---
_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: '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: '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: '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: '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: '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: '30387'
abstract:
- lang: eng
text: Resonant evanescent coupling can be utilized to selectively excite orbital
angular momentum (OAM) modes of high angular order supported by a thin circular
dielectric rod. Our 2.5-D hybrid-analytical coupled mode model combines the vectorial
fields associated with the fundamental TE- and TM-modes of a standard silicon
photonics slab waveguide, propagating at oblique angles with respect to the rod
axis, and the hybrid modes supported by the rod. One observes an efficient resonant
interaction in cases where the common axial wavenumber of the waves in the slab
matches the propagation constant of one or more modes of the rod. For certain
modes of high angular order, the incident wave is able to transfer its directionality
to the field in the fiber, exciting effectively only one of a pair of degenerate
OAM modes
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Hammer M, Ebers L, Förstner J. Resonant evanescent excitation of OAM modes
in a high-contrast circular step-index fiber. In: Andrews DL, Galvez EJ, Rubinsztein-Dunlop
H, eds. Complex Light and Optical Forces XVI. SPIE; 2022:120170F. doi:10.1117/12.2612179'
apa: Hammer, M., Ebers, L., & Förstner, J. (2022). Resonant evanescent excitation
of OAM modes in a high-contrast circular step-index fiber. In D. L. Andrews, E.
J. Galvez, & H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces
XVI (p. 120170F). SPIE. https://doi.org/10.1117/12.2612179
bibtex: '@inproceedings{Hammer_Ebers_Förstner_2022, title={Resonant evanescent excitation
of OAM modes in a high-contrast circular step-index fiber}, DOI={10.1117/12.2612179},
booktitle={Complex Light and Optical Forces XVI}, publisher={SPIE}, author={Hammer,
Manfred and Ebers, Lena and Förstner, Jens}, editor={Andrews, David L. and Galvez,
Enrique J. and Rubinsztein-Dunlop, Halina}, year={2022}, pages={120170F} }'
chicago: Hammer, Manfred, Lena Ebers, and Jens Förstner. “Resonant Evanescent Excitation
of OAM Modes in a High-Contrast Circular Step-Index Fiber.” In Complex Light
and Optical Forces XVI, edited by David L. Andrews, Enrique J. Galvez, and
Halina Rubinsztein-Dunlop, 120170F. SPIE, 2022. https://doi.org/10.1117/12.2612179.
ieee: 'M. Hammer, L. Ebers, and J. Förstner, “Resonant evanescent excitation of
OAM modes in a high-contrast circular step-index fiber,” in Complex Light and
Optical Forces XVI, 2022, p. 120170F, doi: 10.1117/12.2612179.'
mla: Hammer, Manfred, et al. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast
Circular Step-Index Fiber.” Complex Light and Optical Forces XVI, edited
by David L. Andrews et al., SPIE, 2022, p. 120170F, doi:10.1117/12.2612179.
short: 'M. Hammer, L. Ebers, J. Förstner, in: D.L. Andrews, E.J. Galvez, H. Rubinsztein-Dunlop
(Eds.), Complex Light and Optical Forces XVI, SPIE, 2022, p. 120170F.'
date_created: 2022-03-21T10:12:58Z
date_updated: 2022-03-22T18:04:20Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1117/12.2612179
editor:
- first_name: David L.
full_name: Andrews, David L.
last_name: Andrews
- first_name: Enrique J.
full_name: Galvez, Enrique J.
last_name: Galvez
- first_name: Halina
full_name: Rubinsztein-Dunlop, Halina
last_name: Rubinsztein-Dunlop
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2022-03-22T18:03:50Z
date_updated: 2022-03-22T18:03:50Z
file_id: '30444'
file_name: 2022-03 Hammer - SPIE Photonics West 2022 - Resonant evanescent excitation
of OAM modes in a high-contrast circular (official version).pdf
file_size: 2015899
relation: main_file
file_date_updated: 2022-03-22T18:03:50Z
has_accepted_license: '1'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: 120170F
project:
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '53'
name: 'TRR 142: TRR 142'
- _id: '75'
name: 'TRR 142 - C5: TRR 142 - Subproject C5'
publication: Complex Light and Optical Forces XVI
publication_status: published
publisher: SPIE
status: public
title: Resonant evanescent excitation of OAM modes in a high-contrast circular step-index
fiber
type: conference
user_id: '158'
year: '2022'
...
---
_id: '35128'
abstract:
- lang: eng
text: Here we demonstrate a new, to the best of our knowledge, type of 3-dB coupler
that has an ultra-broadband operational range from 1300 to 1600 nm with low fabrication
sensitivity. The overall device size is 800 µm including in/out S-bend waveguides.
The coupler is an asymmetric non-uniform directional coupler that consists of
two tapered waveguides. One of the coupler arms is shifted by 100 µm in the propagation
direction, which results in a more wavelength-insensitive 3-dB response compared
to a standard (not shifted) coupler. Moreover, compared to a long adiabatic coupler,
we achieved a similar wavelength response at a 16-times-smaller device length.
The couplers were fabricated using the silicon nitride platform of Lionix International.
