---
_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: '63532'
abstract:
- lang: eng
text: Room-temperature lasing is a key milestone in the development of miniaturized
optoelectronic and photonic devices. We present a simple approach to synthesize
phase-pure quasi-2D layered tin perovskite nanowires with varying quantum well
thicknesses (n = 1 to 4). By incorporating a new organic spacer capable of forming
a hydrogen-bonded organic framework, this method promoted anisotropic crystal
growth and enhanced lattice rigidity. Furthermore, introducing molecular intercalants
enabled controlled crystallization into well-defined nanowires that function as
Fabry–Pérot cavities. Cavities made from n = 2 to 4 perovskites support efficient
and robust near-infrared, room-temperature optically pumped lasing with the threshold
as low as 75.8 μJ/cm2, cavity quality factor over 3000, and negligible degradation
over 106 pulses. A cleaved coupled nanolaser was fabricated as a proof-of-concept
device for photonic applications.
article_type: original
author:
- first_name: Jeong Hui
full_name: Kim, Jeong Hui
last_name: Kim
- first_name: Jeffrey
full_name: Simon, Jeffrey
last_name: Simon
- first_name: Wenhao
full_name: Shao, Wenhao
last_name: Shao
- first_name: Zhichen
full_name: Nian, Zhichen
last_name: Nian
- first_name: Hanjun
full_name: Yang, Hanjun
last_name: Yang
- first_name: Peigang
full_name: Chen, Peigang
last_name: Chen
- first_name: Brandon
full_name: Triplett, Brandon
last_name: Triplett
- first_name: Zhixu
full_name: Li, Zhixu
last_name: Li
- first_name: Pengfei
full_name: Wu, Pengfei
last_name: Wu
- first_name: Yuheng
full_name: Chen, Yuheng
last_name: Chen
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Karthik
full_name: Pagadala, Karthik
last_name: Pagadala
- first_name: Kyu Ri
full_name: Choi, Kyu Ri
last_name: Choi
- first_name: Colton B.
full_name: Fruhling, Colton B.
last_name: Fruhling
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Alexandra
full_name: Boltasseva, Alexandra
last_name: Boltasseva
- first_name: Brett M.
full_name: Savoie, Brett M.
last_name: Savoie
- first_name: Vladimir M.
full_name: Shalaev, Vladimir M.
last_name: Shalaev
- first_name: Letian
full_name: Dou, Letian
last_name: Dou
citation:
ama: Kim JH, Simon J, Shao W, et al. Hydrogen-Bonded Organic Framework Enables Phase-Pure
Layered Tin Perovskite Nanowires for Room-Temperature Lasing. Journal of the
American Chemical Society. Published online 2026:jacs.5c14431. doi:10.1021/jacs.5c14431
apa: Kim, J. H., Simon, J., Shao, W., Nian, Z., Yang, H., Chen, P., Triplett, B.,
Li, Z., Wu, P., Chen, Y., Farheen, H., Pagadala, K., Choi, K. R., Fruhling, C.
B., Förstner, J., Boltasseva, A., Savoie, B. M., Shalaev, V. M., & Dou, L.
(2026). Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite
Nanowires for Room-Temperature Lasing. Journal of the American Chemical Society,
jacs.5c14431. https://doi.org/10.1021/jacs.5c14431
bibtex: '@article{Kim_Simon_Shao_Nian_Yang_Chen_Triplett_Li_Wu_Chen_et al._2026,
title={Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite
Nanowires for Room-Temperature Lasing}, DOI={10.1021/jacs.5c14431},
journal={Journal of the American Chemical Society}, publisher={American Chemical
Society (ACS)}, author={Kim, Jeong Hui and Simon, Jeffrey and Shao, Wenhao and
Nian, Zhichen and Yang, Hanjun and Chen, Peigang and Triplett, Brandon and Li,
Zhixu and Wu, Pengfei and Chen, Yuheng and et al.}, year={2026}, pages={jacs.5c14431}
}'
chicago: Kim, Jeong Hui, Jeffrey Simon, Wenhao Shao, Zhichen Nian, Hanjun Yang,
Peigang Chen, Brandon Triplett, et al. “Hydrogen-Bonded Organic Framework Enables
Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing.” Journal
of the American Chemical Society, 2026, jacs.5c14431. https://doi.org/10.1021/jacs.5c14431.
ieee: 'J. H. Kim et al., “Hydrogen-Bonded Organic Framework Enables Phase-Pure
Layered Tin Perovskite Nanowires for Room-Temperature Lasing,” Journal of the
American Chemical Society, p. jacs.5c14431, 2026, doi: 10.1021/jacs.5c14431.'
mla: Kim, Jeong Hui, et al. “Hydrogen-Bonded Organic Framework Enables Phase-Pure
Layered Tin Perovskite Nanowires for Room-Temperature Lasing.” Journal of the
American Chemical Society, American Chemical Society (ACS), 2026, p. jacs.5c14431,
doi:10.1021/jacs.5c14431.
short: J.H. Kim, J. Simon, W. Shao, Z. Nian, H. Yang, P. Chen, B. Triplett, Z. Li,
P. Wu, Y. Chen, H. Farheen, K. Pagadala, K.R. Choi, C.B. Fruhling, J. Förstner,
A. Boltasseva, B.M. Savoie, V.M. Shalaev, L. Dou, Journal of the American Chemical
Society (2026) jacs.5c14431.
date_created: 2026-01-08T20:48:26Z
date_updated: 2026-01-08T20:54:59Z
ddc:
- '530'
department:
- _id: '61'
- _id: '623'
doi: 10.1021/jacs.5c14431
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2026-01-08T20:51:12Z
date_updated: 2026-01-08T20:51:12Z
file_id: '63533'
file_name: 2026-01 Jeong-Hui-Kim - JACS - Hydrogen-Bonded Organic Framework Enables
Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing (with
Purdue).pdf
file_size: 5453427
relation: main_file
success: 1
file_date_updated: 2026-01-08T20:51:12Z
has_accepted_license: '1'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
page: jacs.5c14431
publication: Journal of the American Chemical Society
publication_identifier:
issn:
- 0002-7863
- 1520-5126
publication_status: published
publisher: American Chemical Society (ACS)
status: public
title: Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite
Nanowires for Room-Temperature Lasing
type: journal_article
user_id: '158'
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: '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: '62296'
author:
- first_name: Carsten
full_name: Spieker, Carsten
id: '67587'
last_name: Spieker
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Jonas
full_name: Hölscher, Jonas
id: '73952'
last_name: Hölscher
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Spieker C, Förstner J, Hölscher J, Claes L, Henning B. Modeling and simulation
of the behavior of piezoceramics with the discontinuous Galerkin method. In: 2025
International Congress on Ultrasonics. AMA Service GmbH; 2025:126–129. doi:10.5162/ultrasonic2025/a18-a1'
apa: Spieker, C., Förstner, J., Hölscher, J., Claes, L., & Henning, B. (2025).
