---
_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: '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'
...
---
_id: '62868'
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: 2025-12-04T12:35:53Z
date_updated: 2025-12-05T13:55:00Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '27'
- _id: '429'
- _id: '230'
- _id: '623'
doi: 10.1063/5.0214197
intvolume: ' 1'
issue: '3'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '173'
name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '56'
name: TRR 142 - Project Area C
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: '62853'
abstract:
- lang: eng
text: "Abstract\r\n Developing
coherent excitation methods for quantum emitters ensuring high brightness, optimal
single‐photon purity and indistinguishability of the emitted photons has been
a key challenge in the past years. While various methods have been proposed and
explored, they all have specific advantages and disadvantages. This study investigates
the dynamics of the recent swing‐up scheme as an excitation method for a two‐level
system and its performance in single‐photon generation. By applying two far red‐detuned
laser pulses, the two‐level system can be prepared in the excited state with near‐unity
fidelity. The successful operation and coherent character of this technique are
demonstrated using a semiconductor quantum dot (QD). Moreover, the multi‐dimensional
parameter space of the two laser pulses is explored to analyze its impact on excitation
fidelity. Finally, the performance of the scheme as an excitation method for generating
high‐quality single photons is analyzed. The swing‐up scheme itself proves effective,
exhibiting nearly perfect single‐photon purity, while the observed indistinguishability
in the studied sample is limited by the influence of the inevitable high excitation
powers on the semiconductor environment of the quantum dot."
article_number: '2300359'
author:
- first_name: Katarina
full_name: Boos, Katarina
last_name: Boos
- first_name: Friedrich
full_name: Sbresny, Friedrich
last_name: Sbresny
- first_name: Sang Kyu
full_name: Kim, Sang Kyu
last_name: Kim
- first_name: Malte
full_name: Kremser, Malte
last_name: Kremser
- first_name: Hubert
full_name: Riedl, Hubert
last_name: Riedl
- first_name: Frederik W.
full_name: Bopp, Frederik W.
last_name: Bopp
- first_name: William
full_name: Rauhaus, William
last_name: Rauhaus
- first_name: Bianca
full_name: Scaparra, Bianca
last_name: Scaparra
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Jonathan J.
full_name: Finley, Jonathan J.
last_name: Finley
- first_name: Kai
full_name: Müller, Kai
last_name: Müller
- first_name: Lukas
full_name: Hanschke, Lukas
last_name: Hanschke
citation:
ama: Boos K, Sbresny F, Kim SK, et al. Coherent Swing‐Up Excitation for Semiconductor
Quantum Dots. Advanced Quantum Technologies. 2024;7(4). doi:10.1002/qute.202300359
apa: Boos, K., Sbresny, F., Kim, S. K., Kremser, M., Riedl, H., Bopp, F. W., Rauhaus,
W., Scaparra, B., Jöns, K., Finley, J. J., Müller, K., & Hanschke, L. (2024).
Coherent Swing‐Up Excitation for Semiconductor Quantum Dots. Advanced Quantum
Technologies, 7(4), Article 2300359. https://doi.org/10.1002/qute.202300359
bibtex: '@article{Boos_Sbresny_Kim_Kremser_Riedl_Bopp_Rauhaus_Scaparra_Jöns_Finley_et
al._2024, title={Coherent Swing‐Up Excitation for Semiconductor Quantum Dots},
volume={7}, DOI={10.1002/qute.202300359},
number={42300359}, journal={Advanced Quantum Technologies}, publisher={Wiley},
author={Boos, Katarina and Sbresny, Friedrich and Kim, Sang Kyu and Kremser, Malte
and Riedl, Hubert and Bopp, Frederik W. and Rauhaus, William and Scaparra, Bianca
and Jöns, Klaus and Finley, Jonathan J. and et al.}, year={2024} }'
chicago: Boos, Katarina, Friedrich Sbresny, Sang Kyu Kim, Malte Kremser, Hubert
Riedl, Frederik W. Bopp, William Rauhaus, et al. “Coherent Swing‐Up Excitation
for Semiconductor Quantum Dots.” Advanced Quantum Technologies 7, no. 4
(2024). https://doi.org/10.1002/qute.202300359.
ieee: 'K. Boos et al., “Coherent Swing‐Up Excitation for Semiconductor Quantum
Dots,” Advanced Quantum Technologies, vol. 7, no. 4, Art. no. 2300359,
2024, doi: 10.1002/qute.202300359.'
