---
_id: '63827'
abstract:
- lang: eng
text: Light-emitting diodes (LEDs) are becoming increasingly important across various
sectors of the lighting industry and are being used more frequently. In the field
of symbolic projection, research is increasingly focusing on implementing light
modulation using energy-efficient, incoherent LEDs rather than lasers. Since light
modulation in micro- and nano-optics is typically achieved through phase modulation,
Finite-Difference Time-Domain (FDTD) simulations are employed for analysis. The
objective of this article is to investigate different approaches for approximating
incoherent monochromatic light sources within FDTD simulations. To this end, two
approaches based on dipole sources are considered, as well as a method involving
plane waves with modulated wavefronts based on Cosine–Fourier functions and a
method based on the superposition of Gaussian beams. These methods are evaluated
in terms of their accuracy using a two-dimensional double-slit configuration and
are compared against a fully incoherent analytical reference.
article_number: '128'
article_type: original
author:
- first_name: Dominik
full_name: Metzner, Dominik
last_name: Metzner
- first_name: Jens
full_name: Potthoff, Jens
last_name: Potthoff
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Metzner D, Potthoff J, Zentgraf T, Förstner J. Approximating Incoherent Monochromatic
Light Sources in FDTD Simulations. Photonics. 2026;13(2). doi:10.3390/photonics13020128
apa: Metzner, D., Potthoff, J., Zentgraf, T., & Förstner, J. (2026). Approximating
Incoherent Monochromatic Light Sources in FDTD Simulations. Photonics,
13(2), Article 128. https://doi.org/10.3390/photonics13020128
bibtex: '@article{Metzner_Potthoff_Zentgraf_Förstner_2026, title={Approximating
Incoherent Monochromatic Light Sources in FDTD Simulations}, volume={13}, DOI={10.3390/photonics13020128},
number={2128}, journal={Photonics}, publisher={MDPI AG}, author={Metzner, Dominik
and Potthoff, Jens and Zentgraf, Thomas and Förstner, Jens}, year={2026} }'
chicago: Metzner, Dominik, Jens Potthoff, Thomas Zentgraf, and Jens Förstner. “Approximating
Incoherent Monochromatic Light Sources in FDTD Simulations.” Photonics
13, no. 2 (2026). https://doi.org/10.3390/photonics13020128.
ieee: 'D. Metzner, J. Potthoff, T. Zentgraf, and J. Förstner, “Approximating Incoherent
Monochromatic Light Sources in FDTD Simulations,” Photonics, vol. 13, no.
2, Art. no. 128, 2026, doi: 10.3390/photonics13020128.'
mla: Metzner, Dominik, et al. “Approximating Incoherent Monochromatic Light Sources
in FDTD Simulations.” Photonics, vol. 13, no. 2, 128, MDPI AG, 2026, doi:10.3390/photonics13020128.
short: D. Metzner, J. Potthoff, T. Zentgraf, J. Förstner, Photonics 13 (2026).
date_created: 2026-02-02T07:18:03Z
date_updated: 2026-02-02T21:38:34Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
- _id: '61'
doi: 10.3390/photonics13020128
intvolume: ' 13'
issue: '2'
keyword:
- tet_topic_opticalantenna
- tet_topic_numerics
- tet_topic_meta
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2304-6732/13/2/128
oa: '1'
publication: Photonics
publication_identifier:
issn:
- 2304-6732
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Approximating Incoherent Monochromatic Light Sources in FDTD Simulations
type: journal_article
user_id: '158'
volume: 13
year: '2026'
...
---
_id: '64873'
abstract:
- lang: eng
text: Continuous flow catalysis utilizing gel-bound organocatalysts within a microfluidic
reactor represents a compelling strategy in the realm of organic synthesis. In
this study, a quinuclidine-based catalytic monomer (QMA) was synthesized to create
polymer gel dots through the process of photopolymerization that serve as a support
for the catalyst. The resulting gel-bound organocatalysts were assembled within
a continuous microfluidic reactor to facilitate the Baylis–Hillman reaction between
various aldehydes and acrylonitrile at a temperature of 50 °C. The conversion
of the product was assessed using 1H NMR spectroscopy as an offline analytical
method over a duration of 8 h. The findings indicated that highly reactive aldehydes
achieved conversion rates exceeding 90%, in contrast to their less reactive counterparts.
Furthermore, these results were juxtaposed with previously published data derived
from alternative synthetic methodologies, revealing that the continuous microfluidic
reactions employing integrated organocatalysts within polymer networks exhibited
significantly higher conversions with reduced reaction times (8 h) at the same
temperature (50 °C). Additionally, the influence of different geometries (round,
triangular, and square) of the gel dots on catalytic activity was investigated,
with round and square gel dots demonstrating slightly superior performance compared
with triangular gel dots, attributed to their increased surface area. Moreover,
an extended reaction period of 6 days was conducted using 4-bromobenzaldehyde
and acrylonitrile, resulting in a conversion rate exceeding 70%, which remained
stable for 5 days before experiencing a slight decline due to product accumulation
on the gel dots.
article_number: '14448'
article_type: original
author:
- first_name: Naresh
full_name: Killi, Naresh
last_name: Killi
- first_name: Amit
full_name: Kumar, Amit
last_name: Kumar
- first_name: Leena
full_name: Nebhani, Leena
last_name: Nebhani
- first_name: Franziska
full_name: Obst, Franziska
last_name: Obst
- first_name: Andreas
full_name: Richter, Andreas
last_name: Richter
- first_name: Bernhard
full_name: Reineke Matsudo, Bernhard
last_name: Reineke Matsudo
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Dirk
full_name: Kuckling, Dirk
id: '287'
last_name: Kuckling
citation:
ama: Killi N, Kumar A, Nebhani L, et al. Integrating an Organocatalyst into a Polymeric
Gel Framework for the Continuous Microflow Baylis–Hillman Reaction. ACS Omega.
2026;11(9). doi:10.1021/acsomega.5c09476
apa: Killi, N., Kumar, A., Nebhani, L., Obst, F., Richter, A., Reineke Matsudo,
B., Zentgraf, T., & Kuckling, D. (2026). Integrating an Organocatalyst into
a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction.
ACS Omega, 11(9), Article 14448. https://doi.org/10.1021/acsomega.5c09476
bibtex: '@article{Killi_Kumar_Nebhani_Obst_Richter_Reineke Matsudo_Zentgraf_Kuckling_2026,
title={Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous
Microflow Baylis–Hillman Reaction}, volume={11}, DOI={10.1021/acsomega.5c09476},
number={914448}, journal={ACS Omega}, publisher={American Chemical Society (ACS)},
author={Killi, Naresh and Kumar, Amit and Nebhani, Leena and Obst, Franziska and
Richter, Andreas and Reineke Matsudo, Bernhard and Zentgraf, Thomas and Kuckling,
Dirk}, year={2026} }'
chicago: Killi, Naresh, Amit Kumar, Leena Nebhani, Franziska Obst, Andreas Richter,
Bernhard Reineke Matsudo, Thomas Zentgraf, and Dirk Kuckling. “Integrating an
Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman
Reaction.” ACS Omega 11, no. 9 (2026). https://doi.org/10.1021/acsomega.5c09476.
ieee: 'N. Killi et al., “Integrating an Organocatalyst into a Polymeric Gel
Framework for the Continuous Microflow Baylis–Hillman Reaction,” ACS Omega,
vol. 11, no. 9, Art. no. 14448, 2026, doi: 10.1021/acsomega.5c09476.'
mla: Killi, Naresh, et al. “Integrating an Organocatalyst into a Polymeric Gel Framework
for the Continuous Microflow Baylis–Hillman Reaction.” ACS Omega, vol.
11, no. 9, 14448, American Chemical Society (ACS), 2026, doi:10.1021/acsomega.5c09476.
short: N. Killi, A. Kumar, L. Nebhani, F. Obst, A. Richter, B. Reineke Matsudo,
T. Zentgraf, D. Kuckling, ACS Omega 11 (2026).
date_created: 2026-03-10T08:23:43Z
date_updated: 2026-03-10T08:27:15Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
- _id: '2'
- _id: '311'
doi: 10.1021/acsomega.5c09476
intvolume: ' 11'
issue: '9'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://pubs.acs.org/doi/abs/10.1021/acsomega.5c09476
oa: '1'
publication: ACS Omega
publication_identifier:
issn:
- 2470-1343
- 2470-1343
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous
Microflow Baylis–Hillman Reaction
type: journal_article
user_id: '30525'
volume: 11
year: '2026'
...
---
_id: '61523'
abstract:
- lang: eng
text: AbstractMetasurface holography offers a powerful approach
for manipulating wavefronts at the nano and micro scale. Extensive research has
been conducted to enhance the multiplexing capacity for diverse wavefronts. However,
the independence of multiplexed channels is fundamentally restricted in techniques
using single‐layer metasurfaces, resulting in unavoidable crosstalk and the need
for post‐filtering of the output wavefronts. Here, a universal wavefront multiplexing
concept is presented based on non‐injective transformation. By employing joint
optimization on two metasurfaces, different channels can be independently designed
without any constraints on the output wavefronts. To validate this approach, ultra‐compact
orbital angular momentum (OAM) sorters are designed. In these experiments, the
output beams from different channels can be independently mapped to 2D positions
with high fineness. In another application of wavefront‐multiplexed holography,
10‐channel multiplexing is experimentally achieved with minimal crosstalk and
without the need for post‐processing. These results demonstrate the independence
between channels enabled by the non‐injective transformation in the method. The
precise wavefront control and high multiplexing capacity underscore its potential
for scalable wavefront manipulation devices.
