. and Meier, Torsten}, year={2024}
}'
chicago: Röder, J., M. Gerhard, C. Fuchs, W. Stolz, W. Heimbrodt, M. Koch, C. Ngo,
J. T. Steiner, and Torsten Meier. “Charge Transfer Magnetoexcitons in Magnetoabsorption
Spectra of Asymmetric Type-II Double Quantum Wells.” Physical Review B
110, no. 19 (2024). https://doi.org/10.1103/physrevb.110.195306.
ieee: 'J. Röder et al., “Charge transfer magnetoexcitons in magnetoabsorption
spectra of asymmetric type-II double quantum wells,” Physical Review B,
vol. 110, no. 19, Art. no. 195306, 2024, doi: 10.1103/physrevb.110.195306.'
mla: Röder, J., et al. “Charge Transfer Magnetoexcitons in Magnetoabsorption Spectra
of Asymmetric Type-II Double Quantum Wells.” Physical Review B, vol. 110,
no. 19, 195306, American Physical Society (APS), 2024, doi:10.1103/physrevb.110.195306.
short: J. Röder, M. Gerhard, C. Fuchs, W. Stolz, W. Heimbrodt, M. Koch, C. Ngo,
J.T. Steiner, T. Meier, Physical Review B 110 (2024).
date_created: 2024-11-26T06:46:51Z
date_updated: 2024-11-26T06:50:45Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
doi: 10.1103/physrevb.110.195306
intvolume: ' 110'
issue: '19'
language:
- iso: eng
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '165'
grant_number: '231447078'
name: 'TRR 142 - A10: TRR 142 - Nichtlinearitäten von atomar dünnen Übergangsmetall-Dichalkogeniden
in starken Feldern (A10)'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physical Review B
publication_identifier:
issn:
- 2469-9950
- 2469-9969
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Charge transfer magnetoexcitons in magnetoabsorption spectra of asymmetric
type-II double quantum wells
type: journal_article
user_id: '16199'
volume: 110
year: '2024'
...
---
_id: '61251'
abstract:
- lang: eng
text: We theoretically investigate strategies for the deterministic creation
of trains of time-bin entangled photons using an individual quantum emitter described
by a Λ-type electronic system. We explicitly demonstrate the theoretical generation
of linear cluster states with substantial numbers of entangled photonic qubits
in full microscopic numerical simulations. The underlying scheme is based on the
manipulation of ground state coherences through precise optical driving. One important
finding is that the most easily accessible quality metrics, the achievable rotation
fidelities, fall short in assessing the actual quantum correlations of the emitted
photons in the face of losses. To address this, we explicitly calculate stabilizer
generator expectation values as a superior gauge for the quantum properties of
the generated many-photon state. With widespread applicability in other emitter
and excitation–emission schemes also, our work lays the conceptual foundations
for an in-depth practical analysis of time-bin entanglement based on full numerical
simulations with predictive capabilities for realistic systems and setups, including
losses and imperfections. The specific results shown in the present work illustrate
that with controlled minimization of losses and realistic system parameters for
quantum-dot type systems, useful linear cluster states of significant lengths
can be generated in the calculations, discussing the possibility of scalability
for quantum information processing endeavors.
article_number: '036110'
author:
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Nikolas
full_name: Köcher, Nikolas
id: '79191'
last_name: Köcher
- first_name: Nils
full_name: Heinisch, Nils
id: '90283'
last_name: Heinisch
orcid: 0009-0006-0984-2097
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic
generation of linear photonic cluster states. APL Quantum. 2024;1(3). doi:10.1063/5.0214197
apa: Bauch, D., Köcher, N., Heinisch, N., & Schumacher, S. (2024). Time-bin
entanglement in the deterministic generation of linear photonic cluster states.
APL Quantum, 1(3), Article 036110. https://doi.org/10.1063/5.0214197
bibtex: '@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement
in the deterministic generation of linear photonic cluster states}, volume={1},
DOI={10.1063/5.0214197}, number={3036110},
journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher,
Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }'
chicago: Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin
Entanglement in the Deterministic Generation of Linear Photonic Cluster States.”
APL Quantum 1, no. 3 (2024). https://doi.org/10.1063/5.0214197.
ieee: 'D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement
in the deterministic generation of linear photonic cluster states,” APL Quantum,
vol. 1, no. 3, Art. no. 036110, 2024, doi: 10.1063/5.0214197.'
mla: Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation
of Linear Photonic Cluster States.” APL Quantum, vol. 1, no. 3, 036110,
AIP Publishing, 2024, doi:10.1063/5.0214197.
short: D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).
date_created: 2025-09-12T11:08:59Z
date_updated: 2025-09-12T11:11:32Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
- _id: '623'
doi: 10.1063/5.0214197
intvolume: ' 1'
issue: '3'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '173'
name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: APL Quantum
publication_identifier:
issn:
- 2835-0103
publication_status: published
publisher: AIP Publishing
status: public
title: Time-bin entanglement in the deterministic generation of linear photonic cluster
states
type: journal_article
user_id: '16199'
volume: 1
year: '2024'
...