Modeling and simulation of the behavior of piezoceramics with the discontinuous
Galerkin method. 2025 International Congress on Ultrasonics, 126–129. https://doi.org/10.5162/ultrasonic2025/a18-a1
bibtex: '@inproceedings{Spieker_Förstner_Hölscher_Claes_Henning_2025, place={Paderborn},
title={Modeling and simulation of the behavior of piezoceramics with the discontinuous
Galerkin method}, DOI={10.5162/ultrasonic2025/a18-a1},
booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service
GmbH}, author={Spieker, Carsten and Förstner, Jens and Hölscher, Jonas and Claes,
Leander and Henning, Bernd}, year={2025}, pages={126–129} }'
chicago: 'Spieker, Carsten, Jens Förstner, Jonas Hölscher, Leander Claes, and Bernd
Henning. “Modeling and Simulation of the Behavior of Piezoceramics with the Discontinuous
Galerkin Method.” In 2025 International Congress on Ultrasonics, 126–129.
Paderborn: AMA Service GmbH, 2025. https://doi.org/10.5162/ultrasonic2025/a18-a1.'
ieee: 'C. Spieker, J. Förstner, J. Hölscher, L. Claes, and B. Henning, “Modeling
and simulation of the behavior of piezoceramics with the discontinuous Galerkin
method,” in 2025 International Congress on Ultrasonics, 2025, pp. 126–129,
doi: 10.5162/ultrasonic2025/a18-a1.'
mla: Spieker, Carsten, et al. “Modeling and Simulation of the Behavior of Piezoceramics
with the Discontinuous Galerkin Method.” 2025 International Congress on Ultrasonics,
AMA Service GmbH, 2025, pp. 126–129, doi:10.5162/ultrasonic2025/a18-a1.
short: 'C. Spieker, J. Förstner, J. Hölscher, L. Claes, B. Henning, in: 2025 International
Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 126–129.'
date_created: 2025-11-25T12:23:05Z
date_updated: 2026-01-13T13:00:25Z
department:
- _id: '49'
- _id: '61'
doi: 10.5162/ultrasonic2025/a18-a1
language:
- iso: eng
page: 126–129
place: Paderborn
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2025 International Congress on Ultrasonics
publisher: AMA Service GmbH
status: public
title: Modeling and simulation of the behavior of piezoceramics with the discontinuous
Galerkin method
type: conference
user_id: '11829'
year: '2025'
...
---
_id: '62297'
author:
- first_name: Jonas
full_name: Hölscher, Jonas
id: '73952'
last_name: Hölscher
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Carsten
full_name: Spieker, Carsten
id: '67587'
last_name: Spieker
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Hölscher J, Friesen O, Claes L, Spieker C, Förstner J, Henning B. Multiscale
thermo-piezoelectric simulations using the finite element method. In: 2025
International Congress on Ultrasonics. AMA Service GmbH; 2025:130–133. doi:10.5162/ultrasonic2025/a18-a2'
apa: Hölscher, J., Friesen, O., Claes, L., Spieker, C., Förstner, J., & Henning,
B. (2025). Multiscale thermo-piezoelectric simulations using the finite element
method. 2025 International Congress on Ultrasonics, 130–133. https://doi.org/10.5162/ultrasonic2025/a18-a2
bibtex: '@inproceedings{Hölscher_Friesen_Claes_Spieker_Förstner_Henning_2025, place={Paderborn},
title={Multiscale thermo-piezoelectric simulations using the finite element method},
DOI={10.5162/ultrasonic2025/a18-a2},
booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service
GmbH}, author={Hölscher, Jonas and Friesen, Olga and Claes, Leander and Spieker,
Carsten and Förstner, Jens and Henning, Bernd}, year={2025}, pages={130–133} }'
chicago: 'Hölscher, Jonas, Olga Friesen, Leander Claes, Carsten Spieker, Jens Förstner,
and Bernd Henning. “Multiscale Thermo-Piezoelectric Simulations Using the Finite
Element Method.” In 2025 International Congress on Ultrasonics, 130–133.
Paderborn: AMA Service GmbH, 2025. https://doi.org/10.5162/ultrasonic2025/a18-a2.'
ieee: 'J. Hölscher, O. Friesen, L. Claes, C. Spieker, J. Förstner, and B. Henning,
“Multiscale thermo-piezoelectric simulations using the finite element method,”
in 2025 International Congress on Ultrasonics, 2025, pp. 130–133, doi:
10.5162/ultrasonic2025/a18-a2.'
mla: Hölscher, Jonas, et al. “Multiscale Thermo-Piezoelectric Simulations Using
the Finite Element Method.” 2025 International Congress on Ultrasonics,
AMA Service GmbH, 2025, pp. 130–133, doi:10.5162/ultrasonic2025/a18-a2.
short: 'J. Hölscher, O. Friesen, L. Claes, C. Spieker, J. Förstner, B. Henning,
in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025,
pp. 130–133.'
date_created: 2025-11-25T12:23:06Z
date_updated: 2026-01-13T12:59:56Z
department:
- _id: '49'
- _id: '61'
doi: 10.5162/ultrasonic2025/a18-a2
language:
- iso: eng
page: 130–133
place: Paderborn
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2025 International Congress on Ultrasonics
publisher: AMA Service GmbH
status: public
title: Multiscale thermo-piezoelectric simulations using the finite element method
type: conference
user_id: '11829'
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'
...
---
_id: '61760'
abstract:
- lang: eng
text: We present a topology-optimized silicon nitride (Si3N4) coupler designed to
enhance the coupling efficiency between integrated single-photon emitters and
photonic waveguide modes. By leveraging inverse design techniques, we optimize
the coupler’s geometry to maximize power transfer while maintaining fabrication
feasibility by improving mode overlap and directional emission, addressing the
challenge of low coupling efficiency caused by size mismatch and material incompatibility.
Simulations demonstrate a substantial enhancement in photon extraction and waveguide
coupling. This approach can be extended to other photonic devices, offering a
versatile framework for improving quantum light-matter interactions in integrated
photonics.