article_number: e11823
article_type: original
author:
- first_name: Xiao
full_name: Jin, Xiao
last_name: Jin
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: Jin X, Zentgraf T. Independent Wavefront Multiplexing with Metasurfaces via
Non‐Injective Transformation. Advanced Materials. 2026;38. doi:10.1002/adma.202511823
apa: Jin, X., & Zentgraf, T. (2026). Independent Wavefront Multiplexing with
Metasurfaces via Non‐Injective Transformation. Advanced Materials, 38,
Article e11823. https://doi.org/10.1002/adma.202511823
bibtex: '@article{Jin_Zentgraf_2026, title={Independent Wavefront Multiplexing with
Metasurfaces via Non‐Injective Transformation}, volume={38}, DOI={10.1002/adma.202511823},
number={e11823}, journal={Advanced Materials}, publisher={Wiley}, author={Jin,
Xiao and Zentgraf, Thomas}, year={2026} }'
chicago: Jin, Xiao, and Thomas Zentgraf. “Independent Wavefront Multiplexing with
Metasurfaces via Non‐Injective Transformation.” Advanced Materials 38 (2026).
https://doi.org/10.1002/adma.202511823.
ieee: 'X. Jin and T. Zentgraf, “Independent Wavefront Multiplexing with Metasurfaces
via Non‐Injective Transformation,” Advanced Materials, vol. 38, Art. no.
e11823, 2026, doi: 10.1002/adma.202511823.'
mla: Jin, Xiao, and Thomas Zentgraf. “Independent Wavefront Multiplexing with Metasurfaces
via Non‐Injective Transformation.” Advanced Materials, vol. 38, e11823,
Wiley, 2026, doi:10.1002/adma.202511823.
short: X. Jin, T. Zentgraf, Advanced Materials 38 (2026).
date_created: 2025-10-06T05:42:21Z
date_updated: 2026-03-10T08:32:37Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1002/adma.202511823
intvolume: ' 38'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202511823
oa: '1'
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: '65'
name: 'TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van
der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten'
- _id: '170'
name: 'TRR 142; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage
der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen'
publication: Advanced Materials
publication_identifier:
issn:
- 0935-9648
- 1521-4095
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation
type: journal_article
user_id: '30525'
volume: 38
year: '2026'
...
---
_id: '63531'
author:
- first_name: Siddharth
full_name: Doshi, Siddharth
last_name: Doshi
- first_name: Nicholas Alexander
full_name: Güsken, Nicholas Alexander
id: '112030'
last_name: Güsken
orcid: 0000-0002-4816-0666
- first_name: Gerwin
full_name: Dijk, Gerwin
last_name: Dijk
- first_name: Johan
full_name: Carlström, Johan
last_name: Carlström
- first_name: Jennifer E.
full_name: Ortiz-Cárdenas, Jennifer E.
last_name: Ortiz-Cárdenas
- first_name: Peter
full_name: Suzuki, Peter
last_name: Suzuki
- first_name: Bohan
full_name: Li, Bohan
last_name: Li
- first_name: Polly M.
full_name: Fordyce, Polly M.
last_name: Fordyce
- first_name: Alberto
full_name: Salleo, Alberto
last_name: Salleo
- first_name: Nicholas A.
full_name: Melosh, Nicholas A.
last_name: Melosh
- first_name: Mark L.
full_name: Brongersma, Mark L.
last_name: Brongersma
citation:
ama: Doshi S, Güsken NA, Dijk G, et al. Soft photonic skins with dynamic texture
and colour control. Nature. 2026;649(8096):345-352. doi:10.1038/s41586-025-09948-2
apa: Doshi, S., Güsken, N. A., Dijk, G., Carlström, J., Ortiz-Cárdenas, J. E., Suzuki,
P., Li, B., Fordyce, P. M., Salleo, A., Melosh, N. A., & Brongersma, M. L.
(2026). Soft photonic skins with dynamic texture and colour control. Nature,
649(8096), 345–352. https://doi.org/10.1038/s41586-025-09948-2
bibtex: '@article{Doshi_Güsken_Dijk_Carlström_Ortiz-Cárdenas_Suzuki_Li_Fordyce_Salleo_Melosh_et
al._2026, title={Soft photonic skins with dynamic texture and colour control},
volume={649}, DOI={10.1038/s41586-025-09948-2},
number={8096}, journal={Nature}, publisher={Springer Science and Business Media
LLC}, author={Doshi, Siddharth and Güsken, Nicholas Alexander and Dijk, Gerwin
and Carlström, Johan and Ortiz-Cárdenas, Jennifer E. and Suzuki, Peter and Li,
Bohan and Fordyce, Polly M. and Salleo, Alberto and Melosh, Nicholas A. and et
al.}, year={2026}, pages={345–352} }'
chicago: 'Doshi, Siddharth, Nicholas Alexander Güsken, Gerwin Dijk, Johan Carlström,
Jennifer E. Ortiz-Cárdenas, Peter Suzuki, Bohan Li, et al. “Soft Photonic Skins
with Dynamic Texture and Colour Control.” Nature 649, no. 8096 (2026):
345–52. https://doi.org/10.1038/s41586-025-09948-2.'
ieee: 'S. Doshi et al., “Soft photonic skins with dynamic texture and colour
control,” Nature, vol. 649, no. 8096, pp. 345–352, 2026, doi: 10.1038/s41586-025-09948-2.'
mla: Doshi, Siddharth, et al. “Soft Photonic Skins with Dynamic Texture and Colour
Control.” Nature, vol. 649, no. 8096, Springer Science and Business Media
LLC, 2026, pp. 345–52, doi:10.1038/s41586-025-09948-2.
short: S. Doshi, N.A. Güsken, G. Dijk, J. Carlström, J.E. Ortiz-Cárdenas, P. Suzuki,
B. Li, P.M. Fordyce, A. Salleo, N.A. Melosh, M.L. Brongersma, Nature 649 (2026)
345–352.
date_created: 2026-01-08T12:55:30Z
date_updated: 2026-01-08T13:22:16Z
department:
- _id: '623'
- _id: '15'
- _id: '230'
doi: 10.1038/s41586-025-09948-2
intvolume: ' 649'
issue: '8096'
language:
- iso: eng
page: 345-352
publication: Nature
publication_identifier:
issn:
- 0028-0836
- 1476-4687
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Soft photonic skins with dynamic texture and colour control
type: journal_article
user_id: '112030'
volume: 649
year: '2026'
...
---
_id: '64877'
author:
- first_name: Behnood
full_name: Taheri, Behnood
last_name: Taheri
- first_name: Denis
full_name: Kopylov, Denis
id: '98502'
last_name: Kopylov
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
citation:
ama: Taheri B, Kopylov D, Hammer M, Meier T, Förstner J, Sharapova PR. Gain-induced
spectral non-degeneracy in type-II parametric down-conversion. arXiv. Published
online 2026. doi:10.48550/ARXIV.2603.01656
apa: Taheri, B., Kopylov, D., Hammer, M., Meier, T., Förstner, J., & Sharapova,
P. R. (2026). Gain-induced spectral non-degeneracy in type-II parametric down-conversion.
ArXiv. https://doi.org/10.48550/ARXIV.2603.01656
bibtex: '@article{Taheri_Kopylov_Hammer_Meier_Förstner_Sharapova_2026, title={Gain-induced
spectral non-degeneracy in type-II parametric down-conversion}, DOI={10.48550/ARXIV.2603.01656},
journal={arXiv}, author={Taheri, Behnood and Kopylov, Denis and Hammer, Manfred
and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}, year={2026} }'
chicago: Taheri, Behnood, Denis Kopylov, Manfred Hammer, Torsten Meier, Jens Förstner,
and Polina R. Sharapova. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric
down-Conversion.” ArXiv, 2026. https://doi.org/10.48550/ARXIV.2603.01656.
ieee: 'B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, and P. R. Sharapova,
“Gain-induced spectral non-degeneracy in type-II parametric down-conversion,”
arXiv, 2026, doi: 10.48550/ARXIV.2603.01656.'
mla: Taheri, Behnood, et al. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric
down-Conversion.” ArXiv, 2026, doi:10.48550/ARXIV.2603.01656.
short: B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, P.R. Sharapova,
ArXiv (2026).
date_created: 2026-03-10T15:37:22Z
date_updated: 2026-03-10T15:41:18Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '34'
- _id: '61'
- _id: '230'
- _id: '623'
- _id: '429'
doi: 10.48550/ARXIV.2603.01656
language:
- iso: eng
project:
- _id: '168'
name: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat
(B07*)
- _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'
publication: arXiv
status: public
title: Gain-induced spectral non-degeneracy in type-II parametric down-conversion
type: journal_article
user_id: '16199'
year: '2026'
...
---
_id: '64978'
abstract:
- lang: eng
text: "The degrees of freedom (DoFs) of light determine the maximum number of independent
signal\r\nchannels an optical system can support. However, the polarization DoF
is intrinsically limited to two by\r\northogonality, which causes unavoidable
crosstalk and often forces position multiplexing, where different\r\nchannels
are assigned to distinct spatial locations to suppress crosstalk. This research
introduces a multilayer\r\nsynchronous polarization projection method that fundamentally
increases the DoF for polarization\r\nmultiplexing. The DoF equals twice the number
of projection layers. We experimentally demonstrate six-\r\nchannel polarization
multiplexing holography without position multiplexing. The six-channel multiplexing\r\nresults
indicate that our approach exceeds the conventional polarization multiplexing
method, yielding an\r\naverage 3.79 dB improvement in extinction ratio across
the six channels. Compared with the theoretical\r\nlimit of traditional polarization
multiplexing, our method reduces crosstalk by an average of 6.52 dB across\r\nall
channels in a seven-channel design. The polarization projection method breaks
the DoF limitation\r\nof polarization multiplexing, opening a path toward high-dimensional
photonic information encoding for\r\ncommunication, encryption, and imaging."
article_number: '26010'
article_type: original
author:
- first_name: Xiao
full_name: Jin, Xiao
last_name: Jin
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: Jin X, Zentgraf T. Increasing the design degree of freedom for polarization
through multilayer synchronous polarization projection. Advanced Photonics.