---
_id: '61253'
abstract:
- lang: eng
text: "In the SUPER scheme (Swing-UP of the quantum EmitteR population),
excitation of a quantum emitter is achieved with two off-resonant, red-detuned
laser pulses. This allows the generation of high-quality single photons without
the need of complex laser stray light suppression or careful spectral filtering.
In the present work, we extend this promising method to quantum emitters, specifically
semiconductor quantum dots, inside a resonant optical cavity. A significant advantage
of the SUPER scheme is identified in that it eliminates re-excitation of the quantum
emitter by suppressing photon emission during the excitation cycle. This, in turn,
leads to almost ideal single-photon purity, overcoming a major factor typically
limiting the quality of photons generated with quantum emitters in high-quality
cavities. We further find that for cavity-mediated biexciton emission of degenerate
photon pairs, the SUPER scheme leads to near-perfect biexciton initialization
with very high values of polarization entanglement of emitted photon pairs.\r\n
\ \r\n \r\n \r\n
\ \r\n Published
by the American Physical Society\r\n 2024\r\n
\ \r\n \r\n
\ "
article_number: L012017
author:
- first_name: Nils
full_name: Heinisch, Nils
id: '90283'
last_name: Heinisch
orcid: 0009-0006-0984-2097
- first_name: Nikolas
full_name: Köcher, Nikolas
id: '79191'
last_name: Köcher
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: 'Heinisch N, Köcher N, Bauch D, Schumacher S. Swing-up dynamics in quantum
emitter cavity systems: Near ideal single photons and entangled photon pairs.
Physical Review Research. 2024;6(1). doi:10.1103/physrevresearch.6.l012017'
apa: 'Heinisch, N., Köcher, N., Bauch, D., & Schumacher, S. (2024). Swing-up
dynamics in quantum emitter cavity systems: Near ideal single photons and entangled
photon pairs. Physical Review Research, 6(1), Article L012017. https://doi.org/10.1103/physrevresearch.6.l012017'
bibtex: '@article{Heinisch_Köcher_Bauch_Schumacher_2024, title={Swing-up dynamics
in quantum emitter cavity systems: Near ideal single photons and entangled photon
pairs}, volume={6}, DOI={10.1103/physrevresearch.6.l012017},
number={1L012017}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Heinisch, Nils and Köcher, Nikolas and Bauch, David and
Schumacher, Stefan}, year={2024} }'
chicago: 'Heinisch, Nils, Nikolas Köcher, David Bauch, and Stefan Schumacher. “Swing-up
Dynamics in Quantum Emitter Cavity Systems: Near Ideal Single Photons and Entangled
Photon Pairs.” Physical Review Research 6, no. 1 (2024). https://doi.org/10.1103/physrevresearch.6.l012017.'
ieee: 'N. Heinisch, N. Köcher, D. Bauch, and S. Schumacher, “Swing-up dynamics in
quantum emitter cavity systems: Near ideal single photons and entangled photon
pairs,” Physical Review Research, vol. 6, no. 1, Art. no. L012017, 2024,
doi: 10.1103/physrevresearch.6.l012017.'
mla: 'Heinisch, Nils, et al. “Swing-up Dynamics in Quantum Emitter Cavity Systems:
Near Ideal Single Photons and Entangled Photon Pairs.” Physical Review Research,
vol. 6, no. 1, L012017, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.l012017.'
short: N. Heinisch, N. Köcher, D. Bauch, S. Schumacher, Physical Review Research
6 (2024).
date_created: 2025-09-12T11:16:31Z
date_updated: 2025-09-12T11:18:05Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1103/physrevresearch.6.l012017
intvolume: ' 6'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '173'
name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons
and entangled photon pairs'
type: journal_article
user_id: '16199'
volume: 6
year: '2024'
...
---
_id: '61255'
abstract:
- lang: eng
text: "Abstract\r\n Topological states
have been widely investigated in different types of systems and lattices. In the
present work, we report on topological edge states in double-wave (DW) chains,
which can be described by a generalized Aubry-André-Harper (AAH) model. For the
specific system of a driven-dissipative exciton polariton system we show that
in such potential chains, different types of edge states can form. For resonant
optical excitation, we further find that the optical nonlinearity leads to a multistability
of different edge states. This includes topologically protected edge states evolved
directly from individual linear eigenstates as well as additional edge states
that originate from nonlinearity-induced localization of bulk states. Extending
the system into two dimensions (2D) by stacking horizontal DW chains in the vertical
direction, we also create 2D multi-wave lattices. In such 2D lattices multiple
Su–Schrieffer–Heeger (SSH) chains appear along the vertical direction. The combination
of DW chains in the horizonal and SSH chains in the vertical direction then results
in the formation of higher-order topological insulator corner states. Multistable
corner states emerge in the nonlinear regime."
author:
- first_name: Tobias
full_name: Schneider, Tobias
last_name: Schneider
- first_name: Wenlong
full_name: Gao, Wenlong
id: '78853'
last_name: Gao
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Xuekai
full_name: Ma, Xuekai
id: '59416'
last_name: Ma
citation:
ama: Schneider T, Gao W, Zentgraf T, Schumacher S, Ma X. Topological edge and corner
states in coupled wave lattices in nonlinear polariton condensates. Nanophotonics.