mla: Boos, Katarina, et al. “Coherent Swing‐Up Excitation for Semiconductor Quantum
Dots.” Advanced Quantum Technologies, vol. 7, no. 4, 2300359, Wiley, 2024,
doi:10.1002/qute.202300359.
short: K. Boos, F. Sbresny, S.K. Kim, M. Kremser, H. Riedl, F.W. Bopp, W. Rauhaus,
B. Scaparra, K. Jöns, J.J. Finley, K. Müller, L. Hanschke, Advanced Quantum Technologies
7 (2024).
date_created: 2025-12-04T12:08:46Z
date_updated: 2025-12-11T13:00:06Z
department:
- _id: '623'
- _id: '15'
- _id: '429'
- _id: '642'
doi: 10.1002/qute.202300359
intvolume: ' 7'
issue: '4'
language:
- iso: eng
publication: Advanced Quantum Technologies
publication_identifier:
issn:
- 2511-9044
- 2511-9044
publication_status: published
publisher: Wiley
status: public
title: Coherent Swing‐Up Excitation for Semiconductor Quantum Dots
type: journal_article
user_id: '48188'
volume: 7
year: '2024'
...
---
_id: '62858'
abstract:
- lang: eng
text: Phonons in solid-state quantum emitters play a crucial role in their performance
as photon sources in quantum technology. For resonant driving, phonons dampen
the Rabi oscillations resulting in reduced preparation fidelities. The phonon
spectral density, which quantifies the strength of the carrier-phonon interaction,
is non-monotonous as a function of energy. As one of the most prominent consequences,
this leads to the reappearance of Rabi rotations for increasing pulse power, which
was theoretically predicted in Phys. Rev. Lett. 98, 227403 (2007). In this paper
we present the experimental demonstration of the reappearance of Rabi rotations.
author:
- first_name: L.
full_name: Hanschke, L.
last_name: Hanschke
- first_name: T. K.
full_name: Bracht, T. K.
last_name: Bracht
- first_name: E.
full_name: Schöll, E.
last_name: Schöll
- first_name: David
full_name: Bauch, David
id: '44172'
last_name: Bauch
- first_name: Eva
full_name: Berger, Eva
last_name: Berger
- first_name: Patricia
full_name: Kallert, Patricia
last_name: Kallert
- first_name: M.
full_name: Peter, M.
last_name: Peter
- first_name: A. J.
full_name: Garcia, A. J.
last_name: Garcia
- first_name: S. F. Covre da
full_name: Silva, S. F. Covre da
last_name: Silva
- first_name: S.
full_name: Manna, S.
last_name: Manna
- first_name: A.
full_name: Rastelli, A.
last_name: Rastelli
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: D. E.
full_name: Reiter, D. E.
last_name: Reiter
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
citation:
ama: Hanschke L, Bracht TK, Schöll E, et al. Experimental measurement of the reappearance
of Rabi rotations in semiconductor quantum dots. arXiv:240919167. Published
online 2024.
apa: Hanschke, L., Bracht, T. K., Schöll, E., Bauch, D., Berger, E., Kallert, P.,
Peter, M., Garcia, A. J., Silva, S. F. C. da, Manna, S., Rastelli, A., Schumacher,
S., Reiter, D. E., & Jöns, K. (2024). Experimental measurement of the reappearance
of Rabi rotations in semiconductor quantum dots. In arXiv:2409.19167.
bibtex: '@article{Hanschke_Bracht_Schöll_Bauch_Berger_Kallert_Peter_Garcia_Silva_Manna_et
al._2024, title={Experimental measurement of the reappearance of Rabi rotations
in semiconductor quantum dots}, journal={arXiv:2409.19167}, author={Hanschke,
L. and Bracht, T. K. and Schöll, E. and Bauch, David and Berger, Eva and Kallert,
Patricia and Peter, M. and Garcia, A. J. and Silva, S. F. Covre da and Manna,
S. and et al.}, year={2024} }'
chicago: Hanschke, L., T. K. Bracht, E. Schöll, David Bauch, Eva Berger, Patricia
Kallert, M. Peter, et al. “Experimental Measurement of the Reappearance of Rabi
Rotations in Semiconductor Quantum Dots.” ArXiv:2409.19167, 2024.
ieee: L. Hanschke et al., “Experimental measurement of the reappearance of
Rabi rotations in semiconductor quantum dots,” arXiv:2409.19167. 2024.
mla: Hanschke, L., et al. “Experimental Measurement of the Reappearance of Rabi
Rotations in Semiconductor Quantum Dots.” ArXiv:2409.19167, 2024.
short: L. Hanschke, T.K. Bracht, E. Schöll, D. Bauch, E. Berger, P. Kallert, M.