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Yuheng
full_name: Chen, Yuheng
last_name: Chen
- first_name: Peigang
full_name: Chen, Peigang
last_name: Chen
- first_name: Artem
full_name: Kryvobok, Artem
last_name: Kryvobok
- first_name: Samuel
full_name: Peana, Samuel
last_name: Peana
- first_name: Alexander
full_name: Senichev, Alexander
last_name: Senichev
- first_name: Vladimir M.
full_name: Shalaev, Vladimir M.
last_name: Shalaev
- first_name: Alexandra
full_name: Boltasseva, Alexandra
last_name: Boltasseva
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Alexander V.
full_name: Kildishev, Alexander V.
last_name: Kildishev
citation:
ama: 'Farheen H, Chen Y, Chen P, et al. Topology-optimized silicon nitride coupler
for integrated single-photon emitters. In: Ni X, Cai W, eds. Photonic Computing:
From Materials and Devices to Systems and Applications II. SPIE; 2025. doi:10.1117/12.3065734'
apa: 'Farheen, H., Chen, Y., Chen, P., Kryvobok, A., Peana, S., Senichev, A., Shalaev,
V. M., Boltasseva, A., Förstner, J., & Kildishev, A. V. (2025). Topology-optimized
silicon nitride coupler for integrated single-photon emitters. In X. Ni &
W. Cai (Eds.), Photonic Computing: From Materials and Devices to Systems and
Applications II. SPIE. https://doi.org/10.1117/12.3065734'
bibtex: '@inproceedings{Farheen_Chen_Chen_Kryvobok_Peana_Senichev_Shalaev_Boltasseva_Förstner_Kildishev_2025,
title={Topology-optimized silicon nitride coupler for integrated single-photon
emitters}, DOI={10.1117/12.3065734},
booktitle={Photonic Computing: From Materials and Devices to Systems and Applications
II}, publisher={SPIE}, author={Farheen, Henna and Chen, Yuheng and Chen, Peigang
and Kryvobok, Artem and Peana, Samuel and Senichev, Alexander and Shalaev, Vladimir
M. and Boltasseva, Alexandra and Förstner, Jens and Kildishev, Alexander V.},
editor={Ni, Xingjie and Cai, Wenshan}, year={2025} }'
chicago: 'Farheen, Henna, Yuheng Chen, Peigang Chen, Artem Kryvobok, Samuel Peana,
Alexander Senichev, Vladimir M. Shalaev, Alexandra Boltasseva, Jens Förstner,
and Alexander V. Kildishev. “Topology-Optimized Silicon Nitride Coupler for Integrated
Single-Photon Emitters.” In Photonic Computing: From Materials and Devices
to Systems and Applications II, edited by Xingjie Ni and Wenshan Cai. SPIE,
2025. https://doi.org/10.1117/12.3065734.'
ieee: 'H. Farheen et al., “Topology-optimized silicon nitride coupler for
integrated single-photon emitters,” in Photonic Computing: From Materials and
Devices to Systems and Applications II, 2025, doi: 10.1117/12.3065734.'
mla: 'Farheen, Henna, et al. “Topology-Optimized Silicon Nitride Coupler for Integrated
Single-Photon Emitters.” Photonic Computing: From Materials and Devices to
Systems and Applications II, edited by Xingjie Ni and Wenshan Cai, SPIE, 2025,
doi:10.1117/12.3065734.'
short: 'H. Farheen, Y. Chen, P. Chen, A. Kryvobok, S. Peana, A. Senichev, V.M. Shalaev,
A. Boltasseva, J. Förstner, A.V. Kildishev, in: X. Ni, W. Cai (Eds.), Photonic
Computing: From Materials and Devices to Systems and Applications II, SPIE, 2025.'
date_created: 2025-10-08T15:20:13Z
date_updated: 2025-10-08T15:22:30Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '623'
doi: 10.1117/12.3065734
editor:
- first_name: Xingjie
full_name: Ni, Xingjie
last_name: Ni
- first_name: Wenshan
full_name: Cai, Wenshan
last_name: Cai
keyword:
- tet_topic_waveguide
language:
- iso: eng
publication: 'Photonic Computing: From Materials and Devices to Systems and Applications
II'
publication_status: published
publisher: SPIE
status: public
title: Topology-optimized silicon nitride coupler for integrated single-photon emitters
type: conference
user_id: '158'
year: '2025'
...
---
_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: '52700'
abstract:
- lang: eng
text: 'We explore the polarization hysteretic behaviour and field-dependent permittivity
of ferroelectric-dielectric 2D materials formed by random dispersions of low permittivity
inclusions in a ferroelectric matrix, using finite element simulations. We show
how the degree of impenetrability of dielectric inclusions plays a substantial
role in controlling the coercive field, remnant and saturation polarizations of
the homogenized materials. The results highlight the significance of the degree
of impenetrability of inclusion in tuning the effective polarization properties
of such ferroelectric composites: coercive field drops significantly as percolation
threshold is attained and remnant polarization decreases faster than a linear
decay.'
author:
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Pious Mathews
full_name: Mulavarickal Jose, Pious Mathews
last_name: Mulavarickal Jose
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Shafaq
full_name: Ejaz, Shafaq
last_name: Ejaz
- first_name: Christian
full_name: Brosseau, Christian
last_name: Brosseau
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Myroshnychenko V, Mulavarickal Jose PM, Farheen H, Ejaz S, Brosseau C, Förstner
J. From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric
butterfly shape in polarization loops. Physica Scripta. 2024;99(4):045952.
doi:10.1088/1402-4896/ad3172'
apa: 'Myroshnychenko, V., Mulavarickal Jose, P. M., Farheen, H., Ejaz, S., Brosseau,
C., & Förstner, J. (2024). From Swiss-cheese to discrete ferroelectric composites:
assessing the ferroelectric butterfly shape in polarization loops. Physica
Scripta, 99(4), 045952. https://doi.org/10.1088/1402-4896/ad3172'
bibtex: '@article{Myroshnychenko_Mulavarickal Jose_Farheen_Ejaz_Brosseau_Förstner_2024,
title={From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric
butterfly shape in polarization loops}, volume={99}, DOI={10.1088/1402-4896/ad3172},
number={4}, journal={Physica Scripta}, publisher={IOP Publishing}, author={Myroshnychenko,
Viktor and Mulavarickal Jose, Pious Mathews and Farheen, Henna and Ejaz, Shafaq
and Brosseau, Christian and Förstner, Jens}, year={2024}, pages={045952} }'
chicago: 'Myroshnychenko, Viktor, Pious Mathews Mulavarickal Jose, Henna Farheen,
Shafaq Ejaz, Christian Brosseau, and Jens Förstner. “From Swiss-Cheese to Discrete
Ferroelectric Composites: Assessing the Ferroelectric Butterfly Shape in Polarization
Loops.” Physica Scripta 99, no. 4 (2024): 045952. https://doi.org/10.1088/1402-4896/ad3172.'
ieee: 'V. Myroshnychenko, P. M. Mulavarickal Jose, H. Farheen, S. Ejaz, C. Brosseau,
and J. Förstner, “From Swiss-cheese to discrete ferroelectric composites: assessing
the ferroelectric butterfly shape in polarization loops,” Physica Scripta,
vol. 99, no. 4, p. 045952, 2024, doi: 10.1088/1402-4896/ad3172.'
mla: 'Myroshnychenko, Viktor, et al. “From Swiss-Cheese to Discrete Ferroelectric
Composites: Assessing the Ferroelectric Butterfly Shape in Polarization Loops.”