2024;13(4):509-518. doi:10.1515/nanoph-2023-0556
apa: Schneider, T., Gao, W., Zentgraf, T., Schumacher, S., & Ma, X. (2024).
Topological edge and corner states in coupled wave lattices in nonlinear polariton
condensates. Nanophotonics, 13(4), 509–518. https://doi.org/10.1515/nanoph-2023-0556
bibtex: '@article{Schneider_Gao_Zentgraf_Schumacher_Ma_2024, title={Topological
edge and corner states in coupled wave lattices in nonlinear polariton condensates},
volume={13}, DOI={10.1515/nanoph-2023-0556},
number={4}, journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Schneider,
Tobias and Gao, Wenlong and Zentgraf, Thomas and Schumacher, Stefan and Ma, Xuekai},
year={2024}, pages={509–518} }'
chicago: 'Schneider, Tobias, Wenlong Gao, Thomas Zentgraf, Stefan Schumacher, and
Xuekai Ma. “Topological Edge and Corner States in Coupled Wave Lattices in Nonlinear
Polariton Condensates.” Nanophotonics 13, no. 4 (2024): 509–18. https://doi.org/10.1515/nanoph-2023-0556.'
ieee: 'T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, and X. Ma, “Topological
edge and corner states in coupled wave lattices in nonlinear polariton condensates,”
Nanophotonics, vol. 13, no. 4, pp. 509–518, 2024, doi: 10.1515/nanoph-2023-0556.'
mla: Schneider, Tobias, et al. “Topological Edge and Corner States in Coupled Wave
Lattices in Nonlinear Polariton Condensates.” Nanophotonics, vol. 13, no.
4, Walter de Gruyter GmbH, 2024, pp. 509–18, doi:10.1515/nanoph-2023-0556.
short: T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, X. Ma, Nanophotonics 13
(2024) 509–518.
date_created: 2025-09-12T11:19:22Z
date_updated: 2025-09-12T11:22:41Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1515/nanoph-2023-0556
intvolume: ' 13'
issue: '4'
language:
- iso: eng
page: 509-518
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '55'
name: TRR 142 - Project Area B
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
- _id: '170'
name: 'TRR 142; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage
der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen'
publication: Nanophotonics
publication_identifier:
issn:
- 2192-8614
publication_status: published
publisher: Walter de Gruyter GmbH
status: public
title: Topological edge and corner states in coupled wave lattices in nonlinear polariton
condensates
type: journal_article
user_id: '16199'
volume: 13
year: '2024'
...
---
_id: '61257'
abstract:
- lang: eng
text: "Exceptional points (EPs), with their intriguing spectral topology,
have attracted considerable attention in a broad range of physical systems, with
potential sensing applications driving much of the present research in this field.
Here, we investigate spectral topology and EPs in systems with significant nonlinearity,
exemplified by a nonequilibrium exciton-polariton condensate. With the possibility
to control loss and gain and nonlinearity by optical means, this system allows
for a comprehensive analysis of the interplay of nonlinearities (Kerr type and
saturable gain) and non-Hermiticity. Not only do we find that EPs can be intentionally
shifted in parameter space by the saturable gain, but we also observe intriguing
rotations and intersections of Riemann surfaces and find nonlinearity-enhanced
sensing capabilities. With this, our results illustrate the potential of tailoring
spectral topology and related phenomena in non-Hermitian systems by nonlinearity.\r\n
\ \r\n \r\n \r\n
\ \r\n Published
by the American Physical Society\r\n 2024\r\n
\ \r\n \r\n
\ "
article_number: '013148'
author:
- first_name: Jan
full_name: Wingenbach, Jan
id: '69187'
last_name: Wingenbach
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Xuekai
full_name: Ma, Xuekai
id: '59416'
last_name: Ma
citation:
ama: Wingenbach J, Schumacher S, Ma X. Manipulating spectral topology and exceptional
points by nonlinearity in non-Hermitian polariton systems. Physical Review
Research. 2024;6(1). doi:10.1103/physrevresearch.6.013148
apa: Wingenbach, J., Schumacher, S., & Ma, X. (2024). Manipulating spectral
topology and exceptional points by nonlinearity in non-Hermitian polariton systems.
Physical Review Research, 6(1), Article 013148. https://doi.org/10.1103/physrevresearch.6.013148
bibtex: '@article{Wingenbach_Schumacher_Ma_2024, title={Manipulating spectral topology
and exceptional points by nonlinearity in non-Hermitian polariton systems}, volume={6},
DOI={10.1103/physrevresearch.6.013148},
number={1013148}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Wingenbach, Jan and Schumacher, Stefan and Ma, Xuekai},
year={2024} }'
chicago: Wingenbach, Jan, Stefan Schumacher, and Xuekai Ma. “Manipulating Spectral
Topology and Exceptional Points by Nonlinearity in Non-Hermitian Polariton Systems.”