We also experimentally demonstrated an optical switch that is made by using two
of these couplers in a Mach–Zehnder interferometer configuration. According to
experimental results, this optical switch exhibits –10 dB of extinction ratio
over the 1500–1600 nm wavelength range. Our results indicate that this new type
of coupler holds great promise for various applications, including optical imaging,
telecommunications, and reconfigurable photonic processors where compact, fabrication-tolerant,
and wavelength-insensitive couplers are essential.
author:
- first_name: Hamed
full_name: Nikbakht, Hamed
last_name: Nikbakht
- first_name: Mohammad Talebi
full_name: Khoshmehr, Mohammad Talebi
last_name: Khoshmehr
- first_name: Bob
full_name: van Someren, Bob
last_name: van Someren
- first_name: Dieter
full_name: Teichrib, Dieter
last_name: Teichrib
- 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
- first_name: B. Imran
full_name: Akca, B. Imran
last_name: Akca
citation:
ama: Nikbakht H, Khoshmehr MT, van Someren B, et al. Asymmetric, non-uniform 3-dB
directional coupler with 300-nm bandwidth and a small footprint. Optics Letters.
2022;48(2):207. doi:10.1364/ol.476537
apa: Nikbakht, H., Khoshmehr, M. T., van Someren, B., Teichrib, D., Hammer, M.,
Förstner, J., & Akca, B. I. (2022). Asymmetric, non-uniform 3-dB directional
coupler with 300-nm bandwidth and a small footprint. Optics Letters, 48(2),
207. https://doi.org/10.1364/ol.476537
bibtex: '@article{Nikbakht_Khoshmehr_van Someren_Teichrib_Hammer_Förstner_Akca_2022,
title={Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth
and a small footprint}, volume={48}, DOI={10.1364/ol.476537},
number={2}, journal={Optics Letters}, publisher={Optica Publishing Group}, author={Nikbakht,
Hamed and Khoshmehr, Mohammad Talebi and van Someren, Bob and Teichrib, Dieter
and Hammer, Manfred and Förstner, Jens and Akca, B. Imran}, year={2022}, pages={207}
}'
chicago: 'Nikbakht, Hamed, Mohammad Talebi Khoshmehr, Bob van Someren, Dieter Teichrib,
Manfred Hammer, Jens Förstner, and B. Imran Akca. “Asymmetric, Non-Uniform 3-DB
Directional Coupler with 300-Nm Bandwidth and a Small Footprint.” Optics Letters
48, no. 2 (2022): 207. https://doi.org/10.1364/ol.476537.'
ieee: 'H. Nikbakht et al., “Asymmetric, non-uniform 3-dB directional coupler
with 300-nm bandwidth and a small footprint,” Optics Letters, vol. 48,
no. 2, p. 207, 2022, doi: 10.1364/ol.476537.'
mla: Nikbakht, Hamed, et al. “Asymmetric, Non-Uniform 3-DB Directional Coupler with
300-Nm Bandwidth and a Small Footprint.” Optics Letters, vol. 48, no. 2,
Optica Publishing Group, 2022, p. 207, doi:10.1364/ol.476537.
short: H. Nikbakht, M.T. Khoshmehr, B. van Someren, D. Teichrib, M. Hammer, J. Förstner,
B.I. Akca, Optics Letters 48 (2022) 207.
date_created: 2023-01-03T09:32:47Z
date_updated: 2023-01-03T10:37:34Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
doi: 10.1364/ol.476537
file:
- access_level: local
content_type: application/pdf
creator: fossie
date_created: 2023-01-03T09:36:34Z
date_updated: 2023-01-03T09:36:34Z
embargo: 2024-01-03
embargo_to: open_access
file_id: '35129'
file_name: 2023-01 Nikbakht - Optics Letter - Asymmetric, non-uniform 3-dB directional
coupler with 300-nm bandwidth and small footprint.pdf
file_size: 3731864
relation: main_file
file_date_updated: 2023-01-03T09:36:34Z
has_accepted_license: '1'
intvolume: ' 48'
issue: '2'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: '207'
publication: Optics Letters
publication_identifier:
issn:
- 0146-9592
- 1539-4794
publication_status: published
publisher: Optica Publishing Group
status: public
title: Asymmetric, non-uniform 3-dB directional coupler with 300-nm bandwidth and
a small footprint
type: journal_article
user_id: '158'
volume: 48
year: '2022'
...
---
_id: '30389'
abstract:
- lang: eng
text: Online solvers for a series of standard 1-D or 2-D problems in integrated
optics will be discussed. Implemented on the basis of HTML/JavaScript/SVG with
core routines compiled from well tested C++-sources, the quasi-analytical algorithms
require a computational load that can be handled easily even by current mobile
devices. So far the series covers the 1-D guided modes of dielectric multilayer
slab waveguides and the oblique plane wave reflection from these, the modes of
rectangular channel waveguides (in an approximation of effective indices), bend
modes of curved multilayer slabs, whispering-gallery resonances (“Quasi-Normal-Modes”)
supported by circular dielectric cavities, the hybrid modes of circular multi-step-index
optical fibers, bound and leaky modes of 1-D complex multilayers, including plasmonic
surface modes, and, with restrictions, quite general rectangular scattering problems
in 2-D.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
citation:
ama: 'Hammer M. Small-scale online simulations in guided-wave photonics. In: García-Blanco
SM, Cheben P, eds. Integrated Optics: Devices, Materials, and Technologies
XXVI. SPIE; 2022:1200414. doi:10.1117/12.2612208'
apa: 'Hammer, M. (2022). Small-scale online simulations in guided-wave photonics.
In S. M. García-Blanco & P. Cheben (Eds.), Integrated Optics: Devices,
Materials, and Technologies XXVI (p. 1200414). SPIE. https://doi.org/10.1117/12.2612208'
bibtex: '@inproceedings{Hammer_2022, title={Small-scale online simulations in guided-wave
photonics}, DOI={10.1117/12.2612208},
booktitle={Integrated Optics: Devices, Materials, and Technologies XXVI}, publisher={SPIE},
author={Hammer, Manfred}, editor={García-Blanco, Sonia M. and Cheben, Pavel},
year={2022}, pages={1200414} }'
chicago: 'Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.”
In Integrated Optics: Devices, Materials, and Technologies XXVI, edited
by Sonia M. García-Blanco and Pavel Cheben, 1200414. SPIE, 2022. https://doi.org/10.1117/12.2612208.'
ieee: 'M. Hammer, “Small-scale online simulations in guided-wave photonics,” in
Integrated Optics: Devices, Materials, and Technologies XXVI, 2022, p.
1200414, doi: 10.1117/12.2612208.'
mla: 'Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.”
Integrated Optics: Devices, Materials, and Technologies XXVI, edited by
Sonia M. García-Blanco and Pavel Cheben, SPIE, 2022, p. 1200414, doi:10.1117/12.2612208.'
short: 'M. Hammer, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics:
Devices, Materials, and Technologies XXVI, SPIE, 2022, p. 1200414.'
date_created: 2022-03-21T10:17:30Z
date_updated: 2023-04-20T10:10:55Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1117/12.2612208
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: open_access
content_type: application/pdf
creator: fossie
date_created: 2022-03-22T18:05:02Z
date_updated: 2022-03-22T18:05:02Z
file_id: '30445'
file_name: 2022-03 Hammer - SPIE Photonics West 2022 - Small-scale online simulations
in guided-wave photonics (official version).pdf
file_size: 868473
relation: main_file
file_date_updated: 2022-03-22T18:05:02Z
has_accepted_license: '1'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: '1200414'
project:
- _id: '53'
name: 'TRR 142: TRR 142'
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '75'
name: 'TRR 142 - C05: TRR 142 - Subproject C05'
publication: 'Integrated Optics: Devices, Materials, and Technologies XXVI'
publication_status: published
publisher: SPIE
status: public
title: Small-scale online simulations in guided-wave photonics
type: conference
user_id: '158'
year: '2022'
...
---
_id: '30210'
abstract:
- lang: eng
text: Lithium niobate on insulator (LNOI) has a great potential for photonic integrated
circuits, providing substantial versatility in design of various integrated components.
To properly use these components in the implementation of different quantum protocols,
photons with different properties are required. In this paper, we theoretically
demonstrate a flexible source of correlated photons built on the LNOI waveguide
of a special geometry. This source is based on the parametric down-conversion
(PDC) process, in which the signal and idler photons are generated at the telecom
wavelength and have different spatial profiles and polarizations, but the same
group velocities. Distinguishability in polarizations and spatial profiles facilitates
the routing and manipulating individual photons, while the equality of their group
velocities leads to the absence of temporal walk-off between photons. We show
how the spectral properties of the generated photons and the number of their frequency
modes can be controlled depending on the pump characteristics and the waveguide
length. Finally, we discuss special regimes, in which narrowband light with strong
frequency correlations and polarization-entangled Bell states are generated at
the telecom wavelength.
author:
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Alessandro
full_name: Ferreri, Alessandro
id: '65609'
last_name: Ferreri
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Maximilian
full_name: Albert, Maximilian
last_name: Albert
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
- 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: 'Ebers L, Ferreri A, Hammer M, et al. Flexible source of correlated photons
based on LNOI rib waveguides. Journal of Physics: Photonics. 2022;4:025001.
doi:10.1088/2515-7647/ac5a5b'
apa: 'Ebers, L., Ferreri, A., Hammer, M., Albert, M., Meier, C., Förstner, J., &
Sharapova, P. R. (2022). Flexible source of correlated photons based on LNOI rib
waveguides. Journal of Physics: Photonics, 4, 025001. https://doi.org/10.1088/2515-7647/ac5a5b'
bibtex: '@article{Ebers_Ferreri_Hammer_Albert_Meier_Förstner_Sharapova_2022, title={Flexible
source of correlated photons based on LNOI rib waveguides}, volume={4}, DOI={10.1088/2515-7647/ac5a5b},
journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Ebers,
Lena and Ferreri, Alessandro and Hammer, Manfred and Albert, Maximilian and Meier,
Cedrik and Förstner, Jens and Sharapova, Polina R.}, year={2022}, pages={025001}
}'
chicago: 'Ebers, Lena, Alessandro Ferreri, Manfred Hammer, Maximilian Albert, Cedrik
Meier, Jens Förstner, and Polina R. Sharapova. “Flexible Source of Correlated
Photons Based on LNOI Rib Waveguides.” Journal of Physics: Photonics 4
(2022): 025001. https://doi.org/10.1088/2515-7647/ac5a5b.'
ieee: 'L. Ebers et al., “Flexible source of correlated photons based on LNOI
rib waveguides,” Journal of Physics: Photonics, vol. 4, p. 025001, 2022,
doi: 10.1088/2515-7647/ac5a5b.'
mla: 'Ebers, Lena, et al. “Flexible Source of Correlated Photons Based on LNOI Rib
Waveguides.” Journal of Physics: Photonics, vol. 4, IOP Publishing, 2022,
p. 025001, doi:10.1088/2515-7647/ac5a5b.'
short: 'L. Ebers, A. Ferreri, M. Hammer, M. Albert, C. Meier, J. Förstner, P.R.
Sharapova, Journal of Physics: Photonics 4 (2022) 025001.'
date_created: 2022-03-07T09:51:50Z
date_updated: 2025-12-16T11:31:04Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '15'
- _id: '569'
- _id: '170'
- _id: '287'
- _id: '35'
- _id: '34'
doi: 10.1088/2515-7647/ac5a5b
intvolume: ' 4'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: '025001'
project:
- _id: '56'
name: 'TRR 142 - C: TRR 142 - Project Area C'
- _id: '75'
name: 'TRR 142 - C5: TRR 142 - Subproject C5'
- _id: '72'
name: 'TRR 142 - C2: TRR 142 - Subproject C2'
- _id: '53'
name: 'TRR 142: TRR 142'
- _id: '53'
name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
zu funktionellen Strukturen'
publication: 'Journal of Physics: Photonics'
publication_identifier:
issn:
- 2515-7647
publication_status: published
publisher: IOP Publishing
related_material:
link:
- description: Corrigendum for table C1
relation: erratum
url: https://doi.org/10.1088/2515-7647/acc70c
status: public
title: Flexible source of correlated photons based on LNOI rib waveguides
type: journal_article
user_id: '16199'
volume: 4
year: '2022'
...
---
_id: '21932'
abstract:
- lang: eng
text: Gaussian-beam-like bundles of semi-guided waves propagating in a dielectric
slab can excite modes with high-order optical angular momentum supported by a
circular fiber. We consider a multimode step-index fiber with a high-index coating,
where the waves in the slab are evanescently coupled to the modes of the fiber.
Conditions for effective resonant interaction are identified. Based on a hybrid
analytical–numerical coupled mode model, our simulations predict that substantial
fractions of the input power can be focused into waves with specific orbital angular
momentum, of excellent purity, with a clear distinction between degenerate modes
with opposite vorticity.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Ebers L, Förstner J. Resonant evanescent excitation of guided waves
with high-order optical angular momentum. Journal of the Optical Society of
America B. 2021;38(5):1717. doi:10.1364/josab.422731
apa: Hammer, M., Ebers, L., & Förstner, J. (2021). Resonant evanescent excitation
of guided waves with high-order optical angular momentum. Journal of the Optical
Society of America B, 38(5), 1717. https://doi.org/10.1364/josab.422731
bibtex: '@article{Hammer_Ebers_Förstner_2021, title={Resonant evanescent excitation
of guided waves with high-order optical angular momentum}, volume={38}, DOI={10.1364/josab.422731}, number={5},
journal={Journal of the Optical Society of America B}, author={Hammer, Manfred
and Ebers, Lena and Förstner, Jens}, year={2021}, pages={1717} }'
chicago: 'Hammer, Manfred, Lena Ebers, and Jens Förstner. “Resonant Evanescent Excitation
of Guided Waves with High-Order Optical Angular Momentum.” Journal of the Optical
Society of America B 38, no. 5 (2021): 1717. https://doi.org/10.1364/josab.422731.'
ieee: M. Hammer, L. Ebers, and J. Förstner, “Resonant evanescent excitation of guided
waves with high-order optical angular momentum,” Journal of the Optical Society
of America B, vol. 38, no. 5, p. 1717, 2021.
mla: Hammer, Manfred, et al. “Resonant Evanescent Excitation of Guided Waves with
High-Order Optical Angular Momentum.” Journal of the Optical Society of America
B, vol. 38, no. 5, 2021, p. 1717, doi:10.1364/josab.422731.
short: M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America
B 38 (2021) 1717.
date_created: 2021-04-30T11:54:03Z
date_updated: 2022-01-06T06:55:20Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
doi: 10.1364/josab.422731
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2021-04-30T11:57:14Z
date_updated: 2021-04-30T11:57:14Z
file_id: '21933'
file_name: oamex.pdf
file_size: 1963211
relation: main_file
- access_level: local
content_type: application/pdf
creator: fossie
date_created: 2021-04-30T11:59:16Z
date_updated: 2021-04-30T11:59:16Z
embargo: 2022-05-01
embargo_to: open_access
file_id: '21934'
file_name: 2021-04 Hammer - JOSA B - Resonant evanescent excitation of guides waves
with high-order angular momentum.pdf
file_size: 7750006
relation: main_file
file_date_updated: 2021-04-30T11:59:16Z
has_accepted_license: '1'
intvolume: ' 38'
issue: '5'
keyword:
- tet_topic_waveguides
language:
- iso: eng
oa: '1'
page: '1717'
project:
- _id: '56'
name: TRR 142 - Project Area C
- _id: '53'
name: TRR 142
- _id: '75'
name: TRR 142 - Subproject C5
publication: Journal of the Optical Society of America B
publication_identifier:
issn:
- 0740-3224
- 1520-8540
publication_status: published
status: public
title: Resonant evanescent excitation of guided waves with high-order optical angular
momentum
type: journal_article
user_id: '158'
volume: 38
year: '2021'
...
---
_id: '28196'
abstract:
- lang: eng
text: We show that narrow trenches in a high-contrast silicon-photonics slab can
act as lossless power dividers for semi-guided waves. Reflectance and transmittance
can be easily configured by selecting the trench width. At sufficiently high angles
of incidence, the devices are lossless, apart from material attenuation and scattering
due to surface roughness. We numerically simulate a series of devices within the
full 0-to-1-range of splitting ratios, for semi-guided plane wave incidence as
well as for excitation by focused Gaussian wave bundles. Straightforward cascading
of the trenches leads to concepts for 1×M-power dividers and a polarization beam
splitter.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Ebers L, Förstner J. Configurable lossless broadband beam splitters
for semi-guided waves in integrated silicon photonics. OSA Continuum. 2021;4(12):3081.
doi:10.1364/osac.437549
apa: Hammer, M., Ebers, L., & Förstner, J. (2021). Configurable lossless broadband
beam splitters for semi-guided waves in integrated silicon photonics. OSA Continuum,
4(12), 3081. https://doi.org/10.1364/osac.437549
bibtex: '@article{Hammer_Ebers_Förstner_2021, title={Configurable lossless broadband
beam splitters for semi-guided waves in integrated silicon photonics}, volume={4},
DOI={10.1364/osac.437549}, number={12},
journal={OSA Continuum}, author={Hammer, Manfred and Ebers, Lena and Förstner,
Jens}, year={2021}, pages={3081} }'
chicago: 'Hammer, Manfred, Lena Ebers, and Jens Förstner. “Configurable Lossless
Broadband Beam Splitters for Semi-Guided Waves in Integrated Silicon Photonics.”
OSA Continuum 4, no. 12 (2021): 3081. https://doi.org/10.1364/osac.437549.'
ieee: 'M. Hammer, L. Ebers, and J. Förstner, “Configurable lossless broadband beam
splitters for semi-guided waves in integrated silicon photonics,” OSA Continuum,
vol. 4, no. 12, p. 3081, 2021, doi: 10.1364/osac.437549.'
mla: Hammer, Manfred, et al. “Configurable Lossless Broadband Beam Splitters for
Semi-Guided Waves in Integrated Silicon Photonics.” OSA Continuum, vol.
4, no. 12, 2021, p. 3081, doi:10.1364/osac.437549.
short: M. Hammer, L. Ebers, J. Förstner, OSA Continuum 4 (2021) 3081.
date_created: 2021-11-30T20:04:57Z
date_updated: 2022-11-18T09:58:03Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1364/osac.437549
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2021-11-30T20:07:53Z
date_updated: 2021-11-30T20:19:15Z
file_id: '28197'
file_name: 2021-11 Hammer - OSA Continuum - Trenches.pdf
file_size: 6618403
relation: main_file
file_date_updated: 2021-11-30T20:19:15Z
has_accepted_license: '1'
intvolume: ' 4'
issue: '12'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: '3081'
project:
- _id: '53'
name: TRR 142
- _id: '56'
name: TRR 142 - Project Area C
publication: OSA Continuum
publication_identifier:
issn:
- 2578-7519
publication_status: published
status: public
title: Configurable lossless broadband beam splitters for semi-guided waves in integrated
silicon photonics
type: journal_article
user_id: '477'
volume: 4
year: '2021'
...
---
_id: '23728'
abstract:
- lang: eng
text: We demonstrate the integration of amorphous tungsten silicide superconducting
nanowire single-photon detectors on titanium in-diffused lithium niobate waveguides.
We show proof-of-principle detection of evanescently coupled photons of 1550 nm
wavelength using bidirectional waveguide coupling for two orthogonal polarization
directions. We investigate the internal detection efficiency as well as detector
absorption using coupling-independent characterization measurements. Furthermore,
we describe strategies to improve the yield and efficiency of these devices.
article_type: original
author:
- first_name: Jan Philipp
full_name: Höpker, Jan Philipp
id: '33913'
last_name: Höpker
- first_name: Varun B
full_name: Verma, Varun B
last_name: Verma
- first_name: Maximilian
full_name: Protte, Maximilian
id: '46170'
last_name: Protte
- first_name: Raimund
full_name: Ricken, Raimund
last_name: Ricken
- first_name: Viktor
full_name: Quiring, Viktor
last_name: Quiring
- first_name: Christof
full_name: Eigner, Christof
id: '13244'
last_name: Eigner
orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- 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
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Richard P
full_name: Mirin, Richard P
last_name: Mirin
- first_name: Sae
full_name: Woo Nam, Sae
last_name: Woo Nam
- first_name: Tim
full_name: Bartley, Tim
id: '49683'
last_name: Bartley
citation:
ama: 'Höpker JP, Verma VB, Protte M, et al. Integrated superconducting nanowire
single-photon detectors on titanium in-diffused lithium niobate waveguides. Journal
of Physics: Photonics. 2021;3:034022. doi:10.1088/2515-7647/ac105b'
apa: 'Höpker, J. P., Verma, V. B., Protte, M., Ricken, R., Quiring, V., Eigner,
C., Ebers, L., Hammer, M., Förstner, J., Silberhorn, C., Mirin, R. P., Woo Nam,
S., & Bartley, T. (2021). Integrated superconducting nanowire single-photon
detectors on titanium in-diffused lithium niobate waveguides. Journal of Physics:
Photonics, 3, 034022. https://doi.org/10.1088/2515-7647/ac105b'
bibtex: '@article{Höpker_Verma_Protte_Ricken_Quiring_Eigner_Ebers_Hammer_Förstner_Silberhorn_et
al._2021, title={Integrated superconducting nanowire single-photon detectors on
titanium in-diffused lithium niobate waveguides}, volume={3}, DOI={10.1088/2515-7647/ac105b},
journal={Journal of Physics: Photonics}, author={Höpker, Jan Philipp and Verma,
Varun B and Protte, Maximilian and Ricken, Raimund and Quiring, Viktor and Eigner,
Christof and Ebers, Lena and Hammer, Manfred and Förstner, Jens and Silberhorn,
Christine and et al.}, year={2021}, pages={034022} }'
chicago: 'Höpker, Jan Philipp, Varun B Verma, Maximilian Protte, Raimund Ricken,
Viktor Quiring, Christof Eigner, Lena Ebers, et al. “Integrated Superconducting
Nanowire Single-Photon Detectors on Titanium in-Diffused Lithium Niobate Waveguides.”
Journal of Physics: Photonics 3 (2021): 034022. https://doi.org/10.1088/2515-7647/ac105b.'
ieee: 'J. P. Höpker et al., “Integrated superconducting nanowire single-photon
detectors on titanium in-diffused lithium niobate waveguides,” Journal of Physics:
Photonics, vol. 3, p. 034022, 2021, doi: 10.1088/2515-7647/ac105b.'
mla: 'Höpker, Jan Philipp, et al. “Integrated Superconducting Nanowire Single-Photon
Detectors on Titanium in-Diffused Lithium Niobate Waveguides.” Journal of Physics:
Photonics, vol. 3, 2021, p. 034022, doi:10.1088/2515-7647/ac105b.'
short: 'J.P. Höpker, V.B. Verma, M. Protte, R. Ricken, V. Quiring, C. Eigner, L.
Ebers, M. Hammer, J. Förstner, C. Silberhorn, R.P. Mirin, S. Woo Nam, T. Bartley,
Journal of Physics: Photonics 3 (2021) 034022.'
date_created: 2021-09-03T08:04:06Z
date_updated: 2022-10-25T07:34:42Z
ddc:
- '530'
department:
- _id: '15'
- _id: '61'
- _id: '230'
doi: 10.1088/2515-7647/ac105b
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2021-09-07T07:41:04Z
date_updated: 2021-09-07T07:41:04Z
file_id: '23825'
file_name: 2021-07 Höpker J._Phys._Photonics_3_034022.pdf
file_size: 1097820
relation: main_file
file_date_updated: 2021-09-07T07:41:04Z
has_accepted_license: '1'
intvolume: ' 3'
language:
- iso: eng
oa: '1'
page: '034022'
project:
- _id: '53'
name: TRR 142
publication: 'Journal of Physics: Photonics'
publication_identifier:
issn:
- 2515-7647
publication_status: published
status: public
title: Integrated superconducting nanowire single-photon detectors on titanium in-diffused
lithium niobate waveguides
type: journal_article
user_id: '49683'
volume: 3
year: '2021'
...
---
_id: '20189'
abstract:
- lang: eng
text: A dielectric step-index optical fiber with tube-like profile is considered,
being positioned with a small gap on top of a dielectric slab waveguide. We propose
a 2.5-D hybrid analytical/numerical coupled mode model for the evanescent excitation
of the tube through semi-guided waves propagating in the slab at oblique angles.
The model combines the directional polarized modes supported by the slab with
analytic solutions for the TE-, TM-, and orbital-angular-momentum (OAM) modes
of the tube-shaped fiber. Implementational details of the scheme are discussed,
complemented by finite-element simulations for verification purposes. Our results
include configurations with resonant in-fiber excitation of OAM modes with large
orbital angular momentum and strong field enhancement.
article_number: '472'
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Hammer M, Ebers L, Förstner J. Hybrid coupled mode modelling of the evanescent
excitation of a dielectric tube by semi-guided waves at oblique angles. Optical
and Quantum Electronics. 2020;52. doi:10.1007/s11082-020-02595-z
apa: Hammer, M., Ebers, L., & Förstner, J. (2020). Hybrid coupled mode modelling
of the evanescent excitation of a dielectric tube by semi-guided waves at oblique
angles. Optical and Quantum Electronics, 52. https://doi.org/10.1007/s11082-020-02595-z
bibtex: '@article{Hammer_Ebers_Förstner_2020, title={Hybrid coupled mode modelling
of the evanescent excitation of a dielectric tube by semi-guided waves at oblique
angles}, volume={52}, DOI={10.1007/s11082-020-02595-z},
number={472}, journal={Optical and Quantum Electronics}, author={Hammer, Manfred
and Ebers, Lena and Förstner, Jens}, year={2020} }'
chicago: Hammer, Manfred, Lena Ebers, and Jens Förstner. “Hybrid Coupled Mode Modelling
of the Evanescent Excitation of a Dielectric Tube by Semi-Guided Waves at Oblique
Angles.” Optical and Quantum Electronics 52 (2020). https://doi.org/10.1007/s11082-020-02595-z.
ieee: M. Hammer, L. Ebers, and J. Förstner, “Hybrid coupled mode modelling of the
evanescent excitation of a dielectric tube by semi-guided waves at oblique angles,”
Optical and Quantum Electronics, vol. 52, 2020.
mla: Hammer, Manfred, et al. “Hybrid Coupled Mode Modelling of the Evanescent Excitation
of a Dielectric Tube by Semi-Guided Waves at Oblique Angles.” Optical and Quantum
Electronics, vol. 52, 472, 2020, doi:10.1007/s11082-020-02595-z.
short: M. Hammer, L. Ebers, J. Förstner, Optical and Quantum Electronics 52 (2020).
date_created: 2020-10-24T08:03:58Z
date_updated: 2022-01-06T06:54:22Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1007/s11082-020-02595-z
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2020-10-24T08:11:40Z
date_updated: 2020-10-24T08:11:40Z
file_id: '20190'
file_name: 2020-10 Hammer - OQE - Hybrid Coupled Mode Modelling Dielectric Tube.pdf
file_size: 2212769
relation: main_file
success: 1
file_date_updated: 2020-10-24T08:11:40Z
has_accepted_license: '1'
intvolume: ' 52'
keyword:
- tet_topic_waveguides
language:
- iso: eng
project:
- _id: '56'
name: TRR 142 - Project Area C
- _id: '75'
name: TRR 142 - Subproject C5
- _id: '53'
name: TRR 142
publication: Optical and Quantum Electronics
publication_identifier:
issn:
- 0306-8919
- 1572-817X
publication_status: published
status: public
title: Hybrid coupled mode modelling of the evanescent excitation of a dielectric
tube by semi-guided waves at oblique angles
type: journal_article
user_id: '158'
volume: 52
year: '2020'
...
---
_id: '20372'
abstract:
- lang: eng
text: A stepwise angular spectrum method (SASM) for curved interfaces is presented
to calculate the wave propagation in planar lens-like integrated optical structures
based on photonic slab waveguides. The method is derived and illustrated for an
effective 2D setup first and then for 3D slab waveguide lenses. We employ slab
waveguides of different thicknesses connected by curved surfaces to realize a
lens-like structure. To simulate the wave propagation in 3D including reflection
and scattering losses, the stepwise angular spectrum method is combined with full
vectorial finite element computations for subproblems with lower complexity. Our
SASM results show excellent agreement with rigorous numerical simulations of the
full structures with a substantially lower computational effort and can be utilized
for the simulation-based design and optimization of complex and large scale setups.
author:
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- 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: Ebers L, Hammer M, Förstner J. Light diffraction in slab waveguide lenses simulated
with the stepwise angular spectrum method. Optics Express. 2020;28(24):36361.
doi:10.1364/oe.409612
apa: Ebers, L., Hammer, M., & Förstner, J. (2020). Light diffraction in slab
waveguide lenses simulated with the stepwise angular spectrum method. Optics
Express, 28(24), 36361. https://doi.org/10.1364/oe.409612
bibtex: '@article{Ebers_Hammer_Förstner_2020, title={Light diffraction in slab waveguide
lenses simulated with the stepwise angular spectrum method}, volume={28}, DOI={10.1364/oe.409612}, number={24},
journal={Optics Express}, author={Ebers, Lena and Hammer, Manfred and Förstner,
Jens}, year={2020}, pages={36361} }'
chicago: 'Ebers, Lena, Manfred Hammer, and Jens Förstner. “Light Diffraction in
Slab Waveguide Lenses Simulated with the Stepwise Angular Spectrum Method.” Optics
Express 28, no. 24 (2020): 36361. https://doi.org/10.1364/oe.409612.'
ieee: L. Ebers, M. Hammer, and J. Förstner, “Light diffraction in slab waveguide
lenses simulated with the stepwise angular spectrum method,” Optics Express,
vol. 28, no. 24, p. 36361, 2020.
mla: Ebers, Lena, et al. “Light Diffraction in Slab Waveguide Lenses Simulated with
the Stepwise Angular Spectrum Method.” Optics Express, vol. 28, no. 24,
2020, p. 36361, doi:10.1364/oe.409612.
short: L. Ebers, M. Hammer, J. Förstner, Optics Express 28 (2020) 36361.
date_created: 2020-11-17T09:52:47Z
date_updated: 2022-01-06T06:54:26Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1364/oe.409612
intvolume: ' 28'
issue: '24'
keyword:
- tet_topic_waveguides
language:
- iso: eng
page: '36361'
project:
- _id: '53'
name: TRR 142
- _id: '56'
name: TRR 142 - Project Area C
- _id: '74'
name: TRR 142 - Subproject C4
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Optics Express
publication_identifier:
issn:
- 1094-4087
publication_status: published
status: public
title: Light diffraction in slab waveguide lenses simulated with the stepwise angular
spectrum method
type: journal_article
user_id: '158'
volume: 28
year: '2020'
...
---
_id: '21719'
abstract:
- lang: eng
text: We fabricate silicon tapers to increase the mode overlap of superconducting
detectors on Ti:LiNbO3 waveguides. Mode images show a reduction in mode size from
6 µm to 2 µm FWHM, agreeing with beam propagation simulations.
article_number: QTh7A.8
author:
- first_name: Maximilian
full_name: Protte, Maximilian
id: '46170'
last_name: Protte
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Jan Philipp
full_name: Höpker, Jan Philipp
id: '33913'
last_name: Höpker
- first_name: Maximilian
full_name: Albert, Maximilian
last_name: Albert
- first_name: Viktor
full_name: Quiring, Viktor
last_name: Quiring
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
- 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: 'Protte M, Ebers L, Hammer M, et al. Towards Semiconductor-Superconductor-Crystal
Hybrid Integration for Quantum Photonics. In: OSA Quantum 2.0 Conference.
; 2020. doi:10.1364/quantum.2020.qth7a.8'
apa: Protte, M., Ebers, L., Hammer, M., Höpker, J. P., Albert, M., Quiring, V.,
Meier, C., Förstner, J., Silberhorn, C., & Bartley, T. (2020). Towards Semiconductor-Superconductor-Crystal
Hybrid Integration for Quantum Photonics. OSA Quantum 2.0 Conference, Article
QTh7A.8. https://doi.org/10.1364/quantum.2020.qth7a.8
bibtex: '@inproceedings{Protte_Ebers_Hammer_Höpker_Albert_Quiring_Meier_Förstner_Silberhorn_Bartley_2020,
title={Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum
Photonics}, DOI={10.1364/quantum.2020.qth7a.8},
number={QTh7A.8}, booktitle={OSA Quantum 2.0 Conference}, author={Protte, Maximilian
and Ebers, Lena and Hammer, Manfred and Höpker, Jan Philipp and Albert, Maximilian
and Quiring, Viktor and Meier, Cedrik and Förstner, Jens and Silberhorn, Christine
and Bartley, Tim}, year={2020} }'
chicago: Protte, Maximilian, Lena Ebers, Manfred Hammer, Jan Philipp Höpker, Maximilian
Albert, Viktor Quiring, Cedrik Meier, Jens Förstner, Christine Silberhorn, and
Tim Bartley. “Towards Semiconductor-Superconductor-Crystal Hybrid Integration
for Quantum Photonics.” In OSA Quantum 2.0 Conference, 2020. https://doi.org/10.1364/quantum.2020.qth7a.8.
ieee: 'M. Protte et al., “Towards Semiconductor-Superconductor-Crystal Hybrid
Integration for Quantum Photonics,” 2020, doi: 10.1364/quantum.2020.qth7a.8.'
mla: Protte, Maximilian, et al. “Towards Semiconductor-Superconductor-Crystal Hybrid
Integration for Quantum Photonics.” OSA Quantum 2.0 Conference, QTh7A.8,
2020, doi:10.1364/quantum.2020.qth7a.8.
short: 'M. Protte, L. Ebers, M. Hammer, J.P. Höpker, M. Albert, V. Quiring, C. Meier,
J. Förstner, C. Silberhorn, T. Bartley, in: OSA Quantum 2.0 Conference, 2020.'
date_created: 2021-04-22T15:56:45Z
date_updated: 2022-10-25T07:41:15Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '15'
doi: 10.1364/quantum.2020.qth7a.8
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2021-04-22T15:58:52Z
date_updated: 2021-04-22T15:58:52Z
file_id: '21720'
file_name: Quantum2.0-Towards SSC hybrid integration for quantum photonics[4936].pdf
file_size: 1704199
relation: main_file
success: 1
file_date_updated: 2021-04-22T15:58:52Z
has_accepted_license: '1'
keyword:
- tet_topic_waveguide
language:
- iso: eng
publication: OSA Quantum 2.0 Conference
publication_identifier:
isbn:
- '9781943580811'
publication_status: published
status: public
title: Towards Semiconductor-Superconductor-Crystal Hybrid Integration for Quantum
Photonics
type: conference
user_id: '49683'
year: '2020'
...
---
_id: '12908'
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Hammer M, Ebers L, Förstner J. Oblique quasi-lossless excitation of a thin
silicon slab waveguide: a guