---
_id: '64662'
abstract:
- lang: eng
text: "\r\n In this study, we investigate the impact
of chromium-induced point defects on the nonlinear optical properties and electric-field-induced
second harmonic generation (EFISH) in rutile titanium dioxide (TiO\r\n 2\r\n
\ ). Chromium thin films were deposited by electron beam evaporation
on (001)-oriented bulk TiO\r\n 2\r\n substrates
and subsequently diffused into the lattice in a tube furnace under a nitrogen
atmosphere at 900 °C. The introduction of chromium significantly enhanced the
third harmonic generation (THG) of a 1560 nm laser, with an amplification factor
of up to 8.3, indicative of an enhanced third-order nonlinear susceptibility,\r\n
\ χ\r\n (3)\r\n
\ . Moreover, the application of an external voltage induced
a pronounced EFISH signal in the chromium-doped samples, further confirming the
enhanced nonlinear response. These results demonstrate that defect engineering
via chromium doping in rutile TiO\r\n 2\r\n
\ offers a promising pathway for the development of high-performance
nonlinear optical devices.\r\n "
article_number: '54320'
author:
- first_name: Marius
full_name: Brinkmann, Marius
last_name: Brinkmann
- first_name: Falco
full_name: Meier, Falco
last_name: Meier
- first_name: Vladimir
full_name: Spedt, Vladimir
last_name: Spedt
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
citation:
ama: Brinkmann M, Meier F, Spedt V, Meier C. Boosting third-order nonlinearities
in rutile TiO2 by chromium doping. Optics Express. 2025;33(26).
doi:10.1364/oe.572063
apa: Brinkmann, M., Meier, F., Spedt, V., & Meier, C. (2025). Boosting third-order
nonlinearities in rutile TiO2 by chromium doping. Optics Express,
33(26), Article 54320. https://doi.org/10.1364/oe.572063
bibtex: '@article{Brinkmann_Meier_Spedt_Meier_2025, title={Boosting third-order
nonlinearities in rutile TiO2 by chromium doping}, volume={33}, DOI={10.1364/oe.572063}, number={2654320},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Brinkmann,
Marius and Meier, Falco and Spedt, Vladimir and Meier, Cedrik}, year={2025} }'
chicago: Brinkmann, Marius, Falco Meier, Vladimir Spedt, and Cedrik Meier. “Boosting
Third-Order Nonlinearities in Rutile TiO2 by Chromium Doping.” Optics
Express 33, no. 26 (2025). https://doi.org/10.1364/oe.572063.
ieee: 'M. Brinkmann, F. Meier, V. Spedt, and C. Meier, “Boosting third-order nonlinearities
in rutile TiO2 by chromium doping,” Optics Express, vol. 33,
no. 26, Art. no. 54320, 2025, doi: 10.1364/oe.572063.'
mla: Brinkmann, Marius, et al. “Boosting Third-Order Nonlinearities in Rutile TiO2
by Chromium Doping.” Optics Express, vol. 33, no. 26, 54320, Optica Publishing
Group, 2025, doi:10.1364/oe.572063.
short: M. Brinkmann, F. Meier, V. Spedt, C. Meier, Optics Express 33 (2025).
date_created: 2026-02-26T09:43:53Z
date_updated: 2026-02-26T09:44:49Z
department:
- _id: '15'
doi: 10.1364/oe.572063
intvolume: ' 33'
issue: '26'
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Boosting third-order nonlinearities in rutile TiO2 by chromium doping
type: journal_article
user_id: '20798'
volume: 33
year: '2025'
...
---
_id: '62286'
abstract:
- lang: eng
text: Optical tweezer arrays of laser-cooled and individually controlled particles
have revolutionized atomic, molecular, and optical physics. They afford exquisite
capabilities for applications in quantum simulation of many-body physics, quantum
computation, and sensing. Underlying this development is the technical maturity
of generating scalable optical beams, enabled by active components and a high
numerical aperture objective. However, such a complex combination of bulk optics
outside the vacuum chamber is very sensitive to any vibration and drift. Here,
we demonstrate the generation of a 3 × 3 static tweezer array with a single chip-scale
multifunctional metasurface element in vacuum, replacing the meter-long free space
optics. Fluorescence counts on the camera validate the successful trapping of
the atomic ensemble array and showcase a promising strategy for integrated photonics
with cold atom systems. The introduction of a polarization independent dual-wavelength
metasurface significantly enhances fluorescence collection efficiency while reducing
experimental complexity. This approach paves the way for scalable neutral atom
platforms and offers a compelling route towards the realization of next generation
quantum metasurfaces.
article_number: '51085'
article_type: original
author:
- first_name: Donghao
full_name: Li, Donghao
last_name: Li
- first_name: Qiming
full_name: Liao, Qiming
last_name: Liao
- first_name: Beining
full_name: Xu, Beining
last_name: Xu
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Emmanuel
full_name: Narvaez Castaneda, Emmanuel
last_name: Narvaez Castaneda
- first_name: Yaoting
full_name: Zhou, Yaoting
last_name: Zhou
- first_name: Keyu
full_name: Qin, Keyu
last_name: Qin
- first_name: Zhongxiao
full_name: Xu, Zhongxiao
last_name: Xu
- first_name: Heng
full_name: Shen, Heng
last_name: Shen
- first_name: Lingling
full_name: Huang, Lingling
last_name: Huang
citation:
ama: Li D, Liao Q, Xu B, et al. In vacuum metasurface for optical microtrap array.
Optics Express. 2025;33(24). doi:10.1364/oe.580201
apa: Li, D., Liao, Q., Xu, B., Zentgraf, T., Narvaez Castaneda, E., Zhou, Y., Qin,
K., Xu, Z., Shen, H., & Huang, L. (2025). In vacuum metasurface for optical
microtrap array. Optics Express, 33(24), Article 51085. https://doi.org/10.1364/oe.580201
bibtex: '@article{Li_Liao_Xu_Zentgraf_Narvaez Castaneda_Zhou_Qin_Xu_Shen_Huang_2025,
title={In vacuum metasurface for optical microtrap array}, volume={33}, DOI={10.1364/oe.580201}, number={2451085},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Li, Donghao
and Liao, Qiming and Xu, Beining and Zentgraf, Thomas and Narvaez Castaneda, Emmanuel
and Zhou, Yaoting and Qin, Keyu and Xu, Zhongxiao and Shen, Heng and Huang, Lingling},
year={2025} }'
chicago: Li, Donghao, Qiming Liao, Beining Xu, Thomas Zentgraf, Emmanuel Narvaez
Castaneda, Yaoting Zhou, Keyu Qin, Zhongxiao Xu, Heng Shen, and Lingling Huang.
“In Vacuum Metasurface for Optical Microtrap Array.” Optics Express 33,
no. 24 (2025). https://doi.org/10.1364/oe.580201.
ieee: 'D. Li et al., “In vacuum metasurface for optical microtrap array,”
Optics Express, vol. 33, no. 24, Art. no. 51085, 2025, doi: 10.1364/oe.580201.'
mla: Li, Donghao, et al. “In Vacuum Metasurface for Optical Microtrap Array.” Optics
Express, vol. 33, no. 24, 51085, Optica Publishing Group, 2025, doi:10.1364/oe.580201.
short: D. Li, Q. Liao, B. Xu, T. Zentgraf, E. Narvaez Castaneda, Y. Zhou, K. Qin,
Z. Xu, H. Shen, L. Huang, Optics Express 33 (2025).
date_created: 2025-11-24T06:31:17Z
date_updated: 2025-11-24T06:35:19Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1364/oe.580201
intvolume: ' 33'
issue: '24'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-24-51085
oa: '1'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: In vacuum metasurface for optical microtrap array
type: journal_article
user_id: '30525'
volume: 33
year: '2025'
...
---
_id: '62269'
abstract:
- lang: eng
text: The titanium in-diffused lithium niobate waveguide platform is well-established
for reliable prototyping and packaging of many quantum photonic components at
room temperature. Nevertheless, compatibility with certain quantum light sources
and superconducting detectors requires operation under cryogenic conditions. We
characterize alterations in phase-matching and mode guiding of a non-degenerate
spontaneous parametric down-conversion process emitting around 1556 nm and 950 nm,
under cryogenic conditions. Despite the effects of pyroelectricity and photorefraction,
the spectral properties match our theoretical model. Nevertheless, these effects
cause small but significant variations within and between cooling cycles. These
measurements provide a first benchmark against which other nonlinear photonic
integration platforms, such as thin-film lithium niobate, can be compared.