Physical Review Research 6, no. 1 (2024). https://doi.org/10.1103/physrevresearch.6.013148.
ieee: 'J. Wingenbach, S. Schumacher, and X. Ma, “Manipulating spectral topology
and exceptional points by nonlinearity in non-Hermitian polariton systems,” Physical
Review Research, vol. 6, no. 1, Art. no. 013148, 2024, doi: 10.1103/physrevresearch.6.013148.'
mla: Wingenbach, Jan, et al. “Manipulating Spectral Topology and Exceptional Points
by Nonlinearity in Non-Hermitian Polariton Systems.” Physical Review Research,
vol. 6, no. 1, 013148, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.013148.
short: J. Wingenbach, S. Schumacher, X. Ma, Physical Review Research 6 (2024).
date_created: 2025-09-12T11:23:33Z
date_updated: 2025-09-12T11:24:59Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
doi: 10.1103/physrevresearch.6.013148
intvolume: ' 6'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian
polariton systems
type: journal_article
user_id: '16199'
volume: 6
year: '2024'
...
---
_id: '61357'
author:
- first_name: Marvin
full_name: Krenz, Marvin
last_name: Krenz
- first_name: Simone
full_name: Sanna, Simone
last_name: Sanna
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
citation:
ama: Krenz M, Sanna S, Gerstmann U, Schmidt WG. Understanding and Improving Triplet
Exciton Transfer in Sensitized Silicon Solar Cells. The Journal of Physical
Chemistry C. 2024;128(41):17774-17778. doi:10.1021/acs.jpcc.4c05446
apa: Krenz, M., Sanna, S., Gerstmann, U., & Schmidt, W. G. (2024). Understanding
and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells. The
Journal of Physical Chemistry C, 128(41), 17774–17778. https://doi.org/10.1021/acs.jpcc.4c05446
bibtex: '@article{Krenz_Sanna_Gerstmann_Schmidt_2024, title={Understanding and Improving
Triplet Exciton Transfer in Sensitized Silicon Solar Cells}, volume={128}, DOI={10.1021/acs.jpcc.4c05446},
number={41}, journal={The Journal of Physical Chemistry C}, publisher={American
Chemical Society (ACS)}, author={Krenz, Marvin and Sanna, Simone and Gerstmann,
Uwe and Schmidt, Wolf Gero}, year={2024}, pages={17774–17778} }'
chicago: 'Krenz, Marvin, Simone Sanna, Uwe Gerstmann, and Wolf Gero Schmidt. “Understanding
and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells.” The
Journal of Physical Chemistry C 128, no. 41 (2024): 17774–78. https://doi.org/10.1021/acs.jpcc.4c05446.'
ieee: 'M. Krenz, S. Sanna, U. Gerstmann, and W. G. Schmidt, “Understanding and Improving
Triplet Exciton Transfer in Sensitized Silicon Solar Cells,” The Journal of
Physical Chemistry C, vol. 128, no. 41, pp. 17774–17778, 2024, doi: 10.1021/acs.jpcc.4c05446.'
mla: Krenz, Marvin, et al. “Understanding and Improving Triplet Exciton Transfer
in Sensitized Silicon Solar Cells.” The Journal of Physical Chemistry C,
vol. 128, no. 41, American Chemical Society (ACS), 2024, pp. 17774–78, doi:10.1021/acs.jpcc.4c05446.
short: M. Krenz, S. Sanna, U. Gerstmann, W.G. Schmidt, The Journal of Physical Chemistry
C 128 (2024) 17774–17778.
date_created: 2025-09-18T11:32:33Z
date_updated: 2025-09-18T11:34:21Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '230'
- _id: '429'
- _id: '35'
- _id: '27'
doi: 10.1021/acs.jpcc.4c05446
intvolume: ' 128'
issue: '41'
language:
- iso: eng
page: 17774-17778
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '55'
name: TRR 142 - Project Area B
- _id: '166'
name: TRR 142 - Subproject A11
- _id: '168'
name: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat
(B07*)
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon
Solar Cells
type: journal_article
user_id: '16199'
volume: 128
year: '2024'
...