Physica Scripta, vol. 99, no. 4, IOP Publishing, 2024, p. 045952, doi:10.1088/1402-4896/ad3172.'
short: V. Myroshnychenko, P.M. Mulavarickal Jose, H. Farheen, S. Ejaz, C. Brosseau,
J. Förstner, Physica Scripta 99 (2024) 045952.
date_created: 2024-03-21T10:34:48Z
date_updated: 2024-07-22T07:43:53Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
doi: 10.1088/1402-4896/ad3172
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-03-21T10:39:32Z
date_updated: 2024-03-21T10:39:32Z
file_id: '52701'
file_name: 2024-03 Myroshnychenko - Physica Scripta - From Swiss-cheese to discrete
ferroelectric.pdf
file_size: 5386508
relation: main_file
file_date_updated: 2024-03-21T10:39:32Z
has_accepted_license: '1'
intvolume: ' 99'
issue: '4'
keyword:
- tet_topic_ferro
language:
- iso: eng
oa: '1'
page: '045952'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Physica Scripta
publication_identifier:
issn:
- 0031-8949
- 1402-4896
publication_status: published
publisher: IOP Publishing
status: public
title: 'From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric
butterfly shape in polarization loops'
type: journal_article
user_id: '158'
volume: 99
year: '2024'
...
---
_id: '55751'
abstract:
- lang: eng
text: Lateral leakage of TM modes in dielectric optical waveguides of rib/ridge
or strip-loaded types can be fully suppressed, if the waveguide core is formed
not through a strip that protrudes at one side (up) from the remaining lateral
guiding slab, but through parallel strips on both sides (up and down), such that
the resulting cross section becomes vertically symmetric. The fairly general arguments
underlying the leakage suppression apply to TM modes of all orders simultaneously,
and are independent of wavelength. These plus-shaped waveguides support strictly
guided, non-leaky TM modes for, in principle, arbitrarily shallow etching.
article_type: original
author:
- first_name: Necati
full_name: Üstün, Necati
last_name: Üstün
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Üstün N, Farheen H, Hammer M, Förstner J. Symmetry-protected TM modes in rib-like,
plus-shaped optical waveguides with shallow etching. Journal of the Optical
Society of America B. 2024;41(9):2077. doi:10.1364/josab.528729
apa: Üstün, N., Farheen, H., Hammer, M., & Förstner, J. (2024). Symmetry-protected
TM modes in rib-like, plus-shaped optical waveguides with shallow etching. Journal
of the Optical Society of America B, 41(9), 2077. https://doi.org/10.1364/josab.528729
bibtex: '@article{Üstün_Farheen_Hammer_Förstner_2024, title={Symmetry-protected
TM modes in rib-like, plus-shaped optical waveguides with shallow etching}, volume={41},
DOI={10.1364/josab.528729},
number={9}, journal={Journal of the Optical Society of America B}, publisher={Optica
Publishing Group}, author={Üstün, Necati and Farheen, Henna and Hammer, Manfred
and Förstner, Jens}, year={2024}, pages={2077} }'
chicago: 'Üstün, Necati, Henna Farheen, Manfred Hammer, and Jens Förstner. “Symmetry-Protected
TM Modes in Rib-like, plus-Shaped Optical Waveguides with Shallow Etching.” Journal
of the Optical Society of America B 41, no. 9 (2024): 2077. https://doi.org/10.1364/josab.528729.'
ieee: 'N. Üstün, H. Farheen, M. Hammer, and J. Förstner, “Symmetry-protected TM
modes in rib-like, plus-shaped optical waveguides with shallow etching,” Journal
of the Optical Society of America B, vol. 41, no. 9, p. 2077, 2024, doi: 10.1364/josab.528729.'
mla: Üstün, Necati, et al. “Symmetry-Protected TM Modes in Rib-like, plus-Shaped
Optical Waveguides with Shallow Etching.” Journal of the Optical Society of
America B, vol. 41, no. 9, Optica Publishing Group, 2024, p. 2077, doi:10.1364/josab.528729.
short: N. Üstün, H. Farheen, M. Hammer, J. Förstner, Journal of the Optical Society
of America B 41 (2024) 2077.
date_created: 2024-08-25T10:24:58Z
date_updated: 2024-08-25T10:48:42Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
doi: 10.1364/josab.528729
file:
- access_level: local
content_type: application/pdf
creator: fossie
date_created: 2024-08-25T10:30:28Z
date_updated: 2024-08-25T10:30:28Z
file_id: '55752'
file_name: 2024-08 Farheen - JOSA B - Symmetry-protected TM modes in rib-like, plus-shaped
optical waveguides with shallow etching.pdf
file_size: 920206
relation: main_file
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-08-25T10:48:05Z
date_updated: 2024-08-25T10:48:05Z
file_id: '55753'
file_name: 2024-08 Farheen - JOSA B - Symmetry-protected TM modes in rib-like, plus-shaped
optical waveguides with shallow etching (preprint).pdf
file_size: 931810
relation: main_file
title: (preprint)
file_date_updated: 2024-08-25T10:48:05Z
has_accepted_license: '1'
intvolume: ' 41'
issue: '9'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: '2077'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
publication: Journal of the Optical Society of America B
publication_identifier:
issn:
- 0740-3224
- 1520-8540
publication_status: published
publisher: Optica Publishing Group
status: public
title: Symmetry-protected TM modes in rib-like, plus-shaped optical waveguides with
shallow etching
type: journal_article
user_id: '158'
volume: 41
year: '2024'
...
---
_id: '55989'
abstract:
- lang: eng
text: Phased arrays are vital in communication systems and have received significant
interest in the field of optoelectronics and photonics, enabling a wide range
of applications such as LiDAR, holography, wireless communication, etc. In this
work, we present a blazed grating antenna that is optimized to have upward radiation
efficiency as high as 80% with a compact footprint of 3.5 μm × 2 μm at an operational
wavelength of 1.55 μm. Our numerical investigations demonstrate that this antenna
in a 64 × 64 phased array configuration is capable of producing desired far-field
radiation patterns. Additionally, our antenna possesses a low side lobe level
of -9.7 dB and a negligible reflection efficiency of under 1%, making it an attractive
candidate for integrated optical phased arrays.
article_type: original
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Suraj
full_name: Joshi, Suraj
last_name: Joshi
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. An efficient
compact blazed grating antenna for optical phased arrays. Journal of Physics:
Photonics. 2024;6:045010. doi:10.1088/2515-7647/ad6ed4'
apa: 'Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., & Förstner,
J. (2024). An efficient compact blazed grating antenna for optical phased arrays.
Journal of Physics: Photonics, 6, 045010. https://doi.org/10.1088/2515-7647/ad6ed4'
bibtex: '@article{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2024, title={An
efficient compact blazed grating antenna for optical phased arrays}, volume={6},
DOI={10.1088/2515-7647/ad6ed4},
journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Farheen,
Henna and Joshi, Suraj and Scheytt, J. Christoph and Myroshnychenko, Viktor and
Förstner, Jens}, year={2024}, pages={045010} }'
chicago: 'Farheen, Henna, Suraj Joshi, J. Christoph Scheytt, Viktor Myroshnychenko,
and Jens Förstner. “An Efficient Compact Blazed Grating Antenna for Optical Phased
Arrays.” Journal of Physics: Photonics 6 (2024): 045010. https://doi.org/10.1088/2515-7647/ad6ed4.'
ieee: 'H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
“An efficient compact blazed grating antenna for optical phased arrays,” Journal
of Physics: Photonics, vol. 6, p. 045010, 2024, doi: 10.1088/2515-7647/ad6ed4.'
mla: 'Farheen, Henna, et al. “An Efficient Compact Blazed Grating Antenna for Optical
Phased Arrays.” Journal of Physics: Photonics, vol. 6, IOP Publishing,
2024, p. 045010, doi:10.1088/2515-7647/ad6ed4.'
short: 'H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal
of Physics: Photonics 6 (2024) 045010.'
date_created: 2024-09-02T12:08:18Z
date_updated: 2024-09-02T12:23:55Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
- _id: '58'
doi: 10.1088/2515-7647/ad6ed4
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2024-09-02T12:13:55Z
date_updated: 2024-09-02T12:13:55Z
file_id: '55990'
file_name: 2024-08 Farheen - JPhys Photonics - An efficient compact blazed grating
antenna for optical phased arrays (official version).pdf
file_size: 1492402
relation: main_file
file_date_updated: 2024-09-02T12:13:55Z
has_accepted_license: '1'
intvolume: ' 6'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
oa: '1'
page: '045010'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 'Journal of Physics: Photonics'
publication_identifier:
issn:
- 2515-7647
publication_status: published
publisher: IOP Publishing
status: public
title: An efficient compact blazed grating antenna for optical phased arrays
type: journal_article
user_id: '158'
volume: 6
year: '2024'
...
---
_id: '56193'
abstract:
- lang: eng
text: 'Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media
are consid-ered, for operation in the linear regime. We outline and implement
a largely analytic procedure forrigorous modal analysis of three-layer slabs with
birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem
separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in
X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant
TE or TM polarization, and with effective indices that depend on the propagation
directionof the modes, relative to the crystal axes. Strong hybridization can
be observed for near degeneratemodes in singular configurations without vertical
symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same
symmetry class. Dispersion curves for slab thickness and propa-gation angle are
discussed, for slabs with oxide and air cover. '
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Farheen H, Förstner J. Guided modes of thin-film lithium niobate
slabs. Optics Continuum. Published online 2024:532822. doi:10.1364/optcon.532822
apa: Hammer, M., Farheen, H., & Förstner, J. (2024). Guided modes of thin-film
lithium niobate slabs. Optics Continuum, 532822. https://doi.org/10.1364/optcon.532822
bibtex: '@article{Hammer_Farheen_Förstner_2024, title={Guided modes of thin-film
lithium niobate slabs}, DOI={10.1364/optcon.532822},
journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer,
Manfred and Farheen, Henna and Förstner, Jens}, year={2024}, pages={532822} }'
chicago: Hammer, Manfred, Henna Farheen, and Jens Förstner. “Guided Modes of Thin-Film
Lithium Niobate Slabs.” Optics Continuum, 2024, 532822. https://doi.org/10.1364/optcon.532822.
ieee: 'M. Hammer, H. Farheen, and J. Förstner, “Guided modes of thin-film lithium
niobate slabs,” Optics Continuum, p. 532822, 2024, doi: 10.1364/optcon.532822.'
mla: Hammer, Manfred, et al. “Guided Modes of Thin-Film Lithium Niobate Slabs.”
Optics Continuum, Optica Publishing Group, 2024, p. 532822, doi:10.1364/optcon.532822.
short: M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.
date_created: 2024-09-21T09:17:16Z
date_updated: 2024-11-04T17:07:27Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1364/optcon.532822
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2024-11-04T17:05:30Z
date_updated: 2024-11-04T17:05:30Z
file_id: '56864'
file_name: 2024-11 Hammer - Optics Continuum - Guided modes of thin-film lithium
niobate slabs.pdf
file_size: 4399685
relation: main_file
success: 1
file_date_updated: 2024-11-04T17:05:30Z
has_accepted_license: '1'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: '532822'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
Konzepten zu funktionellen Strukturen'
publication: Optics Continuum
publication_identifier:
issn:
- 2770-0208
publication_status: published
publisher: Optica Publishing Group
status: public
title: Guided modes of thin-film lithium niobate slabs
type: journal_article
user_id: '158'
year: '2024'
...
---
_id: '57528'
abstract:
- lang: eng
text: Based on the surface equivalence principle an equivalent near-field source
can be determined by measurements with a near-field scanner. One application is
to use the source to simulate the interferences of the device-under-test with
other objects in its close environment. Due to a limited signal-to-noise ratio
in practical applications, noise adds to the near-field source. Hence, noise effects
affect the quality of the simulation results and cause uncertainties. The influence
of the noise effects is investigated by a simulative approach with artificially
added noise. Two test devices with different a geometric dimension, operating
frequency and excited power are evaluated for different characteristics and signal-to-noise
ratios to assess the impact of the simulation results. Finally, in a combined
simulation an equivalent near-field source will disturb an IoT-device and the
voltages at two resistors on the device are examined.
author:
- first_name: Dominik
full_name: Schröder, Dominik
last_name: Schröder
- first_name: Ulrich
full_name: Kiefner, Ulrich
last_name: Kiefner
- first_name: Christian
full_name: Hedayat, Christian
last_name: Hedayat
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Schröder D, Kiefner U, Hedayat C, Förstner J. Evaluation of Measurement Noise
Effects in the Close Environment of Equivalent Near-Field Sources. In: 2024
International Symposium on Electromagnetic Compatibility – EMC Europe. IEEE;
2024. doi:10.1109/emceurope59828.2024.10722220'
apa: Schröder, D., Kiefner, U., Hedayat, C., & Förstner, J. (2024). Evaluation
of Measurement Noise Effects in the Close Environment of Equivalent Near-Field
Sources. 2024 International Symposium on Electromagnetic Compatibility – EMC
Europe. https://doi.org/10.1109/emceurope59828.2024.10722220
bibtex: '@inproceedings{Schröder_Kiefner_Hedayat_Förstner_2024, title={Evaluation
of Measurement Noise Effects in the Close Environment of Equivalent Near-Field
Sources}, DOI={10.1109/emceurope59828.2024.10722220},
booktitle={2024 International Symposium on Electromagnetic Compatibility – EMC
Europe}, publisher={IEEE}, author={Schröder, Dominik and Kiefner, Ulrich and Hedayat,
Christian and Förstner, Jens}, year={2024} }'
chicago: Schröder, Dominik, Ulrich Kiefner, Christian Hedayat, and Jens Förstner.