Peter, A.J. Garcia, S.F.C. da Silva, S. Manna, A. Rastelli, S. Schumacher, D.E.
Reiter, K. Jöns, ArXiv:2409.19167 (2024).
date_created: 2025-12-04T12:16:58Z
date_updated: 2025-12-11T12:54:41Z
department:
- _id: '623'
- _id: '15'
- _id: '429'
- _id: '642'
external_id:
arxiv:
- '2409.19167'
language:
- iso: eng
publication: arXiv:2409.19167
status: public
title: Experimental measurement of the reappearance of Rabi rotations in semiconductor
quantum dots
type: preprint
user_id: '48188'
year: '2024'
...
---
_id: '62856'
abstract:
- lang: eng
text: On-chip emitters that can generate single and entangled photons are essential
building blocks for developing photonic quantum information processing technologies
in a scalable fashion. Semiconductor quantum dots (QDs) are attractive candidates
that emit high-quality quantum states of light on demand, however at a rate limited
by their spontaneous radiative lifetime. In this study, we utilize the Purcell
effect to demonstrate up to a 38-fold enhancement in the emission rate of InAs
QDs by coupling them to metal-clad GaAs nanopillars. These cavities, featuring
a sub-wavelength mode volume of 4.5x10-4 (λ/n)3 and low quality factor of 62,
enable Purcell-enhanced single-photon emission across a large bandwidth of 15
nm. The broadband nature of the cavity eliminates the need for implementing tuning
mechanisms typically required to achieve QD-cavity resonance, thus relaxing fabrication
constraints. Ultimately, this QD-cavity architecture represents a significant
stride towards developing solid-state quantum emitters generating near-ideal single-photon
states at GHz-level repetition rates.
author:
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
citation:
ama: Jöns K. Purcell-enhanced single-photon emission from InAs/GaAs quantum dots
coupled to broadband cylindrical nanocavities. Published online 2024.
apa: Jöns, K. (2024). Purcell-enhanced single-photon emission from InAs/GaAs
quantum dots coupled to broadband cylindrical nanocavities.
bibtex: '@article{Jöns_2024, title={Purcell-enhanced single-photon emission from
InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities}, author={Jöns,
Klaus}, year={2024} }'
chicago: Jöns, Klaus. “Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum
Dots Coupled to Broadband Cylindrical Nanocavities,” 2024.
ieee: K. Jöns, “Purcell-enhanced single-photon emission from InAs/GaAs quantum dots
coupled to broadband cylindrical nanocavities.” 2024.
mla: Jöns, Klaus. Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum
Dots Coupled to Broadband Cylindrical Nanocavities. 2024.
short: K. Jöns, (2024).
date_created: 2025-12-04T12:13:39Z
date_updated: 2025-12-11T12:58:57Z
department:
- _id: '623'
- _id: '15'
- _id: '429'
- _id: '642'
language:
- iso: eng
status: public
title: Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled
to broadband cylindrical nanocavities
type: preprint
user_id: '48188'
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: '57743'
article_number: '023717'
author:
- first_name: Suchitra
full_name: Krishnaswamy, Suchitra
id: '78347'
last_name: Krishnaswamy
- first_name: Fabian
full_name: Schlue, Fabian
id: '63579'
last_name: Schlue
- first_name: L.
full_name: Ares, L.
last_name: Ares
- first_name: V.
full_name: Dyachuk, V.
last_name: Dyachuk
- first_name: Michael
full_name: Stefszky, Michael
id: '42777'
last_name: Stefszky
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: Krishnaswamy S, Schlue F, Ares L, et al. Experimental retrieval of photon statistics
from click detection. Physical Review A. 2024;110(2). doi:10.1103/physreva.110.023717
apa: Krishnaswamy, S., Schlue, F., Ares, L., Dyachuk, V., Stefszky, M., Brecht,
B., Silberhorn, C., & Sperling, J. (2024). Experimental retrieval of photon
statistics from click detection. Physical Review A, 110(2), Article
023717. https://doi.org/10.1103/physreva.110.023717
bibtex: '@article{Krishnaswamy_Schlue_Ares_Dyachuk_Stefszky_Brecht_Silberhorn_Sperling_2024,
title={Experimental retrieval of photon statistics from click detection}, volume={110},
DOI={10.1103/physreva.110.023717},
number={2023717}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Krishnaswamy, Suchitra and Schlue, Fabian and Ares, L. and Dyachuk,
V. and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Sperling,
Jan}, year={2024} }'
chicago: Krishnaswamy, Suchitra, Fabian Schlue, L. Ares, V. Dyachuk, Michael Stefszky,
Benjamin Brecht, Christine Silberhorn, and Jan Sperling. “Experimental Retrieval
of Photon Statistics from Click Detection.” Physical Review A 110, no.
2 (2024). https://doi.org/10.1103/physreva.110.023717.
ieee: 'S. Krishnaswamy et al., “Experimental retrieval of photon statistics
from click detection,” Physical Review A, vol. 110, no. 2, Art. no. 023717,
2024, doi: 10.1103/physreva.110.023717.'
mla: Krishnaswamy, Suchitra, et al. “Experimental Retrieval of Photon Statistics
from Click Detection.” Physical Review A, vol. 110, no. 2, 023717, American
Physical Society (APS), 2024, doi:10.1103/physreva.110.023717.
short: S. Krishnaswamy, F. Schlue, L. Ares, V. Dyachuk, M. Stefszky, B. Brecht,
C. Silberhorn, J. Sperling, Physical Review A 110 (2024).
date_created: 2024-12-11T15:33:08Z
date_updated: 2024-12-11T15:35:07Z
department:
- _id: '623'
- _id: '15'
- _id: '170'
- _id: '706'
- _id: '429'
- _id: '623'
doi: 10.1103/physreva.110.023717
intvolume: ' 110'
issue: '2'
language:
- iso: eng
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Experimental retrieval of photon statistics from click detection
type: journal_article
user_id: '75127'
volume: 110
year: '2024'
...
---
_id: '58092'
author:
- first_name: 'Alex D. '
full_name: 'Carr, Alex D. '
last_name: Carr
- first_name: 'Claudia '
full_name: 'Ruppert, Claudia '
last_name: Ruppert
- first_name: 'Anton K. '
full_name: 'Samusev, Anton K. '
last_name: Samusev
- first_name: 'Giulia '
full_name: 'Magnabosco, Giulia '
last_name: Magnabosco
- first_name: 'Nicolas '
full_name: 'Vogel, Nicolas '
last_name: Vogel
- first_name: 'Tetiana L. '
full_name: 'Linnik, Tetiana L. '
last_name: Linnik
- first_name: 'Andrew W. '
full_name: 'Rushforth, Andrew W. '
last_name: Rushforth
- first_name: 'Manfred '
full_name: 'Bayer, Manfred '
last_name: Bayer
- first_name: 'Alexey V. '
full_name: 'Scherbakov, Alexey V. '
last_name: Scherbakov
- first_name: 'Andrey V. '
full_name: 'Akimov, Andrey V. '
last_name: Akimov
citation:
ama: Carr AD, Ruppert C, Samusev AK, et al. Enhanced Photon–Phonon Interaction in
WSe2 Acoustic Nanocavities. ACS Photonics. 2024;11(3). doi:10.1021/acsphotonics.3c01601
apa: Carr, A. D., Ruppert, C., Samusev, A. K., Magnabosco, G., Vogel, N., Linnik,
T. L., Rushforth, A. W., Bayer, M., Scherbakov, A. V., & Akimov, A. V. (2024).
Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities. ACS Photonics,
11(3). https://doi.org/10.1021/acsphotonics.3c01601
bibtex: '@article{Carr_Ruppert_Samusev_Magnabosco_Vogel_Linnik_Rushforth_Bayer_Scherbakov_Akimov_2024,
title={Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities}, volume={11},
DOI={10.1021/acsphotonics.3c01601},
number={3}, journal={ACS Photonics}, author={Carr, Alex D. and Ruppert, Claudia and
Samusev, Anton K. and Magnabosco, Giulia and Vogel, Nicolas and Linnik, Tetiana
L. and Rushforth, Andrew W. and Bayer, Manfred and Scherbakov, Alexey V. and
Akimov, Andrey V. }, year={2024} }'
chicago: Carr, Alex D. , Claudia Ruppert, Anton K. Samusev, Giulia Magnabosco,
Nicolas Vogel, Tetiana L. Linnik, Andrew W. Rushforth, Manfred Bayer, Alexey
V. Scherbakov, and Andrey V. Akimov. “Enhanced Photon–Phonon Interaction in
WSe2 Acoustic Nanocavities.” ACS Photonics 11, no. 3 (2024). https://doi.org/10.1021/acsphotonics.3c01601.
ieee: 'A. D. Carr et al., “Enhanced Photon–Phonon Interaction in WSe2 Acoustic
Nanocavities,” ACS Photonics, vol. 11, no. 3, 2024, doi: 10.1021/acsphotonics.3c01601.'
mla: Carr, Alex D., et al. “Enhanced Photon–Phonon Interaction in WSe2 Acoustic
Nanocavities.” ACS Photonics, vol. 11, no. 3, 2024, doi:10.1021/acsphotonics.3c01601.
short: A.D. Carr, C. Ruppert, A.K. Samusev, G. Magnabosco, N. Vogel, T.L. Linnik,
A.W. Rushforth, M. Bayer, A.V. Scherbakov, A.V. Akimov, ACS Photonics 11 (2024).
date_created: 2025-01-07T16:17:04Z
date_updated: 2025-01-07T16:17:22Z
department:
- _id: '429'
doi: 10.1021/acsphotonics.3c01601
extern: '1'
intvolume: ' 11'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://pubs.acs.org/doi/10.1021/acsphotonics.3c01601
oa: '1'
project:
- _id: '63'
grant_number: '231447078'
name: 'TRR 142 - A06: TRR 142 - Ultraschnelle Akustik zur Modulation von Lichtemission
(A06)'
publication: ACS Photonics
publication_status: published
status: public
title: Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities
type: journal_article
user_id: '94792'
volume: 11
year: '2024'
...
---
_id: '49117'
article_number: '043158'
author:
- first_name: D.
full_name: Scharwald, D.
last_name: Scharwald
- first_name: T.
full_name: Meier, T.
last_name: Meier
- first_name: P. R.
full_name: Sharapova, P. R.
last_name: Sharapova
citation:
ama: Scharwald D, Meier T, Sharapova PR. Phase sensitivity of spatially broadband
high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043158
apa: Scharwald, D., Meier, T., & Sharapova, P. R. (2023). Phase sensitivity
of spatially broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers. Physical Review Research, 5(4), Article 043158.
https://doi.org/10.1103/physrevresearch.5.043158
bibtex: '@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially
broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers}, volume={5}, DOI={10.1103/physrevresearch.5.043158},
number={4043158}, journal={Physical Review Research}, publisher={American Physical
Society (APS)}, author={Scharwald, D. and Meier, T. and Sharapova, P. R.}, year={2023}
}'
chicago: Scharwald, D., T. Meier, and P. R. Sharapova. “Phase Sensitivity of Spatially
Broadband High-Gain <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math>
Interferometers.” Physical Review Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043158.
ieee: 'D. Scharwald, T. Meier, and P. R. Sharapova, “Phase sensitivity of spatially
broadband high-gain <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math>
interferometers,” Physical Review Research, vol. 5, no. 4, Art. no. 043158,
2023, doi: 10.1103/physrevresearch.5.043158.'
mla: Scharwald, D., et al. “Phase Sensitivity of Spatially Broadband High-Gain <mml:Math
Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math>
Interferometers.” Physical Review Research, vol. 5, no. 4, 043158, American
Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043158.
short: D. Scharwald, T. Meier, P.R. Sharapova, Physical Review Research 5 (2023).
date_created: 2023-11-22T09:18:02Z
date_updated: 2023-11-22T09:19:02Z
department:
- _id: '15'
- _id: '170'
- _id: '230'
- _id: '569'
- _id: '429'
doi: 10.1103/physrevresearch.5.043158
intvolume: ' 5'
issue: '4'
keyword:
- General Physics and Astronomy
language:
- iso: eng
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Phase sensitivity of spatially broadband high-gain SU(1,1)
interferometers
type: journal_article
user_id: '60286'
volume: 5
year: '2023'
...
---
_id: '48599'
abstract:
- lang: eng
text: AbstractThe biexciton‐exciton emission cascade
commonly used in quantum‐dot systems to generate polarization entanglement yields
photons with intrinsically limited indistinguishability. In the present work,
it focuses on the generation of pairs of photons with high degrees of polarization
entanglement and simultaneously high indistinguishability. It achieves this goal
by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates
that a suitably tailored circular Bragg reflector fulfills the requirements of
sufficient selective Purcell enhancement of biexciton emission paired with spectrally
broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical
study combines (i) the optimization of realistic photonic structures solving Maxwell's
equations from which model parameters are extracted as input for (ii) microscopic
simulations of quantum‐dot cavity excitation dynamics with full access to photon
properties. It reports non‐trivial dependencies on system parameters and use the
predictive power of the combined theoretical approach to determine the optimal
range of Purcell enhancement that maximizes indistinguishability and entanglement
to near unity values, here specifically for the telecom C‐band at 1550 nm.
author:
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Dustin
full_name: Siebert, Dustin
last_name: Siebert
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On‐Demand Indistinguishable
and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies.
Published online 2023. doi:10.1002/qute.202300142
apa: Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023).
On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.
Advanced Quantum Technologies. https://doi.org/10.1002/qute.202300142
bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand
Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, DOI={10.1002/qute.202300142}, journal={Advanced
Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin
and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }'
chicago: Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher.
“On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.”
Advanced Quantum Technologies, 2023. https://doi.org/10.1002/qute.202300142.
ieee: 'D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On‐Demand
Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” Advanced
Quantum Technologies, 2023, doi: 10.1002/qute.202300142.'
mla: Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using
Tailored Cavity Designs.” Advanced Quantum Technologies, Wiley, 2023, doi:10.1002/qute.202300142.
short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, Advanced Quantum
Technologies (2023).
date_created: 2023-11-03T10:07:38Z
date_updated: 2023-12-21T10:41:17Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '623'
doi: 10.1002/qute.202300142
keyword:
- tet_topic_qd
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/10.1002/qute.202300142
oa: '1'
project:
- _id: '173'
grant_number: '231447078'
name: 'TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen (C09*)'
- _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: Advanced Quantum Technologies
publication_identifier:
issn:
- 2511-9044
- 2511-9044
publication_status: published
publisher: Wiley
related_material:
record:
- id: '43246'
relation: earlier_version
status: public
status: public
title: On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs
type: journal_article
user_id: '158'
year: '2023'
...
---
_id: '43246'
abstract:
- lang: eng
text: The biexciton-exciton emission cascade commonly used in quantum-dot systems
to generate polarization entanglement yields photons with intrinsically limited
indistinguishability. In the present work we focus on the generation of pairs
of photons with high degrees of polarization entanglement and simultaneously high
indistinguishibility. We achieve this goal by selectively reducing the biexciton
lifetime with an optical resonator. We demonstrate that a suitably tailored circular
Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement
of biexciton emission paired with spectrally broad photon extraction and two-fold
degenerate optical modes. Our in-depth theoretical study combines (i) the optimization
of realistic photonic structures solving Maxwell's equations from which model
parameters are extracted as input for (ii) microscopic simulations of quantum-dot
cavity excitation dynamics with full access to photon properties. We report non-trivial
dependencies on system parameters and use the predictive power of our combined
theoretical approach to determine the optimal range of Purcell enhancement that
maximizes indistinguishability and entanglement to near unity values in the telecom
C-band at $1550\,\mathrm{nm}$.
author:
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Dustin
full_name: Siebert, Dustin
last_name: Siebert
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On-demand indistinguishable
and entangled photons at telecom frequencies using tailored cavity designs. Published
online 2023.
apa: Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023).
On-demand indistinguishable and entangled photons at telecom frequencies using
tailored cavity designs.
bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On-demand
indistinguishable and entangled photons at telecom frequencies using tailored
cavity designs}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and
Förstner, Jens and Schumacher, Stefan}, year={2023} }'
chicago: Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher.
“On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using
Tailored Cavity Designs,” 2023.
ieee: D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On-demand
indistinguishable and entangled photons at telecom frequencies using tailored
cavity designs.” 2023.
mla: Bauch, David, et al. On-Demand Indistinguishable and Entangled Photons at
Telecom Frequencies Using Tailored Cavity Designs. 2023.
short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, (2023).
date_created: 2023-03-31T13:22:05Z
date_updated: 2023-12-21T10:41:17Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '623'
- _id: '15'
- _id: '35'
- _id: '170'
- _id: '297'
keyword:
- tet_topic_phc
- tet_topic_qd
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2303.13871.pdf
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '173'
grant_number: '231447078'
name: 'TRR 142 - C09: TRR 142 - Subproject C09'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Subproject B06'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
related_material:
record:
- id: '48599'
relation: later_version
status: public
status: public
title: On-demand indistinguishable and entangled photons at telecom frequencies using
tailored cavity designs
type: preprint
user_id: '16199'
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: '54854'
abstract:
- lang: eng
text: 'Batteries based on heavier alkali ions are considered promising candidates
to substitute for current Li-based technologies. In this theoretical study, we
characterize the structural properties of a novel material, i.e., F-doped RbTiOPO4
(RbTiPO4F, RTP:F), and discuss aspects of its electrochemical performance in Rb-ion
batteries (RIBs) using density functional theory (DFT). According to our calculations,
RTP:F is expected to retain the so-called KTiOPO4 (KTP)-type structure, with lattice
parameters of 13.236 Å, 6.616 Å, and 10.945 Å. Due to the doping with F, the crystal
features eight extra electrons per unit cell, whereby each of these electrons
is trapped by one of the surrounding Ti atoms in the cell. Notably, the ground
state of the system corresponds to a ferromagnetic spin configuration (i.e., S=4).
The deintercalation of Rb leads to the oxidation of the Ti atoms in the cell (i.e.,
from Ti3+ to Ti4+) and to reduced magnetic moments. The material promises interesting
electrochemical properties for the cathode: rather high average voltages above
2.8 V and modest volume shrinkages below 13% even in the fully deintercalated
case are predicted.'
article_number: '5'
author:
- first_name: Adriana
full_name: Bocchini, Adriana
id: '58349'
last_name: Bocchini
orcid: 0000-0002-2134-3075
- first_name: Yingjie
full_name: Xie, Yingjie
last_name: Xie
- 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: Bocchini A, Xie Y, Schmidt WG, Gerstmann U. Structural and Electrochemical
Properties of F-Doped RbTiOPO4 (RTP:F) Predicted from First Principles. Crystals.
2023;14(1). doi:10.3390/cryst14010005
apa: Bocchini, A., Xie, Y., Schmidt, W. G., & Gerstmann, U. (2023). Structural
and Electrochemical Properties of F-Doped RbTiOPO4 (RTP:F) Predicted from First
Principles. Crystals, 14(1), Article 5. https://doi.org/10.3390/cryst14010005
bibtex: '@article{Bocchini_Xie_Schmidt_Gerstmann_2023, title={Structural and Electrochemical
Properties of F-Doped RbTiOPO4 (RTP:F) Predicted from First Principles}, volume={14},
DOI={10.3390/cryst14010005},
number={15}, journal={Crystals}, publisher={MDPI AG}, author={Bocchini, Adriana
and Xie, Yingjie and Schmidt, Wolf Gero and Gerstmann, Uwe}, year={2023} }'
chicago: Bocchini, Adriana, Yingjie Xie, Wolf Gero Schmidt, and Uwe Gerstmann. “Structural
and Electrochemical Properties of F-Doped RbTiOPO4 (RTP:F) Predicted from First
Principles.” Crystals 14, no. 1 (2023). https://doi.org/10.3390/cryst14010005.
ieee: 'A. Bocchini, Y. Xie, W. G. Schmidt, and U. Gerstmann, “Structural and Electrochemical
Properties of F-Doped RbTiOPO4 (RTP:F) Predicted from First Principles,” Crystals,
vol. 14, no. 1, Art. no. 5, 2023, doi: 10.3390/cryst14010005.'
mla: Bocchini, Adriana, et al. “Structural and Electrochemical Properties of F-Doped
RbTiOPO4 (RTP:F) Predicted from First Principles.” Crystals, vol. 14, no.
1, 5, MDPI AG, 2023, doi:10.3390/cryst14010005.
short: A. Bocchini, Y. Xie, W.G. Schmidt, U. Gerstmann, Crystals 14 (2023).
date_created: 2024-06-24T06:21:04Z
date_updated: 2024-06-24T06:30:13Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '230'
- _id: '429'
- _id: '27'
doi: 10.3390/cryst14010005
intvolume: ' 14'
issue: '1'
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: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '166'
name: 'TRR 142 - A11: TRR 142 - Subproject A11'
- _id: '168'
grant_number: '231447078'
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: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
status: public
title: Structural and Electrochemical Properties of F-Doped RbTiOPO4 (RTP:F) Predicted
from First Principles
type: journal_article
user_id: '16199'
volume: 14
year: '2023'
...
---
_id: '53298'
abstract:
- lang: eng
text: Dataset of the publication "Theoretical analysis of four-wave mixing on semiconductor
quantum dot ensembles with quantum light" H. Rose, S. Grisard, A. V. Trifonov,
R. Reichhardt, M. Reichelt, M. Bayer, I. A. Akimov, and T. Meier, Proc. SPIE 12419,
Ultrafast Phenomena and Nanophotonics XXVII, 124190H (2023). ( https://doi.org/10.1117/12.2647700
). The zip file includes the data on which the plots shown in figures 1 and 2
are based.
author:
- first_name: Hendrik
full_name: Rose, Hendrik
id: '55958'
last_name: Rose
orcid: 0000-0002-3079-5428
- first_name: Stefan
full_name: Grisard, Stefan
last_name: Grisard
- first_name: Artur V.
full_name: Trifonov, Artur V.
last_name: Trifonov
- first_name: Rilana
full_name: Reichhardt, Rilana
last_name: Reichhardt
- first_name: Matthias
full_name: Reichelt, Matthias
id: '138'
last_name: Reichelt
- first_name: Manfred
full_name: Bayer, Manfred
last_name: Bayer
- first_name: Ilya A.
full_name: Akimov, Ilya A.
last_name: Akimov
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
citation:
ama: Rose H, Grisard S, Trifonov AV, et al. Theoretical Analysis of Four-Wave
Mixing on Semiconductor Quantum Dot Ensembles with Quantum Light. LibreCat
University; 2023. doi:10.5281/ZENODO.7755761
apa: Rose, H., Grisard, S., Trifonov, A. V., Reichhardt, R., Reichelt, M., Bayer,
M., Akimov, I. A., & Meier, T. (2023). Theoretical analysis of four-wave
mixing on semiconductor quantum dot ensembles with quantum light. LibreCat
University. https://doi.org/10.5281/ZENODO.7755761
bibtex: '@book{Rose_Grisard_Trifonov_Reichhardt_Reichelt_Bayer_Akimov_Meier_2023,
title={Theoretical analysis of four-wave mixing on semiconductor quantum dot ensembles
with quantum light}, DOI={10.5281/ZENODO.7755761},
publisher={LibreCat University}, author={Rose, Hendrik and Grisard, Stefan and
Trifonov, Artur V. and Reichhardt, Rilana and Reichelt, Matthias and Bayer, Manfred
and Akimov, Ilya A. and Meier, Torsten}, year={2023} }'
chicago: Rose, Hendrik, Stefan Grisard, Artur V. Trifonov, Rilana Reichhardt, Matthias
Reichelt, Manfred Bayer, Ilya A. Akimov, and Torsten Meier. Theoretical Analysis
of Four-Wave Mixing on Semiconductor Quantum Dot Ensembles with Quantum Light.
LibreCat University, 2023. https://doi.org/10.5281/ZENODO.7755761.
ieee: H. Rose et al., Theoretical analysis of four-wave mixing on semiconductor
quantum dot ensembles with quantum light. LibreCat University, 2023.
mla: Rose, Hendrik, et al. Theoretical Analysis of Four-Wave Mixing on Semiconductor
Quantum Dot Ensembles with Quantum Light. LibreCat University, 2023, doi:10.5281/ZENODO.7755761.
short: H. Rose, S. Grisard, A.V. Trifonov, R. Reichhardt, M. Reichelt, M. Bayer,
I.A. Akimov, T. Meier, Theoretical Analysis of Four-Wave Mixing on Semiconductor
Quantum Dot Ensembles with Quantum Light, LibreCat University, 2023.
date_created: 2024-04-05T09:54:32Z
date_updated: 2024-07-15T09:43:25Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '429'
doi: 10.5281/ZENODO.7755761
project:
- _id: '59'
grant_number: '231447078'
name: 'TRR 142 - A02: TRR 142 - Nichtlineare Spektroskopie von Halbleiter-Nanostrukturen
mit Quantenlicht (A02)'
- _id: '165'
grant_number: '231447078'
name: 'TRR 142 - A10: TRR 142 - Nichtlinearitäten von atomar dünnen Übergangsmetall-Dichalkogeniden
in starken Feldern (A10)'
publisher: LibreCat University
status: public
title: Theoretical analysis of four-wave mixing on semiconductor quantum dot ensembles
with quantum light
type: research_data
user_id: '16199'
year: '2023'
...