---
_id: '62916'
author:
- first_name: Hongdan
full_name: Zhang, Hongdan
last_name: Zhang
- first_name: Ruixin
full_name: Zuo, Ruixin
last_name: Zuo
- first_name: Shidong
full_name: Yang, Shidong
last_name: Yang
- first_name: Alexander
full_name: Trautmann, Alexander
last_name: Trautmann
- first_name: Xiaohong
full_name: Song, Xiaohong
last_name: Song
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Weifeng
full_name: Yang, Weifeng
last_name: Yang
citation:
ama: 'Zhang H, Zuo R, Yang S, et al. Analyzing High-Order Harmonic Generation in
Solids Based on Semi-Classical Recollision Models. In: High-Order Harmonic
Generation in Solids. WORLD SCIENTIFIC; 2024. doi:10.1142/9789811279560_0006'
apa: Zhang, H., Zuo, R., Yang, S., Trautmann, A., Song, X., Meier, T., & Yang,
W. (2024). Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical
Recollision Models. In High-Order Harmonic Generation in Solids. WORLD
SCIENTIFIC. https://doi.org/10.1142/9789811279560_0006
bibtex: '@inbook{Zhang_Zuo_Yang_Trautmann_Song_Meier_Yang_2024, title={Analyzing
High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models},
DOI={10.1142/9789811279560_0006},
booktitle={High-Order Harmonic Generation in Solids}, publisher={WORLD SCIENTIFIC},
author={Zhang, Hongdan and Zuo, Ruixin and Yang, Shidong and Trautmann, Alexander
and Song, Xiaohong and Meier, Torsten and Yang, Weifeng}, year={2024} }'
chicago: Zhang, Hongdan, Ruixin Zuo, Shidong Yang, Alexander Trautmann, Xiaohong
Song, Torsten Meier, and Weifeng Yang. “Analyzing High-Order Harmonic Generation
in Solids Based on Semi-Classical Recollision Models.” In High-Order Harmonic
Generation in Solids. WORLD SCIENTIFIC, 2024. https://doi.org/10.1142/9789811279560_0006.
ieee: H. Zhang et al., “Analyzing High-Order Harmonic Generation in Solids
Based on Semi-Classical Recollision Models,” in High-Order Harmonic Generation
in Solids, WORLD SCIENTIFIC, 2024.
mla: Zhang, Hongdan, et al. “Analyzing High-Order Harmonic Generation in Solids
Based on Semi-Classical Recollision Models.” High-Order Harmonic Generation
in Solids, WORLD SCIENTIFIC, 2024, doi:10.1142/9789811279560_0006.
short: 'H. Zhang, R. Zuo, S. Yang, A. Trautmann, X. Song, T. Meier, W. Yang, in:
High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024.'
date_created: 2025-12-05T09:42:23Z
date_updated: 2025-12-05T09:43:37Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
- _id: '429'
- _id: '27'
doi: 10.1142/9789811279560_0006
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: High-Order Harmonic Generation in Solids
publication_identifier:
isbn:
- '9789811279553'
- '9789811279560'
publication_status: published
publisher: WORLD SCIENTIFIC
status: public
title: Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical
Recollision Models
type: book_chapter
user_id: '16199'
year: '2024'
...
---
_id: '62917'
author:
- first_name: Matthias
full_name: Reichelt, Matthias
id: '138'
last_name: Reichelt
- first_name: Ruixin
full_name: Zuo, Ruixin
last_name: Zuo
- first_name: Xiaohong
full_name: Song, Xiaohong
last_name: Song
- first_name: Weifeng
full_name: Yang, Weifeng
last_name: Yang
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: 'Reichelt M, Zuo R, Song X, Yang W, Meier T. High-Order Harmonic Generation
in Semiconductors with Excitonic Effects. In: High-Order Harmonic Generation
in Solids. WORLD SCIENTIFIC; 2024. doi:10.1142/9789811279560_0009'
apa: Reichelt, M., Zuo, R., Song, X., Yang, W., & Meier, T. (2024). High-Order
Harmonic Generation in Semiconductors with Excitonic Effects. In High-Order
Harmonic Generation in Solids. WORLD SCIENTIFIC. https://doi.org/10.1142/9789811279560_0009
bibtex: '@inbook{Reichelt_Zuo_Song_Yang_Meier_2024, title={High-Order Harmonic Generation
in Semiconductors with Excitonic Effects}, DOI={10.1142/9789811279560_0009},
booktitle={High-Order Harmonic Generation in Solids}, publisher={WORLD SCIENTIFIC},
author={Reichelt, Matthias and Zuo, Ruixin and Song, Xiaohong and Yang, Weifeng
and Meier, Torsten}, year={2024} }'
chicago: Reichelt, Matthias, Ruixin Zuo, Xiaohong Song, Weifeng Yang, and Torsten
Meier. “High-Order Harmonic Generation in Semiconductors with Excitonic Effects.”
In High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC, 2024. https://doi.org/10.1142/9789811279560_0009.
ieee: M. Reichelt, R. Zuo, X. Song, W. Yang, and T. Meier, “High-Order Harmonic
Generation in Semiconductors with Excitonic Effects,” in High-Order Harmonic
Generation in Solids, WORLD SCIENTIFIC, 2024.
mla: Reichelt, Matthias, et al. “High-Order Harmonic Generation in Semiconductors
with Excitonic Effects.” High-Order Harmonic Generation in Solids, WORLD
SCIENTIFIC, 2024, doi:10.1142/9789811279560_0009.
short: 'M. Reichelt, R. Zuo, X. Song, W. Yang, T. Meier, in: High-Order Harmonic
Generation in Solids, WORLD SCIENTIFIC, 2024.'
date_created: 2025-12-05T09:44:20Z
date_updated: 2025-12-05T09:45:31Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.1142/9789811279560_0009
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: High-Order Harmonic Generation in Solids
publication_identifier:
isbn:
- '9789811279553'
- '9789811279560'
publication_status: published
publisher: WORLD SCIENTIFIC
status: public
title: High-Order Harmonic Generation in Semiconductors with Excitonic Effects
type: book_chapter
user_id: '16199'
year: '2024'
...