article_number: '50451'
article_type: original
author:
- first_name: Nina Amelie
full_name: Lange, Nina Amelie
id: '56843'
last_name: Lange
orcid: 0000-0001-6624-7098
- first_name: Sebastian
full_name: Lengeling, Sebastian
id: '44373'
last_name: Lengeling
- first_name: Philipp
full_name: Mues, Philipp
id: '49772'
last_name: Mues
orcid: 0000-0003-0643-7636
- first_name: Viktor
full_name: Quiring, Viktor
last_name: Quiring
- first_name: Werner
full_name: Ridder, Werner
id: '63574'
last_name: Ridder
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Tim
full_name: Bartley, Tim
id: '49683'
last_name: Bartley
citation:
ama: Lange NA, Lengeling S, Mues P, et al. Widely non-degenerate nonlinear frequency
conversion in cryogenic titanium in-diffused lithium niobate waveguides. Optics
Express. 2025;33(24). doi:10.1364/oe.578108
apa: Lange, N. A., Lengeling, S., Mues, P., Quiring, V., Ridder, W., Eigner, C.,
Herrmann, H., Silberhorn, C., & Bartley, T. (2025). Widely non-degenerate
nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate
waveguides. Optics Express, 33(24), Article 50451. https://doi.org/10.1364/oe.578108
bibtex: '@article{Lange_Lengeling_Mues_Quiring_Ridder_Eigner_Herrmann_Silberhorn_Bartley_2025,
title={Widely non-degenerate nonlinear frequency conversion in cryogenic titanium
in-diffused lithium niobate waveguides}, volume={33}, DOI={10.1364/oe.578108},
number={2450451}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Lange, Nina Amelie and Lengeling, Sebastian and Mues, Philipp and Quiring,
Viktor and Ridder, Werner and Eigner, Christof and Herrmann, Harald and Silberhorn,
Christine and Bartley, Tim}, year={2025} }'
chicago: Lange, Nina Amelie, Sebastian Lengeling, Philipp Mues, Viktor Quiring,
Werner Ridder, Christof Eigner, Harald Herrmann, Christine Silberhorn, and Tim
Bartley. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium
in-Diffused Lithium Niobate Waveguides.” Optics Express 33, no. 24 (2025).
https://doi.org/10.1364/oe.578108.
ieee: 'N. A. Lange et al., “Widely non-degenerate nonlinear frequency conversion
in cryogenic titanium in-diffused lithium niobate waveguides,” Optics Express,
vol. 33, no. 24, Art. no. 50451, 2025, doi: 10.1364/oe.578108.'
mla: Lange, Nina Amelie, et al. “Widely Non-Degenerate Nonlinear Frequency Conversion
in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” Optics Express,
vol. 33, no. 24, 50451, Optica Publishing Group, 2025, doi:10.1364/oe.578108.
short: N.A. Lange, S. Lengeling, P. Mues, V. Quiring, W. Ridder, C. Eigner, H. Herrmann,
C. Silberhorn, T. Bartley, Optics Express 33 (2025).
date_created: 2025-11-20T10:35:35Z
date_updated: 2025-12-12T12:13:45Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1364/oe.578108
intvolume: ' 33'
issue: '24'
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
project:
- _id: '171'
name: 'TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher
Filterung unter Verwendung integrierter supraleitender Detektoren'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Widely non-degenerate nonlinear frequency conversion in cryogenic titanium
in-diffused lithium niobate waveguides
type: journal_article
user_id: '49683'
volume: 33
year: '2025'
...
---
_id: '63091'
abstract:
- lang: eng
text: We present the design and characterization of a guided-wave, bright, and highly
frequency non-degenerate parametric down-conversion (PDC) source in thin-film
lithium niobate. The source generates photon pairs with wavelengths of 815 nm
and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths.
We confirm the high quality of the generated single photons by determining a value
for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3).
Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which
is two orders of magnitude higher than sources based on weakly guiding waveguides.
The shape of the PDC spectrum and the strong agreement between the effective and
nominal bandwidth highlight our high fabrication quality of periodically poled
waveguides. The good agreement between the measured and simulated spectral characteristics
of our source demonstrates our excellent understanding of the PDC process. Our
result is a valuable step towards practical and scalable quantum communication
networks as well as photonic quantum computing.
article_number: '52729'
article_type: original
author:
- first_name: Silia
full_name: Babel, Silia
id: '63231'
last_name: Babel
orcid: https://orcid.org/0000-0002-1568-2580
- first_name: Laura
full_name: Bollmers, Laura
id: '61375'
last_name: Bollmers
- first_name: Franz
full_name: Roeder, Franz
id: '88149'
last_name: Roeder
- first_name: Werner
full_name: Ridder, Werner
id: '63574'
last_name: Ridder
- first_name: Christian
full_name: Golla, Christian
id: '40420'
last_name: Golla
- first_name: Ronja
full_name: Köthemann, Ronja
last_name: Köthemann
- first_name: Bernhard
full_name: Reineke, Bernhard
id: '29821'
last_name: Reineke
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source
based on thin-film lithium niobate for bridging visible and telecom wavelengths.
Optics Express. 2025;33(25). doi:10.1364/oe.571605
apa: Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R.,
Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., & Silberhorn,
C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium
niobate for bridging visible and telecom wavelengths. Optics Express, 33(25),
Article 52729. https://doi.org/10.1364/oe.571605
bibtex: '@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et
al._2025, title={Ultrabright, two-color photon pair source based on thin-film
lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={10.1364/oe.571605}, number={2552729},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel,
Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian
and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin
and Eigner, Christof and et al.}, year={2025} }'
chicago: Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla,
Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair
Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.”
Optics Express 33, no. 25 (2025). https://doi.org/10.1364/oe.571605.
ieee: 'S. Babel et al., “Ultrabright, two-color photon pair source based
on thin-film lithium niobate for bridging visible and telecom wavelengths,” Optics
Express, vol. 33, no. 25, Art. no. 52729, 2025, doi: 10.1364/oe.571605.'
mla: Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film
Lithium Niobate for Bridging Visible and Telecom Wavelengths.” Optics Express,
vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:10.1364/oe.571605.
short: S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke,
H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33
(2025).
date_created: 2025-12-15T07:20:36Z
date_updated: 2026-01-07T11:28:35Z
department:
- _id: '288'
- _id: '623'
doi: 10.1364/oe.571605
intvolume: ' 33'
issue: '25'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729
oa: '1'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Ultrabright, two-color photon pair source based on thin-film lithium niobate
for bridging visible and telecom wavelengths
type: journal_article
user_id: '63231'
volume: 33
year: '2025'
...
---
_id: '51339'
author:
- first_name: Jonas
full_name: Babai-Hemati, Jonas
last_name: Babai-Hemati
- first_name: Felix
full_name: vom Bruch, Felix
id: '71245'
last_name: vom Bruch
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Babai-Hemati J, vom Bruch F, Herrmann H, Silberhorn C. Tailored second harmonic
generation inTi-diffused PPLN waveguides usingmicro-heaters. Optics Express.
Published online 2024. doi:10.1364/oe.510319
apa: Babai-Hemati, J., vom Bruch, F., Herrmann, H., & Silberhorn, C. (2024).
Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters.
Optics Express. https://doi.org/10.1364/oe.510319
bibtex: '@article{Babai-Hemati_vom Bruch_Herrmann_Silberhorn_2024, title={Tailored
second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters},
DOI={10.1364/oe.510319}, journal={Optics
Express}, publisher={Optica Publishing Group}, author={Babai-Hemati, Jonas and
vom Bruch, Felix and Herrmann, Harald and Silberhorn, Christine}, year={2024}
}'
chicago: Babai-Hemati, Jonas, Felix vom Bruch, Harald Herrmann, and Christine Silberhorn.
“Tailored Second Harmonic Generation InTi-Diffused PPLN Waveguides Usingmicro-Heaters.”
Optics Express, 2024. https://doi.org/10.1364/oe.510319.
ieee: 'J. Babai-Hemati, F. vom Bruch, H. Herrmann, and C. Silberhorn, “Tailored
second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters,”
Optics Express, 2024, doi: 10.1364/oe.510319.'
mla: Babai-Hemati, Jonas, et al. “Tailored Second Harmonic Generation InTi-Diffused
PPLN Waveguides Usingmicro-Heaters.” Optics Express, Optica Publishing
Group, 2024, doi:10.1364/oe.510319.
short: J. Babai-Hemati, F. vom Bruch, H. Herrmann, C. Silberhorn, Optics Express
(2024).
date_created: 2024-02-13T13:03:01Z
date_updated: 2024-02-13T13:09:51Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1364/oe.510319
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters
type: journal_article
user_id: '216'
year: '2024'
...
---
_id: '55264'
abstract:
- lang: eng
text: Tunneling ionization is a crucial process in the interaction between
strong laser fields and matter which initiates numerous nonlinear phenomena including
high-order harmonic generation, photoelectron holography, etc. Both adiabatic
and nonadiabatic tunneling ionization are well understood in atomic systems. However,
the tunneling dynamics in solids, especially nonadiabatic tunneling, has not yet
been fully understood. Here, we study the sub-cycle resolved strong-field tunneling
dynamics in solids via a complex saddle-point method. We compare the instantaneous
momentum at the moment of tunneling and the tunneling distances over a range of
Keldysh parameters. Our results demonstrate that for nonadiabatic tunneling, tunneling
ionization away from Γ point is possible. When this happens the electron has a
nonzero initial velocity when it emerges in the conduction band. Moreover, consistent
with atomic tunneling, a reduced tunneling distance as compared to the quasi-static
case is found. Our results provide remarkable insight into the basic physics governing
the sub-cycle electron tunneling dynamics with significant implications for understanding
subsequent strong-field nonlinear phenomena in solids.
article_number: '15862'
author:
- first_name: Shidong
full_name: Yang, Shidong
last_name: Yang
- first_name: Xiwang
full_name: Liu, Xiwang
last_name: Liu
- first_name: Hongdan
full_name: Zhang, Hongdan
last_name: Zhang
- first_name: Xiaohong
full_name: Song, Xiaohong
last_name: Song
- first_name: Ruixin
full_name: Zuo, Ruixin
last_name: Zuo
- 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: Yang S, Liu X, Zhang H, et al. Sub-cycle strong-field tunneling dynamics in
solids. Optics Express. 2024;32(9). doi:10.1364/oe.521207
apa: Yang, S., Liu, X., Zhang, H., Song, X., Zuo, R., Meier, T., & Yang, W.