2026;8(02). doi:10.1117/1.ap.8.2.026010
apa: Jin, X., & Zentgraf, T. (2026). Increasing the design degree of freedom
for polarization through multilayer synchronous polarization projection. Advanced
Photonics, 8(02), Article 26010. https://doi.org/10.1117/1.ap.8.2.026010
bibtex: '@article{Jin_Zentgraf_2026, title={Increasing the design degree of freedom
for polarization through multilayer synchronous polarization projection}, volume={8},
DOI={10.1117/1.ap.8.2.026010},
number={0226010}, journal={Advanced Photonics}, publisher={SPIE-Intl Soc Optical
Eng}, author={Jin, Xiao and Zentgraf, Thomas}, year={2026} }'
chicago: Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom
for Polarization through Multilayer Synchronous Polarization Projection.” Advanced
Photonics 8, no. 02 (2026). https://doi.org/10.1117/1.ap.8.2.026010.
ieee: 'X. Jin and T. Zentgraf, “Increasing the design degree of freedom for polarization
through multilayer synchronous polarization projection,” Advanced Photonics,
vol. 8, no. 02, Art. no. 26010, 2026, doi: 10.1117/1.ap.8.2.026010.'
mla: Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for
Polarization through Multilayer Synchronous Polarization Projection.” Advanced
Photonics, vol. 8, no. 02, 26010, SPIE-Intl Soc Optical Eng, 2026, doi:10.1117/1.ap.8.2.026010.
short: X. Jin, T. Zentgraf, Advanced Photonics 8 (2026).
date_created: 2026-03-16T07:17:52Z
date_updated: 2026-03-16T07:20:07Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1117/1.ap.8.2.026010
intvolume: ' 8'
issue: '02'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.researching.cn/Articles/OJafd1e3b9e643c6be
oa: '1'
publication: Advanced Photonics
publication_identifier:
issn:
- 2577-5421
publication_status: published
publisher: SPIE-Intl Soc Optical Eng
quality_controlled: '1'
status: public
title: Increasing the design degree of freedom for polarization through multilayer
synchronous polarization projection
type: journal_article
user_id: '30525'
volume: 8
year: '2026'
...
---
_id: '65357'
author:
- first_name: Minjun
full_name: Kim, Minjun
last_name: Kim
- first_name: Vasanthan
full_name: Devaraj, Vasanthan
last_name: Devaraj
- first_name: Hyeon-Seok
full_name: Seo, Hyeon-Seok
last_name: Seo
- first_name: Seongjae
full_name: Eom, Seongjae
last_name: Eom
- first_name: Jeong-Su
full_name: Lee, Jeong-Su
last_name: Lee
- first_name: Donghan
full_name: Lee, Donghan
last_name: Lee
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Jong-Min
full_name: Lee, Jong-Min
last_name: Lee
- first_name: Min Yong
full_name: Jeon, Min Yong
last_name: Jeon
citation:
ama: 'Kim M, Devaraj V, Seo H-S, et al. Fabrication of uniform, high-field-enhanced
plasmonic satellite clusters using multidewetting. In: Razeghi M, Khodaparast
GA, Vitiello MS, eds. Quantum Sensing and Nano Electronics and Photonics XXII.
SPIE; 2026. doi:10.1117/12.3095416'
apa: Kim, M., Devaraj, V., Seo, H.-S., Eom, S., Lee, J.-S., Lee, D., Zentgraf, T.,
Lee, J.-M., & Jeon, M. Y. (2026). Fabrication of uniform, high-field-enhanced
plasmonic satellite clusters using multidewetting. In M. Razeghi, G. A. Khodaparast,
& M. S. Vitiello (Eds.), Quantum Sensing and Nano Electronics and Photonics
XXII. SPIE. https://doi.org/10.1117/12.3095416
bibtex: '@inproceedings{Kim_Devaraj_Seo_Eom_Lee_Lee_Zentgraf_Lee_Jeon_2026, title={Fabrication
of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting},
DOI={10.1117/12.3095416}, booktitle={Quantum
Sensing and Nano Electronics and Photonics XXII}, publisher={SPIE}, author={Kim,
Minjun and Devaraj, Vasanthan and Seo, Hyeon-Seok and Eom, Seongjae and Lee, Jeong-Su
and Lee, Donghan and Zentgraf, Thomas and Lee, Jong-Min and Jeon, Min Yong}, editor={Razeghi,
Manijeh and Khodaparast, Giti A. and Vitiello, Miriam S.}, year={2026} }'
chicago: Kim, Minjun, Vasanthan Devaraj, Hyeon-Seok Seo, Seongjae Eom, Jeong-Su
Lee, Donghan Lee, Thomas Zentgraf, Jong-Min Lee, and Min Yong Jeon. “Fabrication
of Uniform, High-Field-Enhanced Plasmonic Satellite Clusters Using Multidewetting.”
In Quantum Sensing and Nano Electronics and Photonics XXII, edited by Manijeh
Razeghi, Giti A. Khodaparast, and Miriam S. Vitiello. SPIE, 2026. https://doi.org/10.1117/12.3095416.
ieee: 'M. Kim et al., “Fabrication of uniform, high-field-enhanced plasmonic
satellite clusters using multidewetting,” in Quantum Sensing and Nano Electronics
and Photonics XXII, 2026, doi: 10.1117/12.3095416.'
mla: Kim, Minjun, et al. “Fabrication of Uniform, High-Field-Enhanced Plasmonic
Satellite Clusters Using Multidewetting.” Quantum Sensing and Nano Electronics
and Photonics XXII, edited by Manijeh Razeghi et al., SPIE, 2026, doi:10.1117/12.3095416.
short: 'M. Kim, V. Devaraj, H.-S. Seo, S. Eom, J.-S. Lee, D. Lee, T. Zentgraf, J.-M.
Lee, M.Y. Jeon, in: M. Razeghi, G.A. Khodaparast, M.S. Vitiello (Eds.), Quantum
Sensing and Nano Electronics and Photonics XXII, SPIE, 2026.'
date_created: 2026-04-07T04:29:28Z
date_updated: 2026-04-07T04:30:07Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1117/12.3095416
editor:
- first_name: Manijeh
full_name: Razeghi, Manijeh
last_name: Razeghi
- first_name: Giti A.
full_name: Khodaparast, Giti A.
last_name: Khodaparast
- first_name: Miriam S.
full_name: Vitiello, Miriam S.
last_name: Vitiello
language:
- iso: eng
publication: Quantum Sensing and Nano Electronics and Photonics XXII
publication_status: published
publisher: SPIE
status: public
title: Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using
multidewetting
type: conference
user_id: '30525'
year: '2026'
...
---
_id: '65460'
abstract:
- lang: eng
text: "Beamsplitters represent fundamental components in both classical and quantum
optical systems, enabling the distribution of light, as well as the generation
of interference, superposition, and entanglement. However, optical networks constructed
from conventional bulk 2 × 2-beamsplitters encounter inherent scalability issues,
as the number of required beamsplitters scales quadratically with the number of
optical modes for a fully connected network. Metasurfaces offer a promising route
to\r\novercome these constraints. By manipulating light at the wavelength scale,
compact optical components with advanced functionalities can be constructed, which
address several modes simultaneously. In this work, we design and experimentally
utilize a metasurface as a multiport beamsplitter. Furthermore, we realized a
multimode interferometer composed of two cascaded metasurfaces. We characterize
the individual and cascaded metasurfaces by using classical light, showing controllable
splitting ratios through tunable phase relations. We then expand the approach
to quantum light, employing single photons to demonstrate second- and third-order
photon correlations as well as single photon interference across multiple spatial
paths. These results establish metasurface-based multiport beamsplitters as a
scalable and reconfigurable platform bridging classical and quantum photonics. "
article_number: acsphotonics.6c00096
article_type: original
author:
- first_name: Rebecca
full_name: Aschwanden, Rebecca
last_name: Aschwanden
- first_name: Nicolás
full_name: Claro-Rodríguez, Nicolás
last_name: Claro-Rodríguez
- first_name: Ruizhe
full_name: Zhao, Ruizhe
last_name: Zhao
- first_name: Patricia Anna Maria
full_name: Kallert, Patricia Anna Maria
id: '72332'
last_name: Kallert
orcid: 0009-0007-5230-0223
- first_name: Tobias
full_name: Krieger, Tobias
last_name: Krieger
- first_name: Quirin
full_name: Buchinger, Quirin
last_name: Buchinger
- first_name: Saimon F.
full_name: Covre da Silva, Saimon F.
last_name: Covre da Silva
- first_name: Sandra
full_name: Stroj, Sandra
last_name: Stroj
- first_name: Michele
full_name: Rota, Michele
last_name: Rota
- first_name: Sven
full_name: Höfling, Sven
last_name: Höfling
- first_name: Tobias
full_name: Huber-Loyola, Tobias
last_name: Huber-Loyola
- first_name: Armando
full_name: Rastelli, Armando
last_name: Rastelli
- first_name: Rinaldo
full_name: Trotta, Rinaldo
last_name: Trotta
- first_name: Lingling
full_name: Huang, Lingling
last_name: Huang
- first_name: Tim
full_name: Bartley, Tim
id: '49683'
last_name: Bartley
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: Aschwanden R, Claro-Rodríguez N, Zhao R, et al. Cascaded Metasurface Interferometer
for Multipath Interference with Classical and Quantum Light. ACS Photonics.