---
_id: '60581'
abstract:
- lang: eng
text: "Abstract\r\n The natural band
alignments between indium phosphide and the main dioxides of titanium, i.e. rutile,
anatase, and brookite as well as amorphous titania are calculated from the branch-point
energies of the respective materials. Irrespective of the titania polymorph considered,
type-I band alignment is predicted. This may change, however, in dependence on
the microscopic interface structure: supercell calculations for amorphous titania
grown on P-rich InP(001) surfaces result in a titania conduction band that nearly
aligns with that of InP. Depending on the interface specifics, both type-I band
and type-II band alignments are observed in the simulations. This agrees with
recent experimental findings."
article_number: '075001'
author:
- first_name: Isaac Azahel
full_name: Ruiz Alvarado, Isaac Azahel
id: '79462'
last_name: Ruiz Alvarado
orcid: 0000-0002-4710-1170
- first_name: Christian
full_name: Dreßler, Christian
last_name: Dreßler
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
citation:
ama: 'Ruiz Alvarado IA, Dreßler C, Schmidt WG. Band alignment at InP/TiO2
interfaces from density-functional theory. Journal of Physics: Condensed Matter.
2024;37(7). doi:10.1088/1361-648x/ad9725'
apa: 'Ruiz Alvarado, I. A., Dreßler, C., & Schmidt, W. G. (2024). Band alignment
at InP/TiO2 interfaces from density-functional theory. Journal of
Physics: Condensed Matter, 37(7), Article 075001. https://doi.org/10.1088/1361-648x/ad9725'
bibtex: '@article{Ruiz Alvarado_Dreßler_Schmidt_2024, title={Band alignment at InP/TiO2
interfaces from density-functional theory}, volume={37}, DOI={10.1088/1361-648x/ad9725},
number={7075001}, journal={Journal of Physics: Condensed Matter}, publisher={IOP
Publishing}, author={Ruiz Alvarado, Isaac Azahel and Dreßler, Christian and Schmidt,
Wolf Gero}, year={2024} }'
chicago: 'Ruiz Alvarado, Isaac Azahel, Christian Dreßler, and Wolf Gero Schmidt.
“Band Alignment at InP/TiO2 Interfaces from Density-Functional Theory.”
Journal of Physics: Condensed Matter 37, no. 7 (2024). https://doi.org/10.1088/1361-648x/ad9725.'
ieee: 'I. A. Ruiz Alvarado, C. Dreßler, and W. G. Schmidt, “Band alignment at InP/TiO2
interfaces from density-functional theory,” Journal of Physics: Condensed Matter,
vol. 37, no. 7, Art. no. 075001, 2024, doi: 10.1088/1361-648x/ad9725.'
mla: 'Ruiz Alvarado, Isaac Azahel, et al. “Band Alignment at InP/TiO2
Interfaces from Density-Functional Theory.” Journal of Physics: Condensed Matter,
vol. 37, no. 7, 075001, IOP Publishing, 2024, doi:10.1088/1361-648x/ad9725.'
short: 'I.A. Ruiz Alvarado, C. Dreßler, W.G. Schmidt, Journal of Physics: Condensed
Matter 37 (2024).'
date_created: 2025-07-09T13:40:51Z
date_updated: 2025-12-05T13:35:44Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '230'
- _id: '27'
- _id: '35'
doi: 10.1088/1361-648x/ad9725
intvolume: ' 37'
issue: '7'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '168'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
publication: 'Journal of Physics: Condensed Matter'
publication_identifier:
issn:
- 0953-8984
- 1361-648X
publication_status: published
publisher: IOP Publishing
status: public
title: Band alignment at InP/TiO2 interfaces from density-functional theory
type: journal_article
user_id: '16199'
volume: 37
year: '2024'
...
---
_id: '54868'
abstract:
- lang: eng
text: AbstractMost properties of solid materials
are defined by their internal electric field and charge density distributions
which so far are difficult to measure with high spatial resolution. Especially
for 2D materials, the atomic electric fields influence the optoelectronic properties.
In this study, the atomic‐scale electric field and charge density distribution
of WSe2 bi‐ and trilayers are revealed using an emerging
microscopy technique, differential phase contrast (DPC) imaging in scanning transmission
electron microscopy (STEM). For pristine material, a higher positive charge density
located at the selenium atomic columns compared to the tungsten atomic columns
is obtained and tentatively explained by a coherent scattering effect. Furthermore,
the change in the electric field distribution induced by a missing selenium atomic
column is investigated. A characteristic electric field distribution in the vicinity
of the defect with locally reduced magnitudes compared to the pristine lattice
is observed. This effect is accompanied by a considerable inward relaxation of
the surrounding lattice, which according to first principles DFT calculation is
fully compatible with a missing column of Se atoms. This shows that DPC imaging,
as an electric field sensitive technique, provides additional and remarkable information
to the otherwise only structural analysis obtained with conventional STEM imaging.