(2024). Sub-cycle strong-field tunneling dynamics in solids. Optics Express,
32(9), Article 15862. https://doi.org/10.1364/oe.521207
bibtex: '@article{Yang_Liu_Zhang_Song_Zuo_Meier_Yang_2024, title={Sub-cycle strong-field
tunneling dynamics in solids}, volume={32}, DOI={10.1364/oe.521207},
number={915862}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Yang, Shidong and Liu, Xiwang and Zhang, Hongdan and Song, Xiaohong and
Zuo, Ruixin and Meier, Torsten and Yang, Weifeng}, year={2024} }'
chicago: Yang, Shidong, Xiwang Liu, Hongdan Zhang, Xiaohong Song, Ruixin Zuo, Torsten
Meier, and Weifeng Yang. “Sub-Cycle Strong-Field Tunneling Dynamics in Solids.”
Optics Express 32, no. 9 (2024). https://doi.org/10.1364/oe.521207.
ieee: 'S. Yang et al., “Sub-cycle strong-field tunneling dynamics in solids,”
Optics Express, vol. 32, no. 9, Art. no. 15862, 2024, doi: 10.1364/oe.521207.'
mla: Yang, Shidong, et al. “Sub-Cycle Strong-Field Tunneling Dynamics in Solids.”
Optics Express, vol. 32, no. 9, 15862, Optica Publishing Group, 2024, doi:10.1364/oe.521207.
short: S. Yang, X. Liu, H. Zhang, X. Song, R. Zuo, T. Meier, W. Yang, Optics Express
32 (2024).
date_created: 2024-07-15T09:25:30Z
date_updated: 2024-07-15T09:29:23Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '230'
- _id: '35'
doi: 10.1364/oe.521207
intvolume: ' 32'
issue: '9'
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Sub-cycle strong-field tunneling dynamics in solids
type: journal_article
user_id: '16199'
volume: 32
year: '2024'
...
---
_id: '54668'
abstract:
- lang: eng
text: Samples of dielectric optical waveguides of rib or strip type in thin-film
lithium niobate (TFLN) technology are characterized with respect to their optical
loss using the Fabry-Pérot method. Attributing the losses mainly to sidewall roughness,
we employ a simple perturbational procedure, based on rigorously computed mode
profiles of idealized channels, to estimate the attenuation for waveguides with
different cross sections. A single fit parameter suffices for an adequate modelling
of the effect of the waveguide geometry on the loss levels.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Silia
full_name: Babel, Silia
id: '63231'
last_name: Babel
orcid: https://orcid.org/0000-0002-1568-2580
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Babel S, Farheen H, et al. Estimation of losses caused by sidewall
roughness in thin-film lithium niobate rib and strip waveguides. Optics Express.
2024;32(13):22878. doi:10.1364/oe.521766
apa: Hammer, M., Babel, S., Farheen, H., Padberg, L., Scheytt, J. C., Silberhorn,
C., & Förstner, J. (2024). Estimation of losses caused by sidewall roughness
in thin-film lithium niobate rib and strip waveguides. Optics Express,
32(13), 22878. https://doi.org/10.1364/oe.521766
bibtex: '@article{Hammer_Babel_Farheen_Padberg_Scheytt_Silberhorn_Förstner_2024,
title={Estimation of losses caused by sidewall roughness in thin-film lithium
niobate rib and strip waveguides}, volume={32}, DOI={10.1364/oe.521766},
number={13}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Hammer,
Manfred and Babel, Silia and Farheen, Henna and Padberg, Laura and Scheytt, J.
Christoph and Silberhorn, Christine and Förstner, Jens}, year={2024}, pages={22878}
}'
chicago: 'Hammer, Manfred, Silia Babel, Henna Farheen, Laura Padberg, J. Christoph
Scheytt, Christine Silberhorn, and Jens Förstner. “Estimation of Losses Caused
by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.”
Optics Express 32, no. 13 (2024): 22878. https://doi.org/10.1364/oe.521766.'
ieee: 'M. Hammer et al., “Estimation of losses caused by sidewall roughness
in thin-film lithium niobate rib and strip waveguides,” Optics Express,
vol. 32, no. 13, p. 22878, 2024, doi: 10.1364/oe.521766.'
mla: Hammer, Manfred, et al. “Estimation of Losses Caused by Sidewall Roughness
in Thin-Film Lithium Niobate Rib and Strip Waveguides.” Optics Express,
vol. 32, no. 13, Optica Publishing Group, 2024, p. 22878, doi:10.1364/oe.521766.
short: M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn,
J. Förstner, Optics Express 32 (2024) 22878.
date_created: 2024-06-10T11:18:06Z
date_updated: 2024-07-22T07:43:02Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
- _id: '623'
- _id: '263'
- _id: '288'
doi: 10.1364/oe.521766
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-06-10T11:25:00Z
date_updated: 2024-06-10T11:25:00Z
file_id: '54669'
file_name: 2024-06 Hammer - Optics Express - Estimation of losses caused by sidewall
roughness in thin-film lithium niobate rib and strip waveguides.pdf
file_size: 4004782
relation: main_file
file_date_updated: 2024-06-10T11:25:00Z
has_accepted_license: '1'
intvolume: ' 32'
issue: '13'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: '22878'
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '175'
grant_number: '231447078'
name: 'TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen
Modulatoren auf Basis von CMOS und LNOI (C11*)'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Estimation of losses caused by sidewall roughness in thin-film lithium niobate
rib and strip waveguides
type: journal_article
user_id: '158'
volume: 32
year: '2024'
...
---
_id: '64550'
author:
- first_name: Leon
full_name: Zens, Leon
last_name: Zens
- first_name: Vira
full_name: Besaga, Vira
last_name: Besaga
- first_name: Jens
full_name: Möller, Jens
last_name: Möller
- first_name: Nils Christopher
full_name: Gerhardt, Nils Christopher
id: '115298'
last_name: Gerhardt
orcid: 0009-0002-5538-231X
- first_name: Martin
full_name: Hofmann, Martin
last_name: Hofmann
citation:
ama: Zens L, Besaga V, Möller J, Gerhardt NC, Hofmann M. Holographic measurement
of gain and linewidth enhancement factor in semiconductor waveguides. Optics
Express. Published online 2024. doi:10.1364/oe.538741
apa: Zens, L., Besaga, V., Möller, J., Gerhardt, N. C., & Hofmann, M. (2024).
Holographic measurement of gain and linewidth enhancement factor in semiconductor
waveguides. Optics Express. https://doi.org/10.1364/oe.538741
bibtex: '@article{Zens_Besaga_Möller_Gerhardt_Hofmann_2024, title={Holographic measurement
of gain and linewidth enhancement factor in semiconductor waveguides}, DOI={10.1364/oe.538741}, journal={Optics
Express}, publisher={Optica Publishing Group}, author={Zens, Leon and Besaga,
Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin}, year={2024}
}'
chicago: Zens, Leon, Vira Besaga, Jens Möller, Nils Christopher Gerhardt, and Martin
Hofmann. “Holographic Measurement of Gain and Linewidth Enhancement Factor in
Semiconductor Waveguides.” Optics Express, 2024. https://doi.org/10.1364/oe.538741.
ieee: 'L. Zens, V. Besaga, J. Möller, N. C. Gerhardt, and M. Hofmann, “Holographic
measurement of gain and linewidth enhancement factor in semiconductor waveguides,”
Optics Express, 2024, doi: 10.1364/oe.538741.'
mla: Zens, Leon, et al. “Holographic Measurement of Gain and Linewidth Enhancement
Factor in Semiconductor Waveguides.” Optics Express, Optica Publishing
Group, 2024, doi:10.1364/oe.538741.
short: L. Zens, V. Besaga, J. Möller, N.C. Gerhardt, M. Hofmann, Optics Express
(2024).
date_created: 2026-02-20T11:10:34Z
date_updated: 2026-02-20T11:14:32Z
department:
- _id: '977'
doi: 10.1364/oe.538741
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Holographic measurement of gain and linewidth enhancement factor in semiconductor
waveguides
type: journal_article
user_id: '15911'
year: '2024'
...
---
_id: '64549'
author:
- first_name: Leon
full_name: Zens, Leon
last_name: Zens
- first_name: Vira
full_name: Besaga, Vira
last_name: Besaga
- first_name: Jens
full_name: Möller, Jens
last_name: Möller
- first_name: Nils Christopher
full_name: Gerhardt, Nils Christopher
id: '115298'
last_name: Gerhardt
orcid: 0009-0002-5538-231X
- first_name: Martin
full_name: Hofmann, Martin
last_name: Hofmann
citation:
ama: Zens L, Besaga V, Möller J, Gerhardt NC, Hofmann M. Holographic measurement
of gain and linewidth enhancement factor in semiconductor waveguides. Optics
Express. Published online 2024. doi:10.1364/oe.538741
apa: Zens, L., Besaga, V., Möller, J., Gerhardt, N. C., & Hofmann, M. (2024).
Holographic measurement of gain and linewidth enhancement factor in semiconductor
waveguides. Optics Express. https://doi.org/10.1364/oe.538741
bibtex: '@article{Zens_Besaga_Möller_Gerhardt_Hofmann_2024, title={Holographic measurement
of gain and linewidth enhancement factor in semiconductor waveguides}, DOI={10.1364/oe.538741}, journal={Optics
Express}, publisher={Optica Publishing Group}, author={Zens, Leon and Besaga,
Vira and Möller, Jens and Gerhardt, Nils Christopher and Hofmann, Martin}, year={2024}
}'
chicago: Zens, Leon, Vira Besaga, Jens Möller, Nils Christopher Gerhardt, and Martin
Hofmann. “Holographic Measurement of Gain and Linewidth Enhancement Factor in
Semiconductor Waveguides.” Optics Express, 2024. https://doi.org/10.1364/oe.538741.
ieee: 'L. Zens, V. Besaga, J. Möller, N. C. Gerhardt, and M. Hofmann, “Holographic
measurement of gain and linewidth enhancement factor in semiconductor waveguides,”
Optics Express, 2024, doi: 10.1364/oe.538741.'
mla: Zens, Leon, et al. “Holographic Measurement of Gain and Linewidth Enhancement
Factor in Semiconductor Waveguides.” Optics Express, Optica Publishing
Group, 2024, doi:10.1364/oe.538741.
short: L. Zens, V. Besaga, J. Möller, N.C. Gerhardt, M. Hofmann, Optics Express
(2024).
date_created: 2026-02-20T11:09:40Z
date_updated: 2026-02-23T13:06:50Z
department:
- _id: '977'
doi: 10.1364/oe.538741
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Holographic measurement of gain and linewidth enhancement factor in semiconductor
waveguides
type: journal_article
user_id: '15911'
year: '2024'
...
---
_id: '63216'
abstract:
- lang: eng
text: The characterization of the complex spectral amplitude, that is, the
spectrum and spectral phase, of single-photon-level light fields is a crucial
capability for modern photonic quantum technologies. Since established pulse characterization
techniques are not applicable at low intensities, alternative approaches are required.
Here, we demonstrate the retrieval of the complex spectral amplitude of single-photon-level
light pulses through measuring their chronocyclic Q −function.
Our approach draws inspiration from quantum state tomography by exploiting the
analogy between quadrature phase space and time-frequency phase space. In the
experiment, we perform time-frequency projections with a quantum pulse gate (QPG),
which directly yield the chronocyclic Q −function.
We evaluate the complex spectral amplitude from the measured chronocyclic Q −function data with maximum likelihood estimation
(MLE), which is the established technique for quantum state tomography. The MLE
yields not only an unambigious estimate of the complex spectral amplitude of the
state under test that does not require any a priori
information, but also allows for, in principle, estimating the spectral-temporal
coherence properties of the state. Our method accurately recovers features such
as jumps in the spectral phase and is resistant against regions with zero spectral
intensity, which makes it immediately beneficial for classical pulse characterization
problems.
article_number: '5551'
author:
- first_name: Abhinandan
full_name: Bhattacharjee, Abhinandan
id: '95902'
last_name: Bhattacharjee
- first_name: Patrick Fabian
full_name: Folge, Patrick Fabian
id: '88605'
last_name: Folge
- first_name: Laura Maria
full_name: Serino, Laura Maria
id: '88242'
last_name: Serino
- first_name: Jaroslav
full_name: Řeháček, Jaroslav
last_name: Řeháček
- first_name: Zdeněk
full_name: Hradil, Zdeněk
last_name: Hradil
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
citation:
ama: Bhattacharjee A, Folge PF, Serino LM, et al. Pulse characterization at the
single-photon level through chronocyclic Q-function measurements. Optics
Express. 2024;33(3). doi:10.1364/oe.540125
apa: Bhattacharjee, A., Folge, P. F., Serino, L. M., Řeháček, J., Hradil, Z., Silberhorn,
C., & Brecht, B. (2024). Pulse characterization at the single-photon level
through chronocyclic Q-function measurements. Optics Express, 33(3),
Article 5551. https://doi.org/10.1364/oe.540125
bibtex: '@article{Bhattacharjee_Folge_Serino_Řeháček_Hradil_Silberhorn_Brecht_2024,
title={Pulse characterization at the single-photon level through chronocyclic
Q-function measurements}, volume={33}, DOI={10.1364/oe.540125},
number={35551}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Bhattacharjee, Abhinandan and Folge, Patrick Fabian and Serino, Laura
Maria and Řeháček, Jaroslav and Hradil, Zdeněk and Silberhorn, Christine and Brecht,
Benjamin}, year={2024} }'
chicago: Bhattacharjee, Abhinandan, Patrick Fabian Folge, Laura Maria Serino, Jaroslav
Řeháček, Zdeněk Hradil, Christine Silberhorn, and Benjamin Brecht. “Pulse Characterization
at the Single-Photon Level through Chronocyclic Q-Function Measurements.”
Optics Express 33, no. 3 (2024). https://doi.org/10.1364/oe.540125.
ieee: 'A. Bhattacharjee et al., “Pulse characterization at the single-photon
level through chronocyclic Q-function measurements,” Optics Express,
vol. 33, no. 3, Art. no. 5551, 2024, doi: 10.1364/oe.540125.'
mla: Bhattacharjee, Abhinandan, et al. “Pulse Characterization at the Single-Photon
Level through Chronocyclic Q-Function Measurements.” Optics Express,
vol. 33, no. 3, 5551, Optica Publishing Group, 2024, doi:10.1364/oe.540125.
short: A. Bhattacharjee, P.F. Folge, L.M. Serino, J. Řeháček, Z. Hradil, C. Silberhorn,
B. Brecht, Optics Express 33 (2024).
date_created: 2025-12-18T16:08:16Z
date_updated: 2025-12-18T16:08:40Z
department:
- _id: '15'
- _id: '623'
doi: 10.1364/oe.540125
intvolume: ' 33'
issue: '3'
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Pulse characterization at the single-photon level through chronocyclic Q-function
measurements
type: journal_article
user_id: '27150'
volume: 33
year: '2024'
...
---
_id: '63217'
abstract:
- lang: eng
text: We demonstrate a high-dimensional mode-sorter for single photons based
on a multi-output quantum pulse gate, which we can program to switch between different
temporal-mode encodings including pulse modes, frequency bins, time bins, and
their superpositions. This device can facilitate practical realizations of quantum
information applications such as high-dimensional quantum key distribution and
thus enables secure communication with enhanced information capacity. We characterize
the mode-sorter through a detector tomography in 3 and 5 dimensions and find a
fidelity up to 0.958 ± 0.030 at the single-photon level.
article_number: '5577'
author:
- first_name: Laura Maria
full_name: Serino, Laura Maria
id: '88242'
last_name: Serino
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- 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
citation:
ama: Serino LM, Eigner C, Brecht B, Silberhorn C. Programmable time-frequency mode-sorting
of single photons with a multi-output quantum pulse gate. Optics Express.
2024;33(3). doi:10.1364/oe.544206
apa: Serino, L. M., Eigner, C., Brecht, B., & Silberhorn, C. (2024). Programmable
time-frequency mode-sorting of single photons with a multi-output quantum pulse
gate. Optics Express, 33(3), Article 5577. https://doi.org/10.1364/oe.544206
bibtex: '@article{Serino_Eigner_Brecht_Silberhorn_2024, title={Programmable time-frequency
mode-sorting of single photons with a multi-output quantum pulse gate}, volume={33},
DOI={10.1364/oe.544206}, number={35577},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Serino,
Laura Maria and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine},
year={2024} }'
chicago: Serino, Laura Maria, Christof Eigner, Benjamin Brecht, and Christine Silberhorn.
“Programmable Time-Frequency Mode-Sorting of Single Photons with a Multi-Output
Quantum Pulse Gate.” Optics Express 33, no. 3 (2024). https://doi.org/10.1364/oe.544206.
ieee: 'L. M. Serino, C. Eigner, B. Brecht, and C. Silberhorn, “Programmable time-frequency
mode-sorting of single photons with a multi-output quantum pulse gate,” Optics
Express, vol. 33, no. 3, Art. no. 5577, 2024, doi: 10.1364/oe.544206.'
mla: Serino, Laura Maria, et al. “Programmable Time-Frequency Mode-Sorting of Single
Photons with a Multi-Output Quantum Pulse Gate.” Optics Express, vol. 33,
no. 3, 5577, Optica Publishing Group, 2024, doi:10.1364/oe.544206.
short: L.M. Serino, C. Eigner, B. Brecht, C. Silberhorn, Optics Express 33 (2024).
date_created: 2025-12-18T16:09:22Z
date_updated: 2025-12-18T16:09:44Z
department:
- _id: '15'
- _id: '623'
doi: 10.1364/oe.544206
intvolume: ' 33'
issue: '3'
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Programmable time-frequency mode-sorting of single photons with a multi-output
quantum pulse gate
type: journal_article
user_id: '27150'
volume: 33
year: '2024'
...
---
_id: '54815'
abstract:
- lang: eng
text: "Broadband quantum light is a vital resource for quantum metrology
and spectroscopy applications such as quantum optical coherence tomography or
entangled two photon absorption. For entangled two photon absorption in particular,
very high photon flux combined with high time-frequency entanglement is crucial
for observing a signal. So far these conditions could be met by using high power
lasers driving degenerate, type 0 bulk-crystal spontaneous parametric down conversion
(SPDC) sources. This naturally limits the available wavelength ranges and precludes
deterministic splitting of the generated output photons. In this work we demonstrate
an integrated two-colour SPDC source utilising a group-velocity matched lithium
niobate waveguide, reaching both exceptional brightness 1.52⋅106pairssmWGHz
and large bandwidth (7.8 THz FWHM) while pumped with a few mW of continuous wave
(CW) laser light. By converting a narrow band pump to broadband pulses the created
photon pairs show correlation times of Δτ ≈ 120 fs
while maintaining the narrow bandwidth Δω\r\n
\ p\r\n ≪ 1 MHz of the CW pump light,
yielding strong time-frequency entanglement. Furthermore our process can be adapted
to a wide range of central wavelengths."
article_number: '23945'
article_type: original
author:
- first_name: René
full_name: Pollmann, René
id: '78890'
last_name: Pollmann
- first_name: Franz
full_name: Roeder, Franz
id: '88149'
last_name: Roeder
- first_name: Victor
full_name: Quiring, Victor
last_name: Quiring
- first_name: Raimund
full_name: Ricken, Raimund
last_name: Ricken
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- 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
citation:
ama: Pollmann R, Roeder F, Quiring V, et al. Integrated, bright broadband, two-colour
parametric down-conversion source. Optics Express. 2024;32(14). doi:10.1364/oe.522549
apa: Pollmann, R., Roeder, F., Quiring, V., Ricken, R., Eigner, C., Brecht, B.,
& Silberhorn, C. (2024). Integrated, bright broadband, two-colour parametric
down-conversion source. Optics Express, 32(14), Article 23945. https://doi.org/10.1364/oe.522549
bibtex: '@article{Pollmann_Roeder_Quiring_Ricken_Eigner_Brecht_Silberhorn_2024,
title={Integrated, bright broadband, two-colour parametric down-conversion source},
volume={32}, DOI={10.1364/oe.522549},
number={1423945}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Pollmann, René and Roeder, Franz and Quiring, Victor and Ricken, Raimund
and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2024}
}'
chicago: Pollmann, René, Franz Roeder, Victor Quiring, Raimund Ricken, Christof
Eigner, Benjamin Brecht, and Christine Silberhorn. “Integrated, Bright Broadband,
Two-Colour Parametric down-Conversion Source.” Optics Express 32, no. 14
(2024). https://doi.org/10.1364/oe.522549.
ieee: 'R. Pollmann et al., “Integrated, bright broadband, two-colour parametric
down-conversion source,” Optics Express, vol. 32, no. 14, Art. no. 23945,
2024, doi: 10.1364/oe.522549.'
mla: Pollmann, René, et al. “Integrated, Bright Broadband, Two-Colour Parametric
down-Conversion Source.” Optics Express, vol. 32, no. 14, 23945, Optica
Publishing Group, 2024, doi:10.1364/oe.522549.
short: R. Pollmann, F. Roeder, V. Quiring, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn,
Optics Express 32 (2024).
date_created: 2024-06-19T06:58:17Z
date_updated: 2025-12-19T11:37:41Z
department:
- _id: '15'
- _id: '623'
- _id: '288'
doi: 10.1364/oe.522549
intvolume: ' 32'
issue: '14'
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Integrated, bright broadband, two-colour parametric down-conversion source
type: journal_article
user_id: '78890'
volume: 32
year: '2024'
...
---
_id: '48349'
abstract:
- lang: eng
text: We report a titanium indiffused waveguide resonator featuring an integrated
electro-optic modulator for cavity length stabilisation that produces close to
5 dB of squeezed light at 1550 nm (2.4 dB directly measured). The resonator is
locked on resonance for tens of minutes with 70 mW of SH light incident on the
cavity, demonstrating that photorefraction can be mitigated. Squeezed light production
concurrent with cavity length stabilisation utilising the integrated EOM is demonstrated.
The device demonstrates the suitability of this platform for squeezed light generation
in network applications, where stabilisation to the reference field is typically
necessary.
article_number: '34903'
author:
- first_name: M.
full_name: Stefszky, M.
last_name: Stefszky
- first_name: F.
full_name: vom Bruch, F.
last_name: vom Bruch
- first_name: M.
full_name: Santandrea, M.
last_name: Santandrea
- first_name: R.
full_name: Ricken, R.
last_name: Ricken
- first_name: V.
full_name: Quiring, V.
last_name: Quiring
- first_name: C.
full_name: Eigner, C.
last_name: Eigner
- first_name: H
full_name: Herrmann, H
last_name: Herrmann
- first_name: C
full_name: Silberhorn, C
last_name: Silberhorn
citation:
ama: Stefszky M, vom Bruch F, Santandrea M, et al. Lithium niobate waveguide squeezer
with integrated cavity length stabilisation for network applications. Optics
Express. 2023;31(21). doi:10.1364/oe.498423
apa: Stefszky, M., vom Bruch, F., Santandrea, M., Ricken, R., Quiring, V., Eigner,
C., Herrmann, H., & Silberhorn, C. (2023). Lithium niobate waveguide squeezer
with integrated cavity length stabilisation for network applications. Optics
Express, 31(21), Article 34903. https://doi.org/10.1364/oe.498423
bibtex: '@article{Stefszky_vom Bruch_Santandrea_Ricken_Quiring_Eigner_Herrmann_Silberhorn_2023,
title={Lithium niobate waveguide squeezer with integrated cavity length stabilisation
for network applications}, volume={31}, DOI={10.1364/oe.498423},
number={2134903}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Stefszky, M. and vom Bruch, F. and Santandrea, M. and Ricken, R. and Quiring,
V. and Eigner, C. and Herrmann, H and Silberhorn, C}, year={2023} }'
chicago: Stefszky, M., F. vom Bruch, M. Santandrea, R. Ricken, V. Quiring, C. Eigner,
H Herrmann, and C Silberhorn. “Lithium Niobate Waveguide Squeezer with Integrated
Cavity Length Stabilisation for Network Applications.” Optics Express 31,
no. 21 (2023). https://doi.org/10.1364/oe.498423.
ieee: 'M. Stefszky et al., “Lithium niobate waveguide squeezer with integrated
cavity length stabilisation for network applications,” Optics Express,
vol. 31, no. 21, Art. no. 34903, 2023, doi: 10.1364/oe.498423.'
mla: Stefszky, M., et al. “Lithium Niobate Waveguide Squeezer with Integrated Cavity
Length Stabilisation for Network Applications.” Optics Express, vol. 31,
no. 21, 34903, Optica Publishing Group, 2023, doi:10.1364/oe.498423.
short: M. Stefszky, F. vom Bruch, M. Santandrea, R. Ricken, V. Quiring, C. Eigner,
H. Herrmann, C. Silberhorn, Optics Express 31 (2023).
date_created: 2023-10-19T14:22:59Z
date_updated: 2023-11-02T09:26:42Z
department:
- _id: '288'
- _id: '623'
doi: 10.1364/oe.498423
intvolume: ' 31'
issue: '21'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Lithium niobate waveguide squeezer with integrated cavity length stabilisation
for network applications
type: journal_article
user_id: '42777'
volume: 31
year: '2023'
...
---
_id: '48399'
abstract:
- lang: eng
text: Quantum photonic processing via electro-optic components typically
requires electronic links across different operation environments, especially
when interfacing cryogenic components such as superconducting single photon detectors
with room-temperature control and readout electronics. However, readout and driving
electronics can introduce detrimental parasitic effects. Here we show an all-optical
control and readout of a superconducting nanowire single photon detector (SNSPD),
completely electrically decoupled from room temperature electronics. We provide
the operation power for the superconducting detector via a cryogenic photodiode,
and readout single photon detection signals via a cryogenic electro-optic modulator
in the same cryostat. This method opens the possibility for control and readout
of superconducting circuits, and feedforward for photonic quantum computing.
article_number: '32717'
author:
- first_name: Frederik
full_name: Thiele, Frederik
id: '50819'
last_name: Thiele
orcid: 0000-0003-0663-5587
- first_name: Thomas
full_name: Hummel, Thomas
id: '83846'
last_name: Hummel
- first_name: Adam N.
full_name: McCaughan, Adam N.
last_name: McCaughan
- first_name: Julian
full_name: Brockmeier, Julian
id: '44807'
last_name: Brockmeier
- first_name: Maximilian
full_name: Protte, Maximilian
id: '46170'
last_name: Protte
- first_name: Victor
full_name: Quiring, Victor
last_name: Quiring
- first_name: Sebastian
full_name: Lengeling, Sebastian
id: '44373'
last_name: Lengeling
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Tim
full_name: Bartley, Tim
id: '49683'
last_name: Bartley
citation:
ama: Thiele F, Hummel T, McCaughan AN, et al. All optical operation of a superconducting
photonic interface. Optics Express. 2023;31(20). doi:10.1364/oe.492035
apa: Thiele, F., Hummel, T., McCaughan, A. N., Brockmeier, J., Protte, M., Quiring,
V., Lengeling, S., Eigner, C., Silberhorn, C., & Bartley, T. (2023). All optical
operation of a superconducting photonic interface. Optics Express, 31(20),
Article 32717. https://doi.org/10.1364/oe.492035
bibtex: '@article{Thiele_Hummel_McCaughan_Brockmeier_Protte_Quiring_Lengeling_Eigner_Silberhorn_Bartley_2023,
title={All optical operation of a superconducting photonic interface}, volume={31},
DOI={10.1364/oe.492035}, number={2032717},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Thiele,
Frederik and Hummel, Thomas and McCaughan, Adam N. and Brockmeier, Julian and
Protte, Maximilian and Quiring, Victor and Lengeling, Sebastian and Eigner, Christof
and Silberhorn, Christine and Bartley, Tim}, year={2023} }'
chicago: Thiele, Frederik, Thomas Hummel, Adam N. McCaughan, Julian Brockmeier,
Maximilian Protte, Victor Quiring, Sebastian Lengeling, Christof Eigner, Christine
Silberhorn, and Tim Bartley. “All Optical Operation of a Superconducting Photonic
Interface.” Optics Express 31, no. 20 (2023). https://doi.org/10.1364/oe.492035.
ieee: 'F. Thiele et al., “All optical operation of a superconducting photonic
interface,” Optics Express, vol. 31, no. 20, Art. no. 32717, 2023, doi:
10.1364/oe.492035.'
mla: Thiele, Frederik, et al. “All Optical Operation of a Superconducting Photonic
Interface.” Optics Express, vol. 31, no. 20, 32717, Optica Publishing Group,
2023, doi:10.1364/oe.492035.
short: F. Thiele, T. Hummel, A.N. McCaughan, J. Brockmeier, M. Protte, V. Quiring,
S. Lengeling, C. Eigner, C. Silberhorn, T. Bartley, Optics Express 31 (2023).
date_created: 2023-10-24T06:43:16Z
date_updated: 2023-11-27T08:43:33Z
doi: 10.1364/oe.492035
intvolume: ' 31'
issue: '20'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: All optical operation of a superconducting photonic interface
type: journal_article
user_id: '50819'
volume: 31
year: '2023'
...
---
_id: '45704'
abstract:
- lang: eng
text: Since high-order harmonic generation (HHG) from atoms depends sensitively
on the polarization of the driving laser field, the polarization gating (PG) technique
was developed and applied successfully to generate isolated attosecond pulses
from atomic gases. The situation is, however, different in solid-state systems
as it has been demonstrated that due to collisions with neighboring atomic cores
of the crystal lattice strong HHG can be generated even by elliptically- and circularly-polarized
laser fields. Here we apply PG to solid-state systems and find that the conventional
PG technique is inefficient for the generation of isolated ultrashort harmonic
pulse bursts. In contrast, we demonstrate that a polarization-skewed laser pulse
is able to confine the harmonic emission to a time window of less than one-tenth
of the laser cycle. This method provides a novel way to control HHG and to generate
isolated attosecond pulses in solids.
article_number: '18862'
author:
- first_name: Xiaohong
full_name: Song, Xiaohong
last_name: Song
- first_name: Shidong
full_name: Yang, Shidong
last_name: Yang
- first_name: Guifang
full_name: Wang, Guifang
last_name: Wang
- first_name: Jianpeng
full_name: Lin, Jianpeng
last_name: Lin
- first_name: Liang
full_name: Wang, Liang
last_name: Wang
- 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: Song X, Yang S, Wang G, et al. Control of the electron dynamics in solid-state
high harmonic generation on ultrafast time scales by a polarization-skewed laser
pulse. Optics Express. 2023;31(12). doi:10.1364/oe.491418
apa: Song, X., Yang, S., Wang, G., Lin, J., Wang, L., Meier, T., & Yang, W.
(2023). Control of the electron dynamics in solid-state high harmonic generation
on ultrafast time scales by a polarization-skewed laser pulse. Optics Express,
31(12), Article 18862. https://doi.org/10.1364/oe.491418
bibtex: '@article{Song_Yang_Wang_Lin_Wang_Meier_Yang_2023, title={Control of the
electron dynamics in solid-state high harmonic generation on ultrafast time scales
by a polarization-skewed laser pulse}, volume={31}, DOI={10.1364/oe.491418},
number={1218862}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Song, Xiaohong and Yang, Shidong and Wang, Guifang and Lin, Jianpeng and
Wang, Liang and Meier, Torsten and Yang, Weifeng}, year={2023} }'
chicago: Song, Xiaohong, Shidong Yang, Guifang Wang, Jianpeng Lin, Liang Wang, Torsten
Meier, and Weifeng Yang. “Control of the Electron Dynamics in Solid-State High
Harmonic Generation on Ultrafast Time Scales by a Polarization-Skewed Laser Pulse.”
Optics Express 31, no. 12 (2023). https://doi.org/10.1364/oe.491418.
ieee: 'X. Song et al., “Control of the electron dynamics in solid-state high
harmonic generation on ultrafast time scales by a polarization-skewed laser pulse,”
Optics Express, vol. 31, no. 12, Art. no. 18862, 2023, doi: 10.1364/oe.491418.'
mla: Song, Xiaohong, et al. “Control of the Electron Dynamics in Solid-State High
Harmonic Generation on Ultrafast Time Scales by a Polarization-Skewed Laser Pulse.”
Optics Express, vol. 31, no. 12, 18862, Optica Publishing Group, 2023,
doi:10.1364/oe.491418.
short: X. Song, S. Yang, G. Wang, J. Lin, L. Wang, T. Meier, W. Yang, Optics Express
31 (2023).
date_created: 2023-06-21T09:55:18Z
date_updated: 2023-06-21T09:56:31Z
department:
- _id: '15'
- _id: '170'
- _id: '293'
- _id: '35'
- _id: '230'
- _id: '429'
doi: 10.1364/oe.491418
intvolume: ' 31'
issue: '12'
keyword:
- Atomic and Molecular Physics
- and Optics
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: '165'
grant_number: '231447078'
name: 'TRR 142 - A10: TRR 142 - Nichtlinearitäten von atomar dünnen Übergangsmetall-Dichalkogeniden
in starken Feldern (A10*)'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Control of the electron dynamics in solid-state high harmonic generation on
ultrafast time scales by a polarization-skewed laser pulse
type: journal_article
user_id: '16199'
volume: 31
year: '2023'
...
---
_id: '45850'
abstract:
- lang: eng
text: Interference between single photons is key for many quantum optics experiments
and applications in quantum technologies, such as quantum communication or computation.
It is advantageous to operate the systems at telecommunication wavelengths and
to integrate the setups for these applications in order to improve stability,
compactness and scalability. A new promising material platform for integrated
quantum optics is lithium niobate on insulator (LNOI). Here, we realise Hong-Ou-Mandel
(HOM) interference between telecom photons from an engineered parametric down-conversion
source in an LNOI directional coupler. The coupler has been designed and fabricated
in house and provides close to perfect balanced beam splitting. We obtain a raw
HOM visibility of (93.5 ± 0.7) %, limited mainly by the source performance and
in good agreement with off-chip measurements. This lays the foundation for more
sophisticated quantum experiments in LNOI.
article_number: '23140'
author:
- first_name: Silia
full_name: Babel, Silia
id: '63231'
last_name: Babel
orcid: https://orcid.org/0000-0002-1568-2580
- first_name: Laura
full_name: Bollmers, Laura
id: '61375'
last_name: Bollmers
- first_name: Marcello
full_name: Massaro, Marcello
id: '59545'
last_name: Massaro
orcid: 0000-0002-2539-7652
- first_name: Kai Hong
full_name: Luo, Kai Hong
id: '36389'
last_name: Luo
orcid: 0000-0003-1008-4976
- first_name: Michael
full_name: Stefszky, Michael
id: '42777'
last_name: Stefszky
- first_name: Federico
full_name: Pegoraro, Federico
id: '88928'
last_name: Pegoraro
- first_name: Philip
full_name: Held, Philip
id: '68236'
last_name: Held
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Benjamin
full_name: Brecht, Benjamin
id: '27150'
last_name: Brecht
orcid: '0000-0003-4140-0556 '
- first_name: Laura
full_name: Padberg, Laura
id: '40300'
last_name: Padberg
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Babel S, Bollmers L, Massaro M, et al. Demonstration of Hong-Ou-Mandel interference
in an LNOI directional coupler. Optics Express. 2023;31(14). doi:10.1364/oe.484126
apa: Babel, S., Bollmers, L., Massaro, M., Luo, K. H., Stefszky, M., Pegoraro, F.,
Held, P., Herrmann, H., Eigner, C., Brecht, B., Padberg, L., & Silberhorn,
C. (2023). Demonstration of Hong-Ou-Mandel interference in an LNOI directional
coupler. Optics Express, 31(14), Article 23140. https://doi.org/10.1364/oe.484126
bibtex: '@article{Babel_Bollmers_Massaro_Luo_Stefszky_Pegoraro_Held_Herrmann_Eigner_Brecht_et
al._2023, title={Demonstration of Hong-Ou-Mandel interference in an LNOI directional
coupler}, volume={31}, DOI={10.1364/oe.484126},
number={1423140}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Babel, Silia and Bollmers, Laura and Massaro, Marcello and Luo, Kai Hong
and Stefszky, Michael and Pegoraro, Federico and Held, Philip and Herrmann, Harald
and Eigner, Christof and Brecht, Benjamin and et al.}, year={2023} }'
chicago: Babel, Silia, Laura Bollmers, Marcello Massaro, Kai Hong Luo, Michael Stefszky,
Federico Pegoraro, Philip Held, et al. “Demonstration of Hong-Ou-Mandel Interference
in an LNOI Directional Coupler.” Optics Express 31, no. 14 (2023). https://doi.org/10.1364/oe.484126.
ieee: 'S. Babel et al., “Demonstration of Hong-Ou-Mandel interference in
an LNOI directional coupler,” Optics Express, vol. 31, no. 14, Art. no.
23140, 2023, doi: 10.1364/oe.484126.'
mla: Babel, Silia, et al. “Demonstration of Hong-Ou-Mandel Interference in an LNOI
Directional Coupler.” Optics Express, vol. 31, no. 14, 23140, Optica Publishing
Group, 2023, doi:10.1364/oe.484126.
short: S. Babel, L. Bollmers, M. Massaro, K.H. Luo, M. Stefszky, F. Pegoraro, P.
Held, H. Herrmann, C. Eigner, B. Brecht, L. Padberg, C. Silberhorn, Optics Express
31 (2023).
date_created: 2023-07-03T14:08:36Z
date_updated: 2023-07-05T07:58:31Z
department:
- _id: '15'
- _id: '230'
- _id: '623'
- _id: '288'
doi: 10.1364/oe.484126
intvolume: ' 31'
issue: '14'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler
type: journal_article
user_id: '63231'
volume: 31
year: '2023'
...
---
_id: '46644'
abstract:
- lang: eng
text: A reliable, but cost-effective generation of single-photon states is key for
practical quantum communication systems. For real-world deployment, waveguide
sources offer optimum compatibility with fiber networks and can be embedded in
hybrid integrated modules. Here, we present what we believe to be the first chip-size
fully integrated fiber-coupled heralded single photon source (HSPS) module based
on a hybrid integration of a nonlinear lithium niobate waveguide into a polymer
board. Photon pairs at 810 nm (signal) and 1550 nm (idler) are generated via parametric
down-conversion pumped at 532 nm in the LiNbO3 waveguide. The pairs are split
in the polymer board and routed to separate output ports. The module has a size
of (2 × 1) cm^2 and is fully fiber-coupled with one pump input fiber and two output
fibers. We measure a heralded second-order correlation function of g_h(2)=0.05
with a heralding efficiency of η_h=3.5% at low pump powers
article_number: '22685'
article_type: original
author:
- first_name: Christian
full_name: Kießler, Christian
id: '44252'
last_name: Kießler
- first_name: Hauke
full_name: Conradi, Hauke
last_name: Conradi
- first_name: Moritz
full_name: Kleinert, Moritz
last_name: Kleinert
- first_name: Viktor
full_name: Quiring, Viktor
last_name: Quiring
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
citation:
ama: Kießler C, Conradi H, Kleinert M, Quiring V, Herrmann H, Silberhorn C. Fiber-coupled
plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology.
Optics Express. 2023;31(14). doi:10.1364/oe.487581
apa: Kießler, C., Conradi, H., Kleinert, M., Quiring, V., Herrmann, H., & Silberhorn,
C. (2023). Fiber-coupled plug-and-play heralded single photon source based on
Ti:LiNbO3 and polymer technology. Optics Express, 31(14), Article
22685. https://doi.org/10.1364/oe.487581
bibtex: '@article{Kießler_Conradi_Kleinert_Quiring_Herrmann_Silberhorn_2023, title={Fiber-coupled
plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology},
volume={31}, DOI={10.1364/oe.487581},
number={1422685}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Kießler, Christian and Conradi, Hauke and Kleinert, Moritz and Quiring,
Viktor and Herrmann, Harald and Silberhorn, Christine}, year={2023} }'
chicago: Kießler, Christian, Hauke Conradi, Moritz Kleinert, Viktor Quiring, Harald
Herrmann, and Christine Silberhorn. “Fiber-Coupled Plug-and-Play Heralded Single
Photon Source Based on Ti:LiNbO3 and Polymer Technology.” Optics Express
31, no. 14 (2023). https://doi.org/10.1364/oe.487581.
ieee: 'C. Kießler, H. Conradi, M. Kleinert, V. Quiring, H. Herrmann, and C. Silberhorn,
“Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3
and polymer technology,” Optics Express, vol. 31, no. 14, Art. no. 22685,
2023, doi: 10.1364/oe.487581.'
mla: Kießler, Christian, et al. “Fiber-Coupled Plug-and-Play Heralded Single Photon
Source Based on Ti:LiNbO3 and Polymer Technology.” Optics Express, vol.
31, no. 14, 22685, Optica Publishing Group, 2023, doi:10.1364/oe.487581.
short: C. Kießler, H. Conradi, M. Kleinert, V. Quiring, H. Herrmann, C. Silberhorn,
Optics Express 31 (2023).
date_created: 2023-08-23T07:20:06Z
date_updated: 2023-08-23T07:25:37Z
doi: 10.1364/oe.487581
intvolume: ' 31'
issue: '14'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3
and polymer technology
type: journal_article
user_id: '44252'
volume: 31
year: '2023'
...
---
_id: '36471'
abstract:
- lang: eng
text: Superconducting nanowire single-photon detectors (SNSPDs) show near
unity efficiency, low dark count rate, and short recovery time. Combining these
characteristics with temporal control of SNSPDs broadens their applications as
in active de-latching for higher dynamic range counting or temporal filtering
for pump-probe spectroscopy or LiDAR. To that end, we demonstrate active gating
of an SNSPD with a minimum off-to-on rise time of 2.4 ns and a total gate length
of 5.0 ns. We show how the rise time depends on the inductance of the detector
in combination with the control electronics. The gate window is demonstrated to
be fully and freely, electrically tunable up to 500 ns at a repetition rate of
1.0 MHz, as well as ungated, free-running operation. Control electronics to generate
the gating are mounted on the 2.3 K stage of a closed-cycle sorption cryostat,
while the detector is operated on the cold stage at 0.8 K. We show that the efficiency
and timing jitter of the detector is not altered during the on-time of the gating
window. We exploit gated operation to demonstrate a method to increase in the
photon counting dynamic range by a factor 11.2, as well as temporal filtering
of a strong pump in an emulated pump-probe experiment.
article_number: '610'
author:
- first_name: Thomas
full_name: Hummel, Thomas
id: '83846'
last_name: Hummel
orcid: 0000-0001-8627-2119
- first_name: Alex
full_name: Widhalm, Alex
last_name: Widhalm
- first_name: Jan Philipp
full_name: Höpker, Jan Philipp
id: '33913'
last_name: Höpker
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Jin
full_name: Chang, Jin
last_name: Chang
- first_name: Andreas
full_name: Fognini, Andreas
last_name: Fognini
- first_name: Stephan
full_name: Steinhauer, Stephan
last_name: Steinhauer
- first_name: Val
full_name: Zwiller, Val
last_name: Zwiller
- first_name: Artur
full_name: Zrenner, Artur
id: '606'
last_name: Zrenner
orcid: 0000-0002-5190-0944
- first_name: Tim
full_name: Bartley, Tim
id: '49683'
last_name: Bartley
citation:
ama: Hummel T, Widhalm A, Höpker JP, et al. Nanosecond gating of superconducting
nanowire single-photon detectors using cryogenic bias circuitry. Optics Express.
2023;31(1). doi:10.1364/oe.472058
apa: Hummel, T., Widhalm, A., Höpker, J. P., Jöns, K., Chang, J., Fognini, A., Steinhauer,
S., Zwiller, V., Zrenner, A., & Bartley, T. (2023). Nanosecond gating of superconducting
nanowire single-photon detectors using cryogenic bias circuitry. Optics Express,
31(1), Article 610. https://doi.org/10.1364/oe.472058
bibtex: '@article{Hummel_Widhalm_Höpker_Jöns_Chang_Fognini_Steinhauer_Zwiller_Zrenner_Bartley_2023,
title={Nanosecond gating of superconducting nanowire single-photon detectors using
cryogenic bias circuitry}, volume={31}, DOI={10.1364/oe.472058},
number={1610}, journal={Optics Express}, publisher={Optica Publishing Group},
author={Hummel, Thomas and Widhalm, Alex and Höpker, Jan Philipp and Jöns, Klaus
and Chang, Jin and Fognini, Andreas and Steinhauer, Stephan and Zwiller, Val and
Zrenner, Artur and Bartley, Tim}, year={2023} }'
chicago: Hummel, Thomas, Alex Widhalm, Jan Philipp Höpker, Klaus Jöns, Jin Chang,
Andreas Fognini, Stephan Steinhauer, Val Zwiller, Artur Zrenner, and Tim Bartley.
“Nanosecond Gating of Superconducting Nanowire Single-Photon Detectors Using Cryogenic
Bias Circuitry.” Optics Express 31, no. 1 (2023). https://doi.org/10.1364/oe.472058.
ieee: 'T. Hummel et al., “Nanosecond gating of superconducting nanowire single-photon
detectors using cryogenic bias circuitry,” Optics Express, vol. 31, no.
1, Art. no. 610, 2023, doi: 10.1364/oe.472058.'
mla: Hummel, Thomas, et al. “Nanosecond Gating of Superconducting Nanowire Single-Photon
Detectors Using Cryogenic Bias Circuitry.” Optics Express, vol. 31, no.
1, 610, Optica Publishing Group, 2023, doi:10.1364/oe.472058.
short: T. Hummel, A. Widhalm, J.P. Höpker, K. Jöns, J. Chang, A. Fognini, S. Steinhauer,
V. Zwiller, A. Zrenner, T. Bartley, Optics Express 31 (2023).
date_created: 2023-01-12T14:46:40Z
date_updated: 2025-12-11T13:05:14Z
department:
- _id: '15'
- _id: '623'
- _id: '230'
- _id: '429'
- _id: '642'
doi: 10.1364/oe.472058
intvolume: ' 31'
issue: '1'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
status: public
title: Nanosecond gating of superconducting nanowire single-photon detectors using
cryogenic bias circuitry
type: journal_article
user_id: '48188'
volume: 31
year: '2023'
...
---
_id: '29716'
article_number: '4867'
author:
- first_name: Alex
full_name: Widhalm, Alex
last_name: Widhalm
- first_name: Christian
full_name: Golla, Christian
last_name: Golla
- first_name: Nils
full_name: Weber, Nils
last_name: Weber
- first_name: Peter
full_name: Mackwitz, Peter
last_name: Mackwitz
- first_name: Artur
full_name: Zrenner, Artur
id: '606'
last_name: Zrenner
orcid: 0000-0002-5190-0944
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
citation:
ama: Widhalm A, Golla C, Weber N, Mackwitz P, Zrenner A, Meier C. Electric-field-induced
second harmonic generation in silicon dioxide. Optics Express. 2022;30(4).
doi:10.1364/oe.443489
apa: Widhalm, A., Golla, C., Weber, N., Mackwitz, P., Zrenner, A., & Meier,
C. (2022). Electric-field-induced second harmonic generation in silicon dioxide.
Optics Express, 30(4), Article 4867. https://doi.org/10.1364/oe.443489
bibtex: '@article{Widhalm_Golla_Weber_Mackwitz_Zrenner_Meier_2022, title={Electric-field-induced
second harmonic generation in silicon dioxide}, volume={30}, DOI={10.1364/oe.443489},
number={44867}, journal={Optics Express}, publisher={The Optical Society}, author={Widhalm,
Alex and Golla, Christian and Weber, Nils and Mackwitz, Peter and Zrenner, Artur
and Meier, Cedrik}, year={2022} }'
chicago: Widhalm, Alex, Christian Golla, Nils Weber, Peter Mackwitz, Artur Zrenner,
and Cedrik Meier. “Electric-Field-Induced Second Harmonic Generation in Silicon
Dioxide.” Optics Express 30, no. 4 (2022). https://doi.org/10.1364/oe.443489.
ieee: 'A. Widhalm, C. Golla, N. Weber, P. Mackwitz, A. Zrenner, and C. Meier, “Electric-field-induced
second harmonic generation in silicon dioxide,” Optics Express, vol. 30,
no. 4, Art. no. 4867, 2022, doi: 10.1364/oe.443489.'
mla: Widhalm, Alex, et al. “Electric-Field-Induced Second Harmonic Generation in
Silicon Dioxide.” Optics Express, vol. 30, no. 4, 4867, The Optical Society,
2022, doi:10.1364/oe.443489.
short: A. Widhalm, C. Golla, N. Weber, P. Mackwitz, A. Zrenner, C. Meier, Optics
Express 30 (2022).
date_created: 2022-02-01T15:36:34Z
date_updated: 2022-02-07T14:20:13Z
department:
- _id: '15'
doi: 10.1364/oe.443489
intvolume: ' 30'
issue: '4'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
project:
- _id: '53'
name: 'TRR 142: TRR 142'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '75'
name: 'TRR 142 - C5: TRR 142 - Subproject C5'
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: The Optical Society
status: public
title: Electric-field-induced second harmonic generation in silicon dioxide
type: journal_article
user_id: '20798'
volume: 30
year: '2022'
...
---
_id: '47980'
abstract:
- lang: eng
text: Recently, ferroelectric domain walls (DWs) have attracted considerable attention
due to their intrinsic topological effects and their huge potential for optoelectronic
applications. In contrast, many of the underlying physical properties and phenomena
are not well characterized. In this regard, analyzing the vibrational properties,
e.g. by Raman spectroscopy, provides direct access to the various local material
properties, such as strains, defects or electric fields. While the optical phonon
spectra of DWs have been widely investigated in the past, no reports on the acoustic
phonon properties of DWs exist. In this work, we present a joint Raman and Brillouin
visualization of ferroelectric DWs in the model ferroelectric lithium niobate.
This is possible by using a combined Raman and virtually imaged phased array Brillouin
setup. Here, we show that DWs can be visualized via frequency shifts observed
in the acoustic phonons, as well. The observed contrast then is qualitatively
explained by models adapted from Raman spectroscopy. This work, hence, provides
a novel route to study ferroelectric DWs and their intrinsic mechanical properties.
article_number: '5051'
article_type: original
author:
- first_name: Jan
full_name: Rix, Jan
last_name: Rix
- first_name: Michael
full_name: Rüsing, Michael
id: '22501'
last_name: Rüsing
orcid: 0000-0003-4682-4577
- first_name: Roberta
full_name: Galli, Roberta
last_name: Galli
- first_name: Jonas
full_name: Golde, Jonas
last_name: Golde
- first_name: Sven
full_name: Reitzig, Sven
last_name: Reitzig
- first_name: Lukas M.
full_name: Eng, Lukas M.
last_name: Eng
- first_name: Edmund
full_name: Koch, Edmund
last_name: Koch
citation:
ama: Rix J, Rüsing M, Galli R, et al. Brillouin and Raman imaging of domain walls
in periodically-poled 5%-MgO:LiNbO3. Optics Express. 2022;30(4). doi:10.1364/oe.447554
apa: Rix, J., Rüsing, M., Galli, R., Golde, J., Reitzig, S., Eng, L. M., & Koch,
E. (2022). Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3.
Optics Express, 30(4), Article 5051. https://doi.org/10.1364/oe.447554
bibtex: '@article{Rix_Rüsing_Galli_Golde_Reitzig_Eng_Koch_2022, title={Brillouin
and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3}, volume={30},
DOI={10.1364/oe.447554}, number={45051},
journal={Optics Express}, publisher={Optica Publishing Group}, author={Rix, Jan
and Rüsing, Michael and Galli, Roberta and Golde, Jonas and Reitzig, Sven and
Eng, Lukas M. and Koch, Edmund}, year={2022} }'
chicago: Rix, Jan, Michael Rüsing, Roberta Galli, Jonas Golde, Sven Reitzig, Lukas
M. Eng, and Edmund Koch. “Brillouin and Raman Imaging of Domain Walls in Periodically-Poled
5%-MgO:LiNbO3.” Optics Express 30, no. 4 (2022). https://doi.org/10.1364/oe.447554.
ieee: 'J. Rix et al., “Brillouin and Raman imaging of domain walls in periodically-poled
5%-MgO:LiNbO3,” Optics Express, vol. 30, no. 4, Art. no. 5051, 2022, doi:
10.1364/oe.447554.'
mla: Rix, Jan, et al. “Brillouin and Raman Imaging of Domain Walls in Periodically-Poled
5%-MgO:LiNbO3.” Optics Express, vol. 30, no. 4, 5051, Optica Publishing
Group, 2022, doi:10.1364/oe.447554.
short: J. Rix, M. Rüsing, R. Galli, J. Golde, S. Reitzig, L.M. Eng, E. Koch, Optics
Express 30 (2022).
date_created: 2023-10-11T08:46:35Z
date_updated: 2023-10-11T08:46:57Z
doi: 10.1364/oe.447554
extern: '1'
intvolume: ' 30'
issue: '4'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Brillouin and Raman imaging of domain walls in periodically-poled 5%-MgO:LiNbO3
type: journal_article
user_id: '22501'
volume: 30
year: '2022'
...