“Evaluation of Measurement Noise Effects in the Close Environment of Equivalent
Near-Field Sources.” In 2024 International Symposium on Electromagnetic Compatibility
– EMC Europe. IEEE, 2024. https://doi.org/10.1109/emceurope59828.2024.10722220.
ieee: 'D. Schröder, U. Kiefner, C. Hedayat, and J. Förstner, “Evaluation of Measurement
Noise Effects in the Close Environment of Equivalent Near-Field Sources,” 2024,
doi: 10.1109/emceurope59828.2024.10722220.'
mla: Schröder, Dominik, et al. “Evaluation of Measurement Noise Effects in the Close
Environment of Equivalent Near-Field Sources.” 2024 International Symposium
on Electromagnetic Compatibility – EMC Europe, IEEE, 2024, doi:10.1109/emceurope59828.2024.10722220.
short: 'D. Schröder, U. Kiefner, C. Hedayat, J. Förstner, in: 2024 International
Symposium on Electromagnetic Compatibility – EMC Europe, IEEE, 2024.'
date_created: 2024-11-30T17:54:35Z
date_updated: 2024-11-30T19:30:59Z
department:
- _id: '61'
doi: 10.1109/emceurope59828.2024.10722220
keyword:
- tet_topic_hf
- tet_enas
language:
- iso: eng
publication: 2024 International Symposium on Electromagnetic Compatibility – EMC Europe
publication_status: published
publisher: IEEE
status: public
title: Evaluation of Measurement Noise Effects in the Close Environment of Equivalent
Near-Field Sources
type: conference
user_id: '158'
year: '2024'
...
---
_id: '48599'
abstract:
- lang: eng
text: AbstractThe biexciton‐exciton emission cascade
commonly used in quantum‐dot systems to generate polarization entanglement yields
photons with intrinsically limited indistinguishability. In the present work,
it focuses on the generation of pairs of photons with high degrees of polarization
entanglement and simultaneously high indistinguishability. It achieves this goal
by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates
that a suitably tailored circular Bragg reflector fulfills the requirements of
sufficient selective Purcell enhancement of biexciton emission paired with spectrally
broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical
study combines (i) the optimization of realistic photonic structures solving Maxwell's
equations from which model parameters are extracted as input for (ii) microscopic
simulations of quantum‐dot cavity excitation dynamics with full access to photon
properties. It reports non‐trivial dependencies on system parameters and use the
predictive power of the combined theoretical approach to determine the optimal
range of Purcell enhancement that maximizes indistinguishability and entanglement
to near unity values, here specifically for the telecom C‐band at 1550 nm.
author:
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Dustin
full_name: Siebert, Dustin
last_name: Siebert
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On‐Demand Indistinguishable
and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies.
Published online 2023. doi:10.1002/qute.202300142
apa: Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023).
On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.
Advanced Quantum Technologies. https://doi.org/10.1002/qute.202300142
bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand
Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, DOI={10.1002/qute.202300142}, journal={Advanced
Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin
and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }'
chicago: Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher.
“On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.”
Advanced Quantum Technologies, 2023. https://doi.org/10.1002/qute.202300142.
ieee: 'D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On‐Demand
Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” Advanced
Quantum Technologies, 2023, doi: 10.1002/qute.202300142.'
mla: Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using
Tailored Cavity Designs.” Advanced Quantum Technologies, Wiley, 2023, doi:10.1002/qute.202300142.
short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, Advanced Quantum
Technologies (2023).
date_created: 2023-11-03T10:07:38Z
date_updated: 2023-12-21T10:41:17Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '623'
doi: 10.1002/qute.202300142
keyword:
- tet_topic_qd
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/10.1002/qute.202300142
oa: '1'
project:
- _id: '173'
grant_number: '231447078'
name: 'TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
bei Telekom Wellenlängen (C09*)'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Advanced Quantum Technologies
publication_identifier:
issn:
- 2511-9044
- 2511-9044
publication_status: published
publisher: Wiley
related_material:
record:
- id: '43246'
relation: earlier_version
status: public
status: public
title: On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs
type: journal_article
user_id: '158'
year: '2023'
...
---
_id: '43246'
abstract:
- lang: eng
text: The biexciton-exciton emission cascade commonly used in quantum-dot systems
to generate polarization entanglement yields photons with intrinsically limited
indistinguishability. In the present work we focus on the generation of pairs
of photons with high degrees of polarization entanglement and simultaneously high
indistinguishibility. We achieve this goal by selectively reducing the biexciton
lifetime with an optical resonator. We demonstrate that a suitably tailored circular
Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement
of biexciton emission paired with spectrally broad photon extraction and two-fold
degenerate optical modes. Our in-depth theoretical study combines (i) the optimization
of realistic photonic structures solving Maxwell's equations from which model
parameters are extracted as input for (ii) microscopic simulations of quantum-dot
cavity excitation dynamics with full access to photon properties. We report non-trivial
dependencies on system parameters and use the predictive power of our combined
theoretical approach to determine the optimal range of Purcell enhancement that
maximizes indistinguishability and entanglement to near unity values in the telecom
C-band at $1550\,\mathrm{nm}$.
author:
- first_name: David
full_name: Bauch, David
last_name: Bauch
- first_name: Dustin
full_name: Siebert, Dustin
last_name: Siebert
- first_name: Klaus
full_name: Jöns, Klaus
id: '85353'
last_name: Jöns
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- first_name: Stefan
full_name: Schumacher, Stefan
id: '27271'
last_name: Schumacher
orcid: 0000-0003-4042-4951
citation:
ama: Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On-demand indistinguishable
and entangled photons at telecom frequencies using tailored cavity designs. Published
online 2023.
apa: Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023).
On-demand indistinguishable and entangled photons at telecom frequencies using
tailored cavity designs.
bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On-demand
indistinguishable and entangled photons at telecom frequencies using tailored
cavity designs}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and
Förstner, Jens and Schumacher, Stefan}, year={2023} }'
chicago: Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher.
“On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using
Tailored Cavity Designs,” 2023.
ieee: D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On-demand
indistinguishable and entangled photons at telecom frequencies using tailored
cavity designs.” 2023.
mla: Bauch, David, et al. On-Demand Indistinguishable and Entangled Photons at
Telecom Frequencies Using Tailored Cavity Designs. 2023.
short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, (2023).
date_created: 2023-03-31T13:22:05Z
date_updated: 2023-12-21T10:41:17Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '623'
- _id: '15'
- _id: '35'
- _id: '170'
- _id: '297'
keyword:
- tet_topic_phc
- tet_topic_qd
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2303.13871.pdf
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '173'
grant_number: '231447078'
name: 'TRR 142 - C09: TRR 142 - Subproject C09'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Subproject B06'
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
related_material:
record:
- id: '48599'
relation: later_version
status: public
status: public
title: On-demand indistinguishable and entangled photons at telecom frequencies using
tailored cavity designs
type: preprint
user_id: '16199'
year: '2023'
...
---
_id: '50012'
abstract:
- lang: eng
text: Silicon photonics, in conjunction with complementary metal-oxide-semiconductor
(CMOS) fabrication, has greatly enhanced the development of integrated optical
phased arrays. This facilitates a dynamic control of light in a compact form factor
that enables the synthesis of arbitrary complex wavefronts in the infrared spectrum.
We numerically demonstrate a large-scale two-dimensional silicon-based optical
phased array (OPA) composed of nanoantennas with circular gratings that are balanced
in power and aligned in phase, required for producing elegant radiation patterns
in the far-field. For a wavelength of 1.55 μm, we optimize two antennas for the
OPA exhibiting an upward radiation efficiency as high as 90%, with almost 6.8%
of optical power concentrated in the field of view. Additionally, we believe that
the proposed OPAs can be easily fabricated and would have the ability to generate
complex holographic images, rendering them an attractive candidate for a wide
range of applications like LiDAR sensors, optical trapping, optogenetic stimulation,
and augmented-reality displays.
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Andreas
full_name: Strauch, Andreas
last_name: Strauch
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized,
Highly Efficient Silicon Antennas for Optical Phased Arrays. Photonics and
Nanostructures - Fundamentals and Applications. 2023;58:101207. doi:10.1016/j.photonics.2023.101207
apa: Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., & Förstner,
J. (2023). Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.
Photonics and Nanostructures - Fundamentals and Applications, 58,
101207. https://doi.org/10.1016/j.photonics.2023.101207
bibtex: '@article{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized,
Highly Efficient Silicon Antennas for Optical Phased Arrays}, volume={58}, DOI={10.1016/j.photonics.2023.101207},
journal={Photonics and Nanostructures - Fundamentals and Applications}, publisher={Elsevier
BV}, author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and
Myroshnychenko, Viktor and Förstner, Jens}, year={2023}, pages={101207} }'
chicago: 'Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko,
and Jens Förstner. “Optimized, Highly Efficient Silicon Antennas for Optical Phased
Arrays.” Photonics and Nanostructures - Fundamentals and Applications 58
(2023): 101207. https://doi.org/10.1016/j.photonics.2023.101207.'
ieee: 'H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
“Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays,” Photonics
and Nanostructures - Fundamentals and Applications, vol. 58, p. 101207, 2023,
doi: 10.1016/j.photonics.2023.101207.'
mla: Farheen, Henna, et al. “Optimized, Highly Efficient Silicon Antennas for Optical
Phased Arrays.” Photonics and Nanostructures - Fundamentals and Applications,
vol. 58, Elsevier BV, 2023, p. 101207, doi:10.1016/j.photonics.2023.101207.
short: H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Photonics
and Nanostructures - Fundamentals and Applications 58 (2023) 101207.
date_created: 2023-12-21T09:30:03Z
date_updated: 2024-07-22T07:44:33Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '58'
doi: 10.1016/j.photonics.2023.101207
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2023-12-21T09:34:17Z
date_updated: 2023-12-21T09:34:17Z
file_id: '50013'
file_name: 2ß23-12 Farheen - PNFA - Optimized, highly efficient silicon antennas
for optical phased arrays.pdf
file_size: 3339442
relation: main_file
file_date_updated: 2023-12-21T09:34:17Z
has_accepted_license: '1'
intvolume: ' 58'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
oa: '1'
page: '101207'
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Photonics and Nanostructures - Fundamentals and Applications
publication_identifier:
issn:
- 1569-4410
publication_status: published
publisher: Elsevier BV
related_material:
link:
- relation: research_data
url: https://doi.org/10.5281/zenodo.10044122
status: public
title: Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays
type: journal_article
user_id: '158'
volume: 58
year: '2023'
...
---
_id: '43245'
abstract:
- lang: eng
text: High-contrast slab waveguide Bragg gratings with 1D periodicity are investigated.
For specific oblique excitation by semi-guided waves at sufficiently high angles
of incidence, the idealized structures do not exhibit any radiative losses, such
that reflectance and transmittance for the single port mode add strictly up to
one. We consider a series of symmetric, fully and partly etched finite gratings,
for parameters found in integrated silicon photonics. These can act as spectral
filters with a reasonably flattop response. Apodization can lead to more box shaped
reflectance and transmittance spectra. Together with a narrowband Fabry–Perot
filter, these configurations are characterized by reflection bands, or transmittance
peaks, with widths that span three orders of magnitude.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Farheen H, Förstner J. How to suppress radiative losses in high-contrast
integrated Bragg gratings. Journal of the Optical Society of America B.
2023;40(4):862. doi:10.1364/josab.485725
apa: Hammer, M., Farheen, H., & Förstner, J. (2023). How to suppress radiative
losses in high-contrast integrated Bragg gratings. Journal of the Optical Society
of America B, 40(4), 862. https://doi.org/10.1364/josab.485725
bibtex: '@article{Hammer_Farheen_Förstner_2023, title={How to suppress radiative
losses in high-contrast integrated Bragg gratings}, volume={40}, DOI={10.1364/josab.485725},
number={4}, journal={Journal of the Optical Society of America B}, publisher={Optica
Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens},
year={2023}, pages={862} }'
chicago: 'Hammer, Manfred, Henna Farheen, and Jens Förstner. “How to Suppress Radiative
Losses in High-Contrast Integrated Bragg Gratings.” Journal of the Optical
Society of America B 40, no. 4 (2023): 862. https://doi.org/10.1364/josab.485725.'
ieee: 'M. Hammer, H. Farheen, and J. Förstner, “How to suppress radiative losses
in high-contrast integrated Bragg gratings,” Journal of the Optical Society
of America B, vol. 40, no. 4, p. 862, 2023, doi: 10.1364/josab.485725.'
mla: Hammer, Manfred, et al. “How to Suppress Radiative Losses in High-Contrast
Integrated Bragg Gratings.” Journal of the Optical Society of America B,
vol. 40, no. 4, Optica Publishing Group, 2023, p. 862, doi:10.1364/josab.485725.
short: M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America
B 40 (2023) 862.
date_created: 2023-03-31T13:04:43Z
date_updated: 2024-07-22T07:44:38Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1364/josab.485725
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2023-03-31T13:14:59Z
date_updated: 2023-03-31T13:14:59Z
file_id: '43247'
file_name: ogr-afterreview.pdf
file_size: 1982311
relation: main_file
file_date_updated: 2023-03-31T13:14:59Z
has_accepted_license: '1'
intvolume: ' 40'
issue: '4'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: '862'
project:
- _id: '53'
grant_number: '231447078'
name: 'TRR 142: TRR 142'
- _id: '55'
name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Subproject B06'
publication: Journal of the Optical Society of America B
publication_identifier:
issn:
- 0740-3224
- 1520-8540
publication_status: published
publisher: Optica Publishing Group
status: public
title: How to suppress radiative losses in high-contrast integrated Bragg gratings
type: journal_article
user_id: '158'
volume: 40
year: '2023'
...
---
_id: '43052'
abstract:
- lang: eng
text: We demonstrate a large-scale two dimensional silicon-based optical phased
array (OPA) composed of nanoantennas with circular gratings that are balanced
in power and aligned in phase, required for producing desired radiation patterns
in the far-field. The OPAs are numerically optimized to have an upward efficiency
of up to 90%, targeting radiation concentration mainly in the field of view. We
envision that our OPAs have the ability of generating complex holographic images,
rendering them an attractive candidate for a wide range of applications like LiDAR
sensors, optical trapping, optogenetic stimulation and augmented-reality displays.
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: Andreas
full_name: Strauch, Andreas
last_name: Strauch
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: https://orcid.org/0000-0002-5950-6618
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized
silicon antennas for optical phased arrays. In: García-Blanco SM, Cheben P, eds.
Integrated Optics: Devices, Materials, and Technologies XXVII. SPIE; 2023:124241D.
doi:10.1117/12.2658716'
apa: 'Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., & Förstner,
J. (2023). Optimized silicon antennas for optical phased arrays. In S. M. García-Blanco
& P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies
XXVII (p. 124241D). SPIE. https://doi.org/10.1117/12.2658716'
bibtex: '@inproceedings{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized
silicon antennas for optical phased arrays}, DOI={10.1117/12.2658716},
booktitle={Integrated Optics: Devices, Materials, and Technologies XXVII}, publisher={SPIE},
author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and Myroshnychenko,
Viktor and Förstner, Jens}, editor={García-Blanco, Sonia M. and Cheben, Pavel},
year={2023}, pages={124241D} }'
chicago: 'Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko,
and Jens Förstner. “Optimized Silicon Antennas for Optical Phased Arrays.” In
Integrated Optics: Devices, Materials, and Technologies XXVII, edited by
Sonia M. García-Blanco and Pavel Cheben, 124241D. SPIE, 2023. https://doi.org/10.1117/12.2658716.'
ieee: 'H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
“Optimized silicon antennas for optical phased arrays,” in Integrated Optics:
Devices, Materials, and Technologies XXVII, 2023, p. 124241D, doi: 10.1117/12.2658716.'
mla: 'Farheen, Henna, et al. “Optimized Silicon Antennas for Optical Phased Arrays.”
Integrated Optics: Devices, Materials, and Technologies XXVII, edited by
Sonia M. García-Blanco and Pavel Cheben, SPIE, 2023, p. 124241D, doi:10.1117/12.2658716.'
short: 'H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in:
S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and
Technologies XXVII, SPIE, 2023, p. 124241D.'
date_created: 2023-03-21T12:35:18Z
date_updated: 2024-07-22T07:44:46Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1117/12.2658716
editor:
- first_name: Sonia M.
full_name: García-Blanco, Sonia M.
last_name: García-Blanco
- first_name: Pavel
full_name: Cheben, Pavel
last_name: Cheben
file:
- access_level: request
content_type: application/pdf
creator: fossie
date_created: 2023-03-22T07:41:49Z
date_updated: 2023-03-22T20:53:11Z
file_id: '43055'
file_name: 2023-01 Poster Photonics West Henna OPA_A0.pdf
file_size: 1747396
relation: main_file
file_date_updated: 2023-03-22T20:53:11Z
has_accepted_license: '1'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
page: '124241D '
publication: 'Integrated Optics: Devices, Materials, and Technologies XXVII'
publication_status: published
publisher: SPIE
status: public
title: Optimized silicon antennas for optical phased arrays
type: conference
user_id: '158'
year: '2023'
...
---
_id: '50466'
abstract:
- lang: eng
text: A key challenge in designing efficient optical phased arrays is the lack of
a well-designed radiator. This work explores horn antennas numerically optimized
to target high upward radiation efficiency to be employed in silicon-based phased
arrays capable of producing elegant radiation patterns in the far-field.
author:
- first_name: Henna
full_name: Farheen, Henna
id: '53444'
last_name: Farheen
orcid: 0000-0001-7730-3489
- first_name: S.
full_name: Joshi, S.
last_name: Joshi
- first_name: J. Christoph
full_name: Scheytt, J. Christoph
id: '37144'
last_name: Scheytt
orcid: '0000-0002-5950-6618 '
- first_name: Viktor
full_name: Myroshnychenko, Viktor
id: '46371'
last_name: Myroshnychenko
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. Increasing the
upward radiation efficiency of optical phased arrays using asymmetric silicon
horn antennas. In: 2023 IEEE Photonics Conference (IPC). IEEE; 2023. doi:10.1109/ipc57732.2023.10360519'
apa: Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., & Förstner,
J. (2023). Increasing the upward radiation efficiency of optical phased arrays
using asymmetric silicon horn antennas. 2023 IEEE Photonics Conference (IPC).
https://doi.org/10.1109/ipc57732.2023.10360519
bibtex: '@inproceedings{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2023, title={Increasing
the upward radiation efficiency of optical phased arrays using asymmetric silicon
horn antennas}, DOI={10.1109/ipc57732.2023.10360519},
booktitle={2023 IEEE Photonics Conference (IPC)}, publisher={IEEE}, author={Farheen,
Henna and Joshi, S. and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner,
Jens}, year={2023} }'
chicago: Farheen, Henna, S. Joshi, J. Christoph Scheytt, Viktor Myroshnychenko,
and Jens Förstner. “Increasing the Upward Radiation Efficiency of Optical Phased
Arrays Using Asymmetric Silicon Horn Antennas.” In 2023 IEEE Photonics Conference
(IPC). IEEE, 2023. https://doi.org/10.1109/ipc57732.2023.10360519.
ieee: 'H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
“Increasing the upward radiation efficiency of optical phased arrays using asymmetric
silicon horn antennas,” 2023, doi: 10.1109/ipc57732.2023.10360519.'
mla: Farheen, Henna, et al. “Increasing the Upward Radiation Efficiency of Optical
Phased Arrays Using Asymmetric Silicon Horn Antennas.” 2023 IEEE Photonics
Conference (IPC), IEEE, 2023, doi:10.1109/ipc57732.2023.10360519.
short: 'H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in:
2023 IEEE Photonics Conference (IPC), IEEE, 2023.'
date_created: 2024-01-12T07:37:54Z
date_updated: 2024-07-22T07:48:53Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1109/ipc57732.2023.10360519
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
project:
- _id: '266'
grant_number: PROFILNRW-2020-067
name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
grant_number: '231447078'
name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
eines photonischen Quantensystems (B06*)'
- _id: '75'
grant_number: '231447078'
name: 'TRR 142 - C05: TRR 142 - Nichtlineare optische Oberflächen basierend auf
ZnO-plasmonischen Hybrid-Nanostrukturen (C05)'
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 2023 IEEE Photonics Conference (IPC)
publication_status: published
publisher: IEEE
status: public
title: Increasing the upward radiation efficiency of optical phased arrays using asymmetric
silicon horn antennas
type: conference
user_id: '158'
year: '2023'
...