article_type: original
author:
- first_name: Maja
full_name: Groll, Maja
last_name: Groll
- first_name: Julius
full_name: Bürger, Julius
id: '46952'
last_name: Bürger
- first_name: Ioannis
full_name: Caltzidis, Ioannis
id: '87911'
last_name: Caltzidis
- first_name: Klaus D.
full_name: Jöns, Klaus D.
id: '85353'
last_name: Jöns
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Jörg K. N.
full_name: Lindner, Jörg K. N.
id: '20797'
last_name: Lindner
citation:
ama: Groll M, Bürger J, Caltzidis I, et al. DFT‐Assisted Investigation of the Electric
Field and Charge Density Distribution of Pristine and Defective 2D WSe2
by Differential Phase Contrast Imaging. Small. Published online 2024. doi:10.1002/smll.202311635
apa: Groll, M., Bürger, J., Caltzidis, I., Jöns, K. D., Schmidt, W. G., Gerstmann,
U., & Lindner, J. K. N. (2024). DFT‐Assisted Investigation of the Electric
Field and Charge Density Distribution of Pristine and Defective 2D WSe2
by Differential Phase Contrast Imaging. Small. https://doi.org/10.1002/smll.202311635
bibtex: '@article{Groll_Bürger_Caltzidis_Jöns_Schmidt_Gerstmann_Lindner_2024, title={DFT‐Assisted
Investigation of the Electric Field and Charge Density Distribution of Pristine
and Defective 2D WSe2 by Differential Phase Contrast Imaging}, DOI={10.1002/smll.202311635}, journal={Small},
publisher={Wiley}, author={Groll, Maja and Bürger, Julius and Caltzidis, Ioannis
and Jöns, Klaus D. and Schmidt, Wolf Gero and Gerstmann, Uwe and Lindner, Jörg
K. N.}, year={2024} }'
chicago: Groll, Maja, Julius Bürger, Ioannis Caltzidis, Klaus D. Jöns, Wolf Gero
Schmidt, Uwe Gerstmann, and Jörg K. N. Lindner. “DFT‐Assisted Investigation of
the Electric Field and Charge Density Distribution of Pristine and Defective 2D
WSe2 by Differential Phase Contrast Imaging.” Small, 2024. https://doi.org/10.1002/smll.202311635.
ieee: 'M. Groll et al., “DFT‐Assisted Investigation of the Electric Field
and Charge Density Distribution of Pristine and Defective 2D WSe2 by
Differential Phase Contrast Imaging,” Small, 2024, doi: 10.1002/smll.202311635.'
mla: Groll, Maja, et al. “DFT‐Assisted Investigation of the Electric Field and Charge
Density Distribution of Pristine and Defective 2D WSe2 by Differential
Phase Contrast Imaging.” Small, Wiley, 2024, doi:10.1002/smll.202311635.
short: M. Groll, J. Bürger, I. Caltzidis, K.D. Jöns, W.G. Schmidt, U. Gerstmann,
J.K.N. Lindner, Small (2024).
date_created: 2024-06-24T09:46:25Z
date_updated: 2025-12-05T13:39:01Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '642'
- _id: '286'
- _id: '429'
- _id: '230'
- _id: '27'
- _id: '35'
- _id: '169'
doi: 10.1002/smll.202311635
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '166'
name: 'TRR 142 - A11: TRR 142 - Subproject A11'
- _id: '168'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Small
publication_identifier:
issn:
- 1613-6810
- 1613-6829
publication_status: published
publisher: Wiley
status: public
title: DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution
of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging
type: journal_article
user_id: '16199'
year: '2024'
...
---
_id: '54856'
abstract:
- lang: eng
text: "Abstract\r\n Theoretical spectroscopy
based on double perturbation theory is typically challenged by systems with large
orbital hyperfine splitting. Therefore, we here derive a rigorous, non-perturbative
scheme starting from Dirac’s equation which allows to calculate the contribution
of the orbital HFI for complex structures including heavy atoms with strong spin-orbit
coupling (SOC). Using the PAW formalism, the method has been implemented in the
software package Quantum ESPRESSO. We show that the ‘orbital part’ actually scales
with SOC strength if orbital quenching is hindered by low local symmetry, i.e.
in case of dimers or atoms at surfaces. This holds true in particular when the
unpaired electron is localized in quasi-atomic p-like
orbitals. Here, the orbital part is by far not negligible, but becomes dominant
by surpassing the dipolar contribution by a factor of five."
article_number: '012094'
author:
- first_name: Katharina
full_name: Franzke, Katharina
last_name: Franzke
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
citation:
ama: 'Franzke K, Schmidt WG, Gerstmann U. Relativistic calculation of the orbital
hyperfine splitting in complex microscopic structures. Journal of Physics:
Conference Series. 2024;2701(1). doi:10.1088/1742-6596/2701/1/012094'
apa: 'Franzke, K., Schmidt, W. G., & Gerstmann, U. (2024). Relativistic calculation
of the orbital hyperfine splitting in complex microscopic structures. Journal
of Physics: Conference Series, 2701(1), Article 012094. https://doi.org/10.1088/1742-6596/2701/1/012094'
bibtex: '@article{Franzke_Schmidt_Gerstmann_2024, title={Relativistic calculation
of the orbital hyperfine splitting in complex microscopic structures}, volume={2701},
DOI={10.1088/1742-6596/2701/1/012094},
number={1012094}, journal={Journal of Physics: Conference Series}, publisher={IOP
Publishing}, author={Franzke, Katharina and Schmidt, Wolf Gero and Gerstmann,
Uwe}, year={2024} }'
chicago: 'Franzke, Katharina, Wolf Gero Schmidt, and Uwe Gerstmann. “Relativistic
Calculation of the Orbital Hyperfine Splitting in Complex Microscopic Structures.”
Journal of Physics: Conference Series 2701, no. 1 (2024). https://doi.org/10.1088/1742-6596/2701/1/012094.'
ieee: 'K. Franzke, W. G. Schmidt, and U. Gerstmann, “Relativistic calculation of
the orbital hyperfine splitting in complex microscopic structures,” Journal
of Physics: Conference Series, vol. 2701, no. 1, Art. no. 012094, 2024, doi:
10.1088/1742-6596/2701/1/012094.'
mla: 'Franzke, Katharina, et al. “Relativistic Calculation of the Orbital Hyperfine
Splitting in Complex Microscopic Structures.” Journal of Physics: Conference
Series, vol. 2701, no. 1, 012094, IOP Publishing, 2024, doi:10.1088/1742-6596/2701/1/012094.'
short: 'K. Franzke, W.G. Schmidt, U. Gerstmann, Journal of Physics: Conference Series
2701 (2024).'
date_created: 2024-06-24T06:26:02Z
date_updated: 2025-12-05T13:36:01Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '230'
- _id: '429'
- _id: '27'
- _id: '35'
doi: 10.1088/1742-6596/2701/1/012094
intvolume: ' 2701'
issue: '1'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '166'
name: 'TRR 142 - A11: TRR 142 - Subproject A11'
- _id: '168'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 'Journal of Physics: Conference Series'
publication_identifier:
issn:
- 1742-6588
- 1742-6596
publication_status: published
publisher: IOP Publishing
status: public
title: Relativistic calculation of the orbital hyperfine splitting in complex microscopic
structures
type: journal_article
user_id: '16199'
volume: 2701
year: '2024'
...
---
_id: '54865'
article_number: '076201'
author:
- first_name: Marvin
full_name: Krenz, Marvin
id: '52309'
last_name: Krenz
- first_name: Uwe
full_name: Gerstmann, Uwe
id: '171'
last_name: Gerstmann
orcid: 0000-0002-4476-223X
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
citation:
ama: Krenz M, Gerstmann U, Schmidt WG. Defect-Assisted Exciton Transfer across the
Tetracene-Si(111):H Interface. Physical Review Letters. 2024;132(7). doi:10.1103/physrevlett.132.076201
apa: Krenz, M., Gerstmann, U., & Schmidt, W. G. (2024). Defect-Assisted Exciton
Transfer across the Tetracene-Si(111):H Interface. Physical Review Letters,
132(7), Article 076201. https://doi.org/10.1103/physrevlett.132.076201
bibtex: '@article{Krenz_Gerstmann_Schmidt_2024, title={Defect-Assisted Exciton Transfer
across the Tetracene-Si(111):H Interface}, volume={132}, DOI={10.1103/physrevlett.132.076201},
number={7076201}, journal={Physical Review Letters}, publisher={American Physical
Society (APS)}, author={Krenz, Marvin and Gerstmann, Uwe and Schmidt, Wolf Gero},
year={2024} }'
chicago: Krenz, Marvin, Uwe Gerstmann, and Wolf Gero Schmidt. “Defect-Assisted Exciton
Transfer across the Tetracene-Si(111):H Interface.” Physical Review Letters
132, no. 7 (2024). https://doi.org/10.1103/physrevlett.132.076201.
ieee: 'M. Krenz, U. Gerstmann, and W. G. Schmidt, “Defect-Assisted Exciton Transfer
across the Tetracene-Si(111):H Interface,” Physical Review Letters, vol.
132, no. 7, Art. no. 076201, 2024, doi: 10.1103/physrevlett.132.076201.'
mla: Krenz, Marvin, et al. “Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H
Interface.” Physical Review Letters, vol. 132, no. 7, 076201, American
Physical Society (APS), 2024, doi:10.1103/physrevlett.132.076201.
short: M. Krenz, U. Gerstmann, W.G. Schmidt, Physical Review Letters 132 (2024).
date_created: 2024-06-24T09:39:42Z
date_updated: 2025-12-05T13:38:22Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '429'
- _id: '27'
- _id: '230'
- _id: '35'
doi: 10.1103/physrevlett.132.076201
intvolume: ' 132'
issue: '7'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '168'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '166'
name: 'TRR 142 - A11: TRR 142 - Subproject A11'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physical Review Letters
publication_identifier:
issn:
- 0031-9007
- 1079-7114
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface
type: journal_article
user_id: '16199'
volume: 132
year: '2024'
...