Published online 2026. doi:10.1021/acsphotonics.6c00096
apa: Aschwanden, R., Claro-Rodríguez, N., Zhao, R., Kallert, P. A. M., Krieger,
T., Buchinger, Q., Covre da Silva, S. F., Stroj, S., Rota, M., Höfling, S., Huber-Loyola,
T., Rastelli, A., Trotta, R., Huang, L., Bartley, T., Jöns, K., & Zentgraf,
T. (2026). Cascaded Metasurface Interferometer for Multipath Interference with
Classical and Quantum Light. ACS Photonics, Article acsphotonics.6c00096.
https://doi.org/10.1021/acsphotonics.6c00096
bibtex: '@article{Aschwanden_Claro-Rodríguez_Zhao_Kallert_Krieger_Buchinger_Covre
da Silva_Stroj_Rota_Höfling_et al._2026, title={Cascaded Metasurface Interferometer
for Multipath Interference with Classical and Quantum Light}, DOI={10.1021/acsphotonics.6c00096},
number={acsphotonics.6c00096}, journal={ACS Photonics}, publisher={American Chemical
Society (ACS)}, author={Aschwanden, Rebecca and Claro-Rodríguez, Nicolás and Zhao,
Ruizhe and Kallert, Patricia Anna Maria and Krieger, Tobias and Buchinger, Quirin
and Covre da Silva, Saimon F. and Stroj, Sandra and Rota, Michele and Höfling,
Sven and et al.}, year={2026} }'
chicago: Aschwanden, Rebecca, Nicolás Claro-Rodríguez, Ruizhe Zhao, Patricia Anna
Maria Kallert, Tobias Krieger, Quirin Buchinger, Saimon F. Covre da Silva, et
al. “Cascaded Metasurface Interferometer for Multipath Interference with Classical
and Quantum Light.” ACS Photonics, 2026. https://doi.org/10.1021/acsphotonics.6c00096.
ieee: 'R. Aschwanden et al., “Cascaded Metasurface Interferometer for Multipath
Interference with Classical and Quantum Light,” ACS Photonics, Art. no.
acsphotonics.6c00096, 2026, doi: 10.1021/acsphotonics.6c00096.'
mla: Aschwanden, Rebecca, et al. “Cascaded Metasurface Interferometer for Multipath
Interference with Classical and Quantum Light.” ACS Photonics, acsphotonics.6c00096,
American Chemical Society (ACS), 2026, doi:10.1021/acsphotonics.6c00096.
short: R. Aschwanden, N. Claro-Rodríguez, R. Zhao, P.A.M. Kallert, T. Krieger, Q.
Buchinger, S.F. Covre da Silva, S. Stroj, M. Rota, S. Höfling, T. Huber-Loyola,
A. Rastelli, R. Trotta, L. Huang, T. Bartley, K. Jöns, T. Zentgraf, ACS Photonics
(2026).
date_created: 2026-04-20T04:52:59Z
date_updated: 2026-04-20T05:01:00Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1021/acsphotonics.6c00096
external_id:
arxiv:
- '2603.25090'
keyword:
- metasurface
- beamsplitter
- interferometer
- quantum network
- single photons
- nanophotonics
language:
- iso: eng
main_file_link:
- url: https://pubs.acs.org/doi/10.1021/acsphotonics.6c00096
project:
- _id: '54'
name: TRR 142 - Project Area A
- _id: '65'
name: 'TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van
der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten'
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
publication: ACS Photonics
publication_identifier:
issn:
- 2330-4022
- 2330-4022
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Cascaded Metasurface Interferometer for Multipath Interference with Classical
and Quantum Light
type: journal_article
user_id: '30525'
year: '2026'
...
---
_id: '65316'
abstract:
- lang: eng
text: Metasurfaces are powerful tools for manipulating light using small structures
on the nanoscale. In most metasurfaces, near-field couplings are treated as being
unfavorable perturbations. Here, we experimentally investigate a structure consisting
of sinusoidally modulated silicon waveguides where near-field coupling of local
resonances leads to negative coupling, i.e., a negative coupling constant. This
gives rise to wave-vector-dependent eigenstates of elliptical, linear, and circular
polarizations. In particular, fully circular polarization states are not only
present at a single point in momentum space (k-space) but also along a line. This
circular polarization line, as well as a linear polarization line, emanates from
a polarization degeneracy at the Dirac point. We experimentally validate the existence
of these eigenstates and demonstrate the energy-, polarization-, and wave vector
dependence of this metasurface as well as its sensitivity to fabrication tolerances.
By tuning the incident k-vector, certain polarization-energy eigenstates are strongly
reflected, allowing for uses in angle-tunable polarization filters and light sources.
author:
- first_name: Helene
full_name: Wetter, Helene
last_name: Wetter
- first_name: Jan
full_name: Wingenbach, Jan
id: '69187'
last_name: Wingenbach
- first_name: Falk
full_name: Rehberg, Falk
last_name: Rehberg
- first_name: Wenlong
full_name: Gao, Wenlong
last_name: Gao
- 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, Wingenbach J, Rehberg F, Gao W, Schumacher S, Zentgraf T. Polarization-
and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. ACS
Photonics. 2026;13:2128-2133. doi:10.1021/acsphotonics.5c02865
apa: Wetter, H., Wingenbach, J., Rehberg, F., Gao, W., Schumacher, S., & Zentgraf,
T. (2026). Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field
Coupling. ACS Photonics, 13, 2128–2133. https://doi.org/10.1021/acsphotonics.5c02865
bibtex: '@article{Wetter_Wingenbach_Rehberg_Gao_Schumacher_Zentgraf_2026, title={Polarization-
and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}, volume={13},
DOI={10.1021/acsphotonics.5c02865},
journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Wetter,
Helene and Wingenbach, Jan and Rehberg, Falk and Gao, Wenlong and Schumacher,
Stefan and Zentgraf, Thomas}, year={2026}, pages={2128–2133} }'
chicago: 'Wetter, Helene, Jan Wingenbach, Falk Rehberg, Wenlong Gao, Stefan Schumacher,
and Thomas Zentgraf. “Polarization- and Wave-Vector Selective Optical Metasurface
with Near-Field Coupling.” ACS Photonics 13 (2026): 2128–33. https://doi.org/10.1021/acsphotonics.5c02865.'
ieee: 'H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, and T. Zentgraf,
“Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling,”
ACS Photonics, vol. 13, pp. 2128–2133, 2026, doi: 10.1021/acsphotonics.5c02865.'
mla: Wetter, Helene, et al. “Polarization- and Wave-Vector Selective Optical Metasurface
with Near-Field Coupling.” ACS Photonics, vol. 13, American Chemical Society
(ACS), 2026, pp. 2128–33, doi:10.1021/acsphotonics.5c02865.
short: H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, T. Zentgraf,
ACS Photonics 13 (2026) 2128–2133.
date_created: 2026-04-02T07:25:30Z
date_updated: 2026-04-20T05:09:57Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1021/acsphotonics.5c02865
external_id:
arxiv:
- '2512.14452'
intvolume: ' 13'
keyword:
- metasurface
- waveguides
- Dirac point
- polarization
- negative coupling
language:
- iso: eng
main_file_link:
- url: https://pubs.acs.org/doi/10.1021/acsphotonics.5c02865
page: 2128-2133
publication: ACS Photonics
publication_identifier:
issn:
- 2330-4022
- 2330-4022
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field
Coupling
type: journal_article
user_id: '30525'
volume: 13
year: '2026'
...
---
_id: '60022'
author:
- first_name: Michael
full_name: Brauckmann, Michael
last_name: Brauckmann
- first_name: Emmanuel
full_name: Narvaez Castaneda, Emmanuel
last_name: Narvaez Castaneda
- first_name: Dustin
full_name: Siebert, Dustin
last_name: Siebert
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: 'Brauckmann M, Narvaez Castaneda E, Siebert D, Brecht B, Förstner J, Zentgraf
T. Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators.
In: Proceedings of The 15th International Conference on Metamaterials, Photonic
Crystals and Plasmonics. ; 2025.'
apa: Brauckmann, M., Narvaez Castaneda, E., Siebert, D., Brecht, B., Förstner, J.,
& Zentgraf, T. (2025). Enhancement Of Light-matter Interaction In Topological
Waveguides And Resonators. Proceedings of The 15th International Conference
on Metamaterials, Photonic Crystals and Plasmonics. META 2025 - The 15th International
Conference on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain.
bibtex: '@inproceedings{Brauckmann_Narvaez Castaneda_Siebert_Brecht_Förstner_Zentgraf_2025,
title={Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators},
booktitle={Proceedings of The 15th International Conference on Metamaterials,
Photonic Crystals and Plasmonics}, author={Brauckmann, Michael and Narvaez Castaneda,
Emmanuel and Siebert, Dustin and Brecht, Benjamin and Förstner, Jens and Zentgraf,
Thomas}, year={2025} }'
chicago: Brauckmann, Michael, Emmanuel Narvaez Castaneda, Dustin Siebert, Benjamin
Brecht, Jens Förstner, and Thomas Zentgraf. “Enhancement Of Light-Matter Interaction
In Topological Waveguides And Resonators.” In Proceedings of The 15th International
Conference on Metamaterials, Photonic Crystals and Plasmonics, 2025.
ieee: M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner, and
T. Zentgraf, “Enhancement Of Light-matter Interaction In Topological Waveguides
And Resonators,” presented at the META 2025 - The 15th International Conference
on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain, 2025.
mla: Brauckmann, Michael, et al. “Enhancement Of Light-Matter Interaction In Topological
Waveguides And Resonators.” Proceedings of The 15th International Conference
on Metamaterials, Photonic Crystals and Plasmonics, 2025.
short: 'M. Brauckmann, E. Narvaez Castaneda, D. Siebert, B. Brecht, J. Förstner,
T. Zentgraf, in: Proceedings of The 15th International Conference on Metamaterials,
Photonic Crystals and Plasmonics, 2025.'
conference:
end_date: 2025-07-25
location: Malaga, Spain
name: META 2025 - The 15th International Conference on Metamaterials, Photonic Crystals
and Plasmonics
start_date: 2025-07-22
date_created: 2025-05-23T06:10:53Z
date_updated: 2025-05-23T06:11:20Z
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 15th International Conference on Metamaterials, Photonic
Crystals and Plasmonics
status: public
title: Enhancement Of Light-matter Interaction In Topological Waveguides And Resonators
type: conference
user_id: '30525'
year: '2025'
...
---
_id: '60565'
article_number: '104103'
author:
- first_name: Adriana
full_name: Bocchini, Adriana
id: '58349'
last_name: Bocchini
orcid: 0000-0002-2134-3075
- 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: Bocchini A, Gerstmann U, Schmidt WG. Microscopic origin of gray tracks in <mml:math
xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>.
Physical Review B. 2025;111(10). doi:10.1103/physrevb.111.104103
apa: Bocchini, A., Gerstmann, U., & Schmidt, W. G. (2025). Microscopic origin
of gray tracks in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>.
Physical Review B, 111(10), Article 104103. https://doi.org/10.1103/physrevb.111.104103
bibtex: '@article{Bocchini_Gerstmann_Schmidt_2025, title={Microscopic origin of
gray tracks in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>},
volume={111}, DOI={10.1103/physrevb.111.104103},
number={10104103}, journal={Physical Review B}, publisher={American Physical Society
(APS)}, author={Bocchini, Adriana and Gerstmann, Uwe and Schmidt, Wolf Gero},
year={2025} }'
chicago: Bocchini, Adriana, Uwe Gerstmann, and Wolf Gero Schmidt. “Microscopic Origin
of Gray Tracks in <mml:Math Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Msub><mml:Mi>KTiOPO</Mml:Mi><mml:Mn>4</Mml:Mn></Mml:Msub></Mml:Math>.”
Physical Review B 111, no. 10 (2025). https://doi.org/10.1103/physrevb.111.104103.
ieee: 'A. Bocchini, U. Gerstmann, and W. G. Schmidt, “Microscopic origin of gray
tracks in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>,”
Physical Review B, vol. 111, no. 10, Art. no. 104103, 2025, doi: 10.1103/physrevb.111.104103.'
mla: Bocchini, Adriana, et al. “Microscopic Origin of Gray Tracks in <mml:Math
Xmlns:Mml="http://Www.W3.Org/1998/Math/MathML"><mml:Msub><mml:Mi>KTiOPO</Mml:Mi><mml:Mn>4</Mml:Mn></Mml:Msub></Mml:Math>.”
Physical Review B, vol. 111, no. 10, 104103, American Physical Society
(APS), 2025, doi:10.1103/physrevb.111.104103.
short: A. Bocchini, U. Gerstmann, W.G. Schmidt, Physical Review B 111 (2025).
date_created: 2025-07-09T08:58:32Z
date_updated: 2025-07-09T09:30:31Z
department:
- _id: '15'
- _id: '295'
- _id: '790'
- _id: '230'
- _id: '429'
- _id: '35'
- _id: '170'
- _id: '27'
doi: 10.1103/physrevb.111.104103
intvolume: ' 111'
issue: '10'
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: '54'
name: 'TRR 142 - A: TRR 142 - Project Area A'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '168'
grant_number: '231447078'
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 B
publication_identifier:
issn:
- 2469-9950
- 2469-9969
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Microscopic origin of gray tracks in KTiOPO4
type: journal_article
user_id: '16199'
volume: 111
year: '2025'
...
---
_id: '60580'
abstract:
- lang: eng
text: AbstractAlInP (001) is widely utilized as
a window layer in optoelectronic devices, including world‐record III‐V multi‐junction
solar cells and photoelectrochemical (PEC) cells. The chemical and electronic
properties of AlInP (001) depend on its surface reconstruction, which impacts
its interaction with electrolytes in PEC applications and passivation layers.
This study investigates AlInP (001) surface reconstructions using density functional
theory and experimental methods. Phosphorus‐rich (P‐rich) and indium‐rich (In‐rich)
AlInP surfaces are prepared with in situ monitoring of the process by reflection
anisotropy (RA) spectroscopy and confirmed by low‐energy electron diffraction
and photoemission spectroscopy. The experimental RA spectra closely match the
theoretical predictions obtained by solving the Bethe–Salpeter equation. It is
shown that missing hydrogen on P‐rich surfaces and formation of In–In 1D atomic
chains on In‐rich surfaces introduce mid‐gap surface states that pin the Fermi
level and induce band bending. Time‐resolved two‐photon photoemission measurements
reveal ultrafast near‐surface electron dynamics for both P‐rich and In‐rich surfaces,
demonstrating photoexcited electrons reaching the surface conduction band minimum
and relaxing to mid‐gap surface states on about hundreds of fs. This work provides
the most extensive AlInP surface analysis to date, allowing for more targeted
surface and interface engineering, which is crucial for the optimization and design
of III‐V heterostructures.
author:
- first_name: Mohammad Amin
full_name: Zare Pour, Mohammad Amin
last_name: Zare Pour
- first_name: Sahar
full_name: Shekarabi, Sahar
last_name: Shekarabi
- first_name: Isaac Azahel
full_name: Ruiz Alvarado, Isaac Azahel
id: '79462'
last_name: Ruiz Alvarado
orcid: 0000-0002-4710-1170
- first_name: Jonathan
full_name: Diederich, Jonathan
last_name: Diederich
- first_name: Yuyings
full_name: Gao, Yuyings
last_name: Gao
- first_name: Agnieszka
full_name: Paszuk, Agnieszka
last_name: Paszuk
- first_name: Dominik C.
full_name: Moritz, Dominik C.
last_name: Moritz
- first_name: Wolfram
full_name: Jaegermann, Wolfram
last_name: Jaegermann
- first_name: Dennis
full_name: Friedrich, Dennis
last_name: Friedrich
- first_name: Roel
full_name: van de Krol, Roel
last_name: van de Krol
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Thomas
full_name: Hannappel, Thomas
last_name: Hannappel
citation:
ama: 'Zare Pour MA, Shekarabi S, Ruiz Alvarado IA, et al. Exploring Electronic States
and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.
Advanced Functional Materials. Published online 2025. doi:10.1002/adfm.202423702'
apa: 'Zare Pour, M. A., Shekarabi, S., Ruiz Alvarado, I. A., Diederich, J., Gao,
Y., Paszuk, A., Moritz, D. C., Jaegermann, W., Friedrich, D., van de Krol, R.,
Schmidt, W. G., & Hannappel, T. (2025). Exploring Electronic States and Ultrafast
Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.
Advanced Functional Materials. https://doi.org/10.1002/adfm.202423702'
bibtex: '@article{Zare Pour_Shekarabi_Ruiz Alvarado_Diederich_Gao_Paszuk_Moritz_Jaegermann_Friedrich_van
de Krol_et al._2025, title={Exploring Electronic States and Ultrafast Electron
Dynamics in AlInP Window Layers: The Role of Surface Reconstruction}, DOI={10.1002/adfm.202423702}, journal={Advanced
Functional Materials}, publisher={Wiley}, author={Zare Pour, Mohammad Amin and
Shekarabi, Sahar and Ruiz Alvarado, Isaac Azahel and Diederich, Jonathan and Gao,
Yuyings and Paszuk, Agnieszka and Moritz, Dominik C. and Jaegermann, Wolfram and
Friedrich, Dennis and van de Krol, Roel and et al.}, year={2025} }'
chicago: 'Zare Pour, Mohammad Amin, Sahar Shekarabi, Isaac Azahel Ruiz Alvarado,
Jonathan Diederich, Yuyings Gao, Agnieszka Paszuk, Dominik C. Moritz, et al. “Exploring
Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The
Role of Surface Reconstruction.” Advanced Functional Materials, 2025. https://doi.org/10.1002/adfm.202423702.'
ieee: 'M. A. Zare Pour et al., “Exploring Electronic States and Ultrafast
Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction,”
Advanced Functional Materials, 2025, doi: 10.1002/adfm.202423702.'
mla: 'Zare Pour, Mohammad Amin, et al. “Exploring Electronic States and Ultrafast
Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.”
Advanced Functional Materials, Wiley, 2025, doi:10.1002/adfm.202423702.'
short: M.A. Zare Pour, S. Shekarabi, I.A. Ruiz Alvarado, J. Diederich, Y. Gao, A.
Paszuk, D.C. Moritz, W. Jaegermann, D. Friedrich, R. van de Krol, W.G. Schmidt,
T. Hannappel, Advanced Functional Materials (2025).
date_created: 2025-07-09T13:33:15Z
date_updated: 2025-07-09T13:54:05Z
department:
- _id: '15'
- _id: '170'
- _id: '230'
- _id: '27'
- _id: '295'
doi: 10.1002/adfm.202423702
language:
- iso: eng
publication: Advanced Functional Materials
publication_identifier:
issn:
- 1616-301X
- 1616-3028
publication_status: published
publisher: Wiley
status: public
title: 'Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window
Layers: The Role of Surface Reconstruction'
type: journal_article
user_id: '79462'
year: '2025'
...
---
_id: '58642'
abstract:
- lang: eng
text: We present a cost-effective self-assembly method to fabricate low-density
dimer NPs in an NPoM architecture, using the M13 phage as a spacer layer. This
will enable the development of dynamic plasmonic devices and advanced sensing
applications.
article_type: original
author:
- first_name: Vasanthan
full_name: Devaraj, Vasanthan
id: '103814'
last_name: Devaraj
- first_name: Isaac Azahel
full_name: Ruiz Alvarado, Isaac Azahel
id: '79462'
last_name: Ruiz Alvarado
orcid: 0000-0002-4710-1170
- first_name: Jong-Min
full_name: Lee, Jong-Min
last_name: Lee
- first_name: Jin-Woo
full_name: Oh, Jin-Woo
last_name: Oh
- 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
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
citation:
ama: Devaraj V, Ruiz Alvarado IA, Lee J-M, et al. Self-assembly of isolated plasmonic
dimers with sub-5 nm gaps on a metallic mirror. Nanoscale Horizons. 2025;10:537-548.
doi:10.1039/d4nh00546e
apa: Devaraj, V., Ruiz Alvarado, I. A., Lee, J.-M., Oh, J.-W., Gerstmann, U., Schmidt,
W. G., & Zentgraf, T. (2025). Self-assembly of isolated plasmonic dimers with
sub-5 nm gaps on a metallic mirror. Nanoscale Horizons, 10, 537–548.
https://doi.org/10.1039/d4nh00546e
bibtex: '@article{Devaraj_Ruiz Alvarado_Lee_Oh_Gerstmann_Schmidt_Zentgraf_2025,
title={Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic
mirror}, volume={10}, DOI={10.1039/d4nh00546e},
journal={Nanoscale Horizons}, publisher={Royal Society of Chemistry (RSC)}, author={Devaraj,
Vasanthan and Ruiz Alvarado, Isaac Azahel and Lee, Jong-Min and Oh, Jin-Woo and
Gerstmann, Uwe and Schmidt, Wolf Gero and Zentgraf, Thomas}, year={2025}, pages={537–548}
}'
chicago: 'Devaraj, Vasanthan, Isaac Azahel Ruiz Alvarado, Jong-Min Lee, Jin-Woo
Oh, Uwe Gerstmann, Wolf Gero Schmidt, and Thomas Zentgraf. “Self-Assembly of Isolated
Plasmonic Dimers with Sub-5 Nm Gaps on a Metallic Mirror.” Nanoscale Horizons
10 (2025): 537–48. https://doi.org/10.1039/d4nh00546e.'
ieee: 'V. Devaraj et al., “Self-assembly of isolated plasmonic dimers with
sub-5 nm gaps on a metallic mirror,” Nanoscale Horizons, vol. 10, pp. 537–548,
2025, doi: 10.1039/d4nh00546e.'
mla: Devaraj, Vasanthan, et al. “Self-Assembly of Isolated Plasmonic Dimers with
Sub-5 Nm Gaps on a Metallic Mirror.” Nanoscale Horizons, vol. 10, Royal
Society of Chemistry (RSC), 2025, pp. 537–48, doi:10.1039/d4nh00546e.
short: V. Devaraj, I.A. Ruiz Alvarado, J.-M. Lee, J.-W. Oh, U. Gerstmann, W.G. Schmidt,
T. Zentgraf, Nanoscale Horizons 10 (2025) 537–548.
date_created: 2025-02-14T08:13:10Z
date_updated: 2025-07-09T14:04:39Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
- _id: '35'
- _id: '295'
- _id: '170'
- _id: '429'
- _id: '27'
doi: 10.1039/d4nh00546e
intvolume: ' 10'
language:
- iso: eng
page: 537-548
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '168'
grant_number: '231447078'
name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
von Lithiumniobat (B07*)'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '445'
grant_number: '367360193'
name: Hochleistungsrechner Noctua in Paderborn
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Nanoscale Horizons
publication_identifier:
issn:
- 2055-6756
- 2055-6764
publication_status: published
publisher: Royal Society of Chemistry (RSC)
quality_controlled: '1'
status: public
title: Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic
mirror
type: journal_article
user_id: '16199'
volume: 10
year: '2025'
...
---
_id: '61245'
article_number: '032404'
author:
- first_name: Franziska
full_name: Barkhausen, Franziska
id: '63631'
last_name: Barkhausen
- first_name: Laura
full_name: Ares Santos, Laura
last_name: Ares Santos
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
- first_name: Jan
full_name: Sperling, Jan
id: '75127'
last_name: Sperling
orcid: 0000-0002-5844-3205
citation:
ama: 'Barkhausen F, Ares Santos L, Schumacher S, Sperling J. Entanglement between
dependent degrees of freedom: Quasiparticle correlations. Physical Review A.
2025;111(3). doi:10.1103/physreva.111.032404'
apa: 'Barkhausen, F., Ares Santos, L., Schumacher, S., & Sperling, J. (2025).
Entanglement between dependent degrees of freedom: Quasiparticle correlations.
Physical Review A, 111(3), Article 032404. https://doi.org/10.1103/physreva.111.032404'
bibtex: '@article{Barkhausen_Ares Santos_Schumacher_Sperling_2025, title={Entanglement
between dependent degrees of freedom: Quasiparticle correlations}, volume={111},
DOI={10.1103/physreva.111.032404},
number={3032404}, journal={Physical Review A}, publisher={American Physical Society
(APS)}, author={Barkhausen, Franziska and Ares Santos, Laura and Schumacher, Stefan
and Sperling, Jan}, year={2025} }'
chicago: 'Barkhausen, Franziska, Laura Ares Santos, Stefan Schumacher, and Jan Sperling.
“Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.”
Physical Review A 111, no. 3 (2025). https://doi.org/10.1103/physreva.111.032404.'
ieee: 'F. Barkhausen, L. Ares Santos, S. Schumacher, and J. Sperling, “Entanglement
between dependent degrees of freedom: Quasiparticle correlations,” Physical
Review A, vol. 111, no. 3, Art. no. 032404, 2025, doi: 10.1103/physreva.111.032404.'
mla: 'Barkhausen, Franziska, et al. “Entanglement between Dependent Degrees of Freedom:
Quasiparticle Correlations.” Physical Review A, vol. 111, no. 3, 032404,
American Physical Society (APS), 2025, doi:10.1103/physreva.111.032404.'
short: F. Barkhausen, L. Ares Santos, S. Schumacher, J. Sperling, Physical Review
A 111 (2025).
date_created: 2025-09-12T10:37:34Z
date_updated: 2025-09-12T10:42:16Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '706'
- _id: '35'
- _id: '230'
- _id: '623'
- _id: '429'
doi: 10.1103/physreva.111.032404
intvolume: ' 111'
issue: '3'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '54'
name: TRR 142 - Project Area A
- _id: '56'
name: TRR 142 - Project Area C
- _id: '61'
name: 'TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit
Polaritonen in Mikrokavitäten'
- _id: '174'
name: 'TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen
Systemen: Eine theoretische Analyse'
- _id: '266'
name: 'PhoQC: Photonisches Quantencomputing'
publication: Physical Review A
publication_identifier:
issn:
- 2469-9926
- 2469-9934
publication_status: published
publisher: American Physical Society (APS)
status: public
title: 'Entanglement between dependent degrees of freedom: Quasiparticle correlations'
type: journal_article
user_id: '16199'
volume: 111
year: '2025'
...
---
_id: '61246'
abstract:
- lang: eng
text: "Abstract\r\n The time-dependent
one-dimensional nonlinear Schrödinger equation (NLSE) is solved numerically by
a hybrid pseudospectral-variational quantum algorithm that connects a pseudospectral
step for the Hamiltonian term with a variational step for the nonlinear term.
The Hamiltonian term is treated as an integrating factor by forward and backward
Fourier transforms, which are here carried out classically. This split allows
us to avoid higher-order time integration schemes, to apply a first-order explicit
time stepping for the remaining nonlinear NLSE term in a variational algorithm
block, and thus to avoid numerical instabilities. We demonstrate that the analytical
solution is reproduced with a small root mean square error for a long time interval
over which a nonlinear soliton propagates significantly forward in space while
keeping its shape. We analyze the accuracy and complexity of the quantum algorithm,
the expressibility of the ansatz circuit and compare it with classical approaches.
Furthermore, we investigate the influence of algorithm parameters on the accuracy
of the results, including the temporal step width and the depth of the quantum
circuit."
article_number: '23478'
author:
- first_name: Nikolas
full_name: Köcher, Nikolas
id: '79191'
last_name: Köcher
- first_name: Hendrik
full_name: Rose, Hendrik
id: '55958'
last_name: Rose
orcid: 0000-0002-3079-5428
- first_name: Sachin S.
full_name: Bharadwaj, Sachin S.
last_name: Bharadwaj
- first_name: Jörg
full_name: Schumacher, Jörg
last_name: Schumacher
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Köcher N, Rose H, Bharadwaj SS, Schumacher J, Schumacher S. Numerical solution
of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum
algorithm. Scientific Reports. 2025;15(1). doi:10.1038/s41598-025-05660-3
apa: Köcher, N., Rose, H., Bharadwaj, S. S., Schumacher, J., & Schumacher, S.
(2025). Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm. Scientific Reports, 15(1), Article 23478. https://doi.org/10.1038/s41598-025-05660-3
bibtex: '@article{Köcher_Rose_Bharadwaj_Schumacher_Schumacher_2025, title={Numerical
solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm}, volume={15}, DOI={10.1038/s41598-025-05660-3},
number={123478}, journal={Scientific Reports}, publisher={Springer Science and
Business Media LLC}, author={Köcher, Nikolas and Rose, Hendrik and Bharadwaj,
Sachin S. and Schumacher, Jörg and Schumacher, Stefan}, year={2025} }'
chicago: Köcher, Nikolas, Hendrik Rose, Sachin S. Bharadwaj, Jörg Schumacher, and
Stefan Schumacher. “Numerical Solution of Nonlinear Schrödinger Equation by a
Hybrid Pseudospectral-Variational Quantum Algorithm.” Scientific Reports
15, no. 1 (2025). https://doi.org/10.1038/s41598-025-05660-3.
ieee: 'N. Köcher, H. Rose, S. S. Bharadwaj, J. Schumacher, and S. Schumacher, “Numerical
solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm,” Scientific Reports, vol. 15, no. 1, Art. no. 23478,
2025, doi: 10.1038/s41598-025-05660-3.'
mla: Köcher, Nikolas, et al. “Numerical Solution of Nonlinear Schrödinger Equation
by a Hybrid Pseudospectral-Variational Quantum Algorithm.” Scientific Reports,
vol. 15, no. 1, 23478, Springer Science and Business Media LLC, 2025, doi:10.1038/s41598-025-05660-3.
short: N. Köcher, H. Rose, S.S. Bharadwaj, J. Schumacher, S. Schumacher, Scientific
Reports 15 (2025).
date_created: 2025-09-12T10:43:29Z
date_updated: 2025-09-12T10:57:22Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
doi: 10.1038/s41598-025-05660-3
intvolume: ' 15'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '445'
name: Hochleistungsrechner Noctua in Paderborn
publication: Scientific Reports
publication_identifier:
issn:
- 2045-2322
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational
quantum algorithm
type: journal_article
user_id: '16199'
volume: 15
year: '2025'
...
---
_id: '61249'
article_number: '024029'
author:
- first_name: Qiang
full_name: Ai, Qiang
last_name: Ai
- first_name: Jan
full_name: Wingenbach, Jan
id: '69187'
last_name: Wingenbach
- first_name: Xinmiao
full_name: Yang, Xinmiao
last_name: Yang
- first_name: Jing
full_name: Wei, Jing
last_name: Wei
- first_name: Zaharias
full_name: Hatzopoulos, Zaharias
last_name: Hatzopoulos
- first_name: Pavlos G.
full_name: Savvidis, Pavlos G.
last_name: Savvidis
- 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
- first_name: Tingge
full_name: Gao, Tingge
last_name: Gao
citation:
ama: Ai Q, Wingenbach J, Yang X, et al. Optically and remotely controlling localization
of exciton-polariton condensates in a potential lattice. Physical Review Applied.
2025;23(2). doi:10.1103/physrevapplied.23.024029
apa: Ai, Q., Wingenbach, J., Yang, X., Wei, J., Hatzopoulos, Z., Savvidis, P. G.,
Schumacher, S., Ma, X., & Gao, T. (2025). Optically and remotely controlling
localization of exciton-polariton condensates in a potential lattice. Physical
Review Applied, 23(2), Article 024029. https://doi.org/10.1103/physrevapplied.23.024029
bibtex: '@article{Ai_Wingenbach_Yang_Wei_Hatzopoulos_Savvidis_Schumacher_Ma_Gao_2025,
title={Optically and remotely controlling localization of exciton-polariton condensates
in a potential lattice}, volume={23}, DOI={10.1103/physrevapplied.23.024029},
number={2024029}, journal={Physical Review Applied}, publisher={American Physical
Society (APS)}, author={Ai, Qiang and Wingenbach, Jan and Yang, Xinmiao and Wei,
Jing and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan
and Ma, Xuekai and Gao, Tingge}, year={2025} }'
chicago: Ai, Qiang, Jan Wingenbach, Xinmiao Yang, Jing Wei, Zaharias Hatzopoulos,
Pavlos G. Savvidis, Stefan Schumacher, Xuekai Ma, and Tingge Gao. “Optically and
Remotely Controlling Localization of Exciton-Polariton Condensates in a Potential
Lattice.” Physical Review Applied 23, no. 2 (2025). https://doi.org/10.1103/physrevapplied.23.024029.
ieee: 'Q. Ai et al., “Optically and remotely controlling localization of
exciton-polariton condensates in a potential lattice,” Physical Review Applied,
vol. 23, no. 2, Art. no. 024029, 2025, doi: 10.1103/physrevapplied.23.024029.'
mla: Ai, Qiang, et al. “Optically and Remotely Controlling Localization of Exciton-Polariton
Condensates in a Potential Lattice.” Physical Review Applied, vol. 23,
no. 2, 024029, American Physical Society (APS), 2025, doi:10.1103/physrevapplied.23.024029.
short: Q. Ai, J. Wingenbach, X. Yang, J. Wei, Z. Hatzopoulos, P.G. Savvidis, S.
Schumacher, X. Ma, T. Gao, Physical Review Applied 23 (2025).
date_created: 2025-09-12T11:01:17Z
date_updated: 2025-09-12T11:02:33Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '230'
- _id: '35'
- _id: '27'
doi: 10.1103/physrevapplied.23.024029
intvolume: ' 23'
issue: '2'
language:
- iso: eng
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Physical Review Applied
publication_identifier:
issn:
- 2331-7019
publication_status: published
publisher: American Physical Society (APS)
status: public
title: Optically and remotely controlling localization of exciton-polariton condensates
in a potential lattice
type: journal_article
user_id: '16199'
volume: 23
year: '2025'
...
---
_id: '61351'
abstract:
- lang: eng
text: AbstractThe interaction of water molecules
with semiconductor surfaces is relevant to various optoelectronic phenomena and
physicochemical processes. Despite advances in fundamental understanding of water‐exposed
surfaces, the detailed time‐ and energy‐resolved behavior of excited electrons
remains largely unexplored. Here, the effects of water exposure on the near‐surface
electron dynamics of phosphorus‐terminated p(2×2)/c(4×2)‐reconstructed indium
phosphide (100) (P‐rich InP) are studied experimentally and matched to theoretical
calculations. The P‐rich InP surface, consisting of H‐passivated P‐dimers, serves
as a model for other P‐containing III‐V semiconductors such as gallium phosphide
(GaP) or aluminum indium phosphide (AlInP). Electron dynamics near the surface
are probed with femtosecond resolution using time‐resolved two‐photon photoemission
(tr‐2PPE), a pump‐probe spectroscopic technique. Pulsed water exposure preserves
electronic states and significantly increases lifetimes at the conduction band
minimum (CBM). Density‐functional theory (DFT) calculations attribute these findings
to suppression of surface vibrational modes in the top P‐layer by water exposure,
reducing electronic transition probabilities of near‐band‐gap surface states.
The results suggest that many near‐surface state lifetimes reported in ultra‐high
vacuum may change significantly upon electrolyte exposure. These states may thus
contribute more strongly to surface reactions than traditionally assumed. Demonstrating
this effect for the technologically relevant P‐rich InP surface opens new opportunities
in this underexplored area of surface electrochemistry.
article_number: e00463
author:
- first_name: Jonathan
full_name: Diederich, Jonathan
last_name: Diederich
- first_name: Agnieszka
full_name: Paszuk, Agnieszka
last_name: Paszuk
- first_name: Isaac Azahel
full_name: Ruiz Alvarado, Isaac Azahel
id: '79462'
last_name: Ruiz Alvarado
orcid: 0000-0002-4710-1170
- first_name: Marvin
full_name: Krenz, Marvin
last_name: Krenz
- first_name: Mohammad Amin
full_name: Zare Pour, Mohammad Amin
last_name: Zare Pour
- first_name: Diwakar Suresh
full_name: Babu, Diwakar Suresh
last_name: Babu
- first_name: Jennifer
full_name: Velazquez Rojas, Jennifer
last_name: Velazquez Rojas
- first_name: Christian
full_name: Höhn, Christian
last_name: Höhn
- first_name: Yuying
full_name: Gao, Yuying
last_name: Gao
- first_name: Klaus
full_name: Schwarzburg, Klaus
last_name: Schwarzburg
- first_name: David
full_name: Ostheimer, David
last_name: Ostheimer
- first_name: Rainer
full_name: Eichberger, Rainer
last_name: Eichberger
- first_name: Wolf Gero
full_name: Schmidt, Wolf Gero
id: '468'
last_name: Schmidt
orcid: 0000-0002-2717-5076
- first_name: Thomas
full_name: Hannappel, Thomas
last_name: Hannappel
- first_name: Roel van
full_name: de Krol, Roel van
last_name: de Krol
- first_name: Dennis
full_name: Friedrich, Dennis
last_name: Friedrich
citation:
ama: Diederich J, Paszuk A, Ruiz Alvarado IA, et al. Ultrafast Electron Dynamics
at the Water‐Modified InP(100) Surface. Advanced Materials Interfaces.
2025;12(16). doi:10.1002/admi.202500463
apa: Diederich, J., Paszuk, A., Ruiz Alvarado, I. A., Krenz, M., Zare Pour, M. A.,
Babu, D. S., Velazquez Rojas, J., Höhn, C., Gao, Y., Schwarzburg, K., Ostheimer,
D., Eichberger, R., Schmidt, W. G., Hannappel, T., de Krol, R. van, & Friedrich,
D. (2025). Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface.
Advanced Materials Interfaces, 12(16), Article e00463. https://doi.org/10.1002/admi.202500463
bibtex: '@article{Diederich_Paszuk_Ruiz Alvarado_Krenz_Zare Pour_Babu_Velazquez
Rojas_Höhn_Gao_Schwarzburg_et al._2025, title={Ultrafast Electron Dynamics at
the Water‐Modified InP(100) Surface}, volume={12}, DOI={10.1002/admi.202500463},
number={16e00463}, journal={Advanced Materials Interfaces}, publisher={Wiley},
author={Diederich, Jonathan and Paszuk, Agnieszka and Ruiz Alvarado, Isaac Azahel
and Krenz, Marvin and Zare Pour, Mohammad Amin and Babu, Diwakar Suresh and Velazquez
Rojas, Jennifer and Höhn, Christian and Gao, Yuying and Schwarzburg, Klaus and
et al.}, year={2025} }'
chicago: Diederich, Jonathan, Agnieszka Paszuk, Isaac Azahel Ruiz Alvarado, Marvin
Krenz, Mohammad Amin Zare Pour, Diwakar Suresh Babu, Jennifer Velazquez Rojas,
et al. “Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface.” Advanced
Materials Interfaces 12, no. 16 (2025). https://doi.org/10.1002/admi.202500463.
ieee: 'J. Diederich et al., “Ultrafast Electron Dynamics at the Water‐Modified
InP(100) Surface,” Advanced Materials Interfaces, vol. 12, no. 16, Art.
no. e00463, 2025, doi: 10.1002/admi.202500463.'
mla: Diederich, Jonathan, et al. “Ultrafast Electron Dynamics at the Water‐Modified
InP(100) Surface.” Advanced Materials Interfaces, vol. 12, no. 16, e00463,
Wiley, 2025, doi:10.1002/admi.202500463.
short: J. Diederich, A. Paszuk, I.A. Ruiz Alvarado, M. Krenz, M.A. Zare Pour, D.S.
Babu, J. Velazquez Rojas, C. Höhn, Y. Gao, K. Schwarzburg, D. Ostheimer, R. Eichberger,
W.G. Schmidt, T. Hannappel, R. van de Krol, D. Friedrich, Advanced Materials Interfaces
12 (2025).
date_created: 2025-09-18T11:03:16Z
date_updated: 2025-09-18T11:06:59Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
doi: 10.1002/admi.202500463
intvolume: ' 12'
issue: '16'
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
- _id: '55'
name: TRR 142 - Project Area B
- _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: Advanced Materials Interfaces
publication_identifier:
issn:
- 2196-7350
- 2196-7350
publication_status: published
publisher: Wiley
status: public
title: Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface
type: journal_article
user_id: '16199'
volume: 12
year: '2025'
...
---
_id: '61356'
abstract:
- lang: eng
text: First-principles calculations reveal how topological defects in semiconducting
carbon nanotubes trap triplet excitons and enable single-photon emission at telecom
wavelengths, offering new insights into their potential for photonic devices.
author:
- first_name: Timur
full_name: Biktagirov, Timur
id: '65612'
last_name: Biktagirov
- 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: Biktagirov T, Gerstmann U, Schmidt WG. Topological defects in semiconducting
carbon nanotubes as triplet exciton traps and single-photon emitters. Nanoscale.
2025;17(11):6884-6891. doi:10.1039/d4nr03904a
apa: Biktagirov, T., Gerstmann, U., & Schmidt, W. G. (2025). Topological defects
in semiconducting carbon nanotubes as triplet exciton traps and single-photon
emitters. Nanoscale, 17(11), 6884–6891. https://doi.org/10.1039/d4nr03904a
bibtex: '@article{Biktagirov_Gerstmann_Schmidt_2025, title={Topological defects
in semiconducting carbon nanotubes as triplet exciton traps and single-photon
emitters}, volume={17}, DOI={10.1039/d4nr03904a},
number={11}, journal={Nanoscale}, publisher={Royal Society of Chemistry (RSC)},
author={Biktagirov, Timur and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2025},
pages={6884–6891} }'
chicago: 'Biktagirov, Timur, Uwe Gerstmann, and Wolf Gero Schmidt. “Topological
Defects in Semiconducting Carbon Nanotubes as Triplet Exciton Traps and Single-Photon
Emitters.” Nanoscale 17, no. 11 (2025): 6884–91. https://doi.org/10.1039/d4nr03904a.'
ieee: 'T. Biktagirov, U. Gerstmann, and W. G. Schmidt, “Topological defects in semiconducting
carbon nanotubes as triplet exciton traps and single-photon emitters,” Nanoscale,
vol. 17, no. 11, pp. 6884–6891, 2025, doi: 10.1039/d4nr03904a.'
mla: Biktagirov, Timur, et al. “Topological Defects in Semiconducting Carbon Nanotubes
as Triplet Exciton Traps and Single-Photon Emitters.” Nanoscale, vol. 17,
no. 11, Royal Society of Chemistry (RSC), 2025, pp. 6884–91, doi:10.1039/d4nr03904a.
short: T. Biktagirov, U. Gerstmann, W.G. Schmidt, Nanoscale 17 (2025) 6884–6891.
date_created: 2025-09-18T11:23:25Z
date_updated: 2025-09-18T11:26:23Z
department:
- _id: '15'
- _id: '170'
- _id: '295'
- _id: '790'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
doi: 10.1039/d4nr03904a
intvolume: ' 17'
issue: '11'
language:
- iso: eng
page: 6884-6891
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: '168'
name: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat
(B07*)
- _id: '166'
name: TRR 142 - Subproject A11
publication: Nanoscale
publication_identifier:
issn:
- 2040-3364
- 2040-3372
publication_status: published
publisher: Royal Society of Chemistry (RSC)
status: public
title: Topological defects in semiconducting carbon nanotubes as triplet exciton traps
and single-photon emitters
type: journal_article
user_id: '16199'
volume: 17
year: '2025'
...
---
_id: '58519'
abstract:
- lang: eng
text: A unified theoretical approach to describe the properties of multimode
squeezed light generated in a lossy medium is presented. This approach is valid
for Markovian environments and includes both a model of discrete losses based
on the beamsplitter approach and a generalized continuous loss model based on
the spatial Langevin equation. For an important class of Gaussian states, we derive
master equations for the second-order correlation functions and illustrate their
solution for both frequency-independent and frequency-dependent losses. Studying
the mode structure, we demonstrate that in a lossy environment no broadband basis
without quadrature correlations between the different broadband modes exists.
Therefore, various techniques and strategies to introduce broadband modes can
be considered. We show that the Mercer expansion and the Williamson-Euler decomposition
do not provide modes in which the maximal squeezing contained in the system can
be measured. In turn, we find a new broadband basis that maximizes squeezing in
the lossy system and present an algorithm to construct it.
article_number: '1621'
author:
- first_name: Denis A.
full_name: Kopylov, Denis A.
last_name: Kopylov
- first_name: Torsten
full_name: Meier, Torsten
id: '344'
last_name: Meier
orcid: 0000-0001-8864-2072
- first_name: Polina R.
full_name: Sharapova, Polina R.
id: '60286'
last_name: Sharapova
citation:
ama: Kopylov DA, Meier T, Sharapova PR. Theory of Multimode Squeezed Light Generation
in Lossy Media. Quantum. 2025;9. doi:10.22331/q-2025-02-04-1621
apa: Kopylov, D. A., Meier, T., & Sharapova, P. R. (2025). Theory of Multimode
Squeezed Light Generation in Lossy Media. Quantum, 9, Article 1621.
https://doi.org/10.22331/q-2025-02-04-1621
bibtex: '@article{Kopylov_Meier_Sharapova_2025, title={Theory of Multimode Squeezed
Light Generation in Lossy Media}, volume={9}, DOI={10.22331/q-2025-02-04-1621},
number={1621}, journal={Quantum}, publisher={Verein zur Forderung des Open Access
Publizierens in den Quantenwissenschaften}, author={Kopylov, Denis A. and Meier,
Torsten and Sharapova, Polina R.}, year={2025} }'
chicago: Kopylov, Denis A., Torsten Meier, and Polina R. Sharapova. “Theory of Multimode
Squeezed Light Generation in Lossy Media.” Quantum 9 (2025). https://doi.org/10.22331/q-2025-02-04-1621.
ieee: 'D. A. Kopylov, T. Meier, and P. R. Sharapova, “Theory of Multimode Squeezed
Light Generation in Lossy Media,” Quantum, vol. 9, Art. no. 1621, 2025,
doi: 10.22331/q-2025-02-04-1621.'
mla: Kopylov, Denis A., et al. “Theory of Multimode Squeezed Light Generation in
Lossy Media.” Quantum, vol. 9, 1621, Verein zur Forderung des Open Access
Publizierens in den Quantenwissenschaften, 2025, doi:10.22331/q-2025-02-04-1621.
short: D.A. Kopylov, T. Meier, P.R. Sharapova, Quantum 9 (2025).
date_created: 2025-02-05T12:57:37Z
date_updated: 2025-09-18T13:22:26Z
department:
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '623'
- _id: '27'
doi: 10.22331/q-2025-02-04-1621
intvolume: ' 9'
language:
- iso: eng
project:
- _id: '266'
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Quantum
publication_identifier:
issn:
- 2521-327X
publication_status: published
publisher: Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
status: public
title: Theory of Multimode Squeezed Light Generation in Lossy Media
type: journal_article
user_id: '16199'
volume: 9
year: '2025'
...
---
_id: '60891'
abstract:
- lang: eng
text: Straight dielectric waveguide channels made from slabs of thin-film lithium
niobate (TFLN), or lithium niobate on insulator (LNOI), are investigated in the
linear regime, for channels of rib and strip type with common trapezoidal cross
sections, in Z-cut and X-cut samples at varying on-chip orientation. We clarify
the theoretical basis for the waveguides with potentially non-diagonal core permittivity.
Symmetry classes can be distinguished that differ in their consequences for potential
modal degeneracy and polarization conversion. Our rigorous numerical analysis
by means of a finite-element solver takes the anisotropy of the lithium niobate
cores rigorously into account. We discuss extensive data for effective indices,
polarization properties, and hybridization of guided modes, in single- and multimode
channels. Scans over the waveguide width and orientation as primary parameters
are complemented by a series of illustrations of vectorial mode profiles. These
turn out to be essentially complex in cases of X-cut channels at non-crystal-axis-aligned
orientations.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Shahriar
full_name: Khan, Shahriar
last_name: Khan
- first_name: Behnood
full_name: Taheri, Behnood
last_name: Taheri
- 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, Khan S, Taheri B, Farheen H, Förstner J. TFLN channel waveguides
of rib and strip type: Properties of guided modes. Optics Continuum. 2025;4(10):2356.
doi:10.1364/optcon.569959'
apa: 'Hammer, M., Khan, S., Taheri, B., Farheen, H., & Förstner, J. (2025).
TFLN channel waveguides of rib and strip type: Properties of guided modes. Optics
Continuum, 4(10), 2356. https://doi.org/10.1364/optcon.569959'
bibtex: '@article{Hammer_Khan_Taheri_Farheen_Förstner_2025, title={TFLN channel
waveguides of rib and strip type: Properties of guided modes}, volume={4}, DOI={10.1364/optcon.569959}, number={10},
journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer,
Manfred and Khan, Shahriar and Taheri, Behnood and Farheen, Henna and Förstner,
Jens}, year={2025}, pages={2356} }'
chicago: 'Hammer, Manfred, Shahriar Khan, Behnood Taheri, Henna Farheen, and Jens
Förstner. “TFLN Channel Waveguides of Rib and Strip Type: Properties of Guided
Modes.” Optics Continuum 4, no. 10 (2025): 2356. https://doi.org/10.1364/optcon.569959.'
ieee: 'M. Hammer, S. Khan, B. Taheri, H. Farheen, and J. Förstner, “TFLN channel
waveguides of rib and strip type: Properties of guided modes,” Optics Continuum,
vol. 4, no. 10, p. 2356, 2025, doi: 10.1364/optcon.569959.'
mla: 'Hammer, Manfred, et al. “TFLN Channel Waveguides of Rib and Strip Type: Properties
of Guided Modes.” Optics Continuum, vol. 4, no. 10, Optica Publishing Group,
2025, p. 2356, doi:10.1364/optcon.569959.'
short: M. Hammer, S. Khan, B. Taheri, H. Farheen, J. Förstner, Optics Continuum
4 (2025) 2356.
date_created: 2025-08-06T09:36:30Z
date_updated: 2025-10-05T11:52:55Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '623'
doi: 10.1364/optcon.569959
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2025-10-05T11:48:25Z
date_updated: 2025-10-05T11:48:25Z
file_id: '61516'
file_name: 2025-08 Hammer - Optics Continuum - TFLN channel waveguides of rib and
strip type. Properties of guided modes (official version).pdf
file_size: 5417636
relation: main_file
success: 1
file_date_updated: 2025-10-05T11:48:25Z
has_accepted_license: '1'
intvolume: ' 4'
issue: '10'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: '2356'
publication: Optics Continuum
publication_identifier:
issn:
- 2770-0208
publication_status: published
publisher: Optica Publishing Group
status: public
title: 'TFLN channel waveguides of rib and strip type: Properties of guided modes'
type: journal_article
user_id: '158'
volume: 4
year: '2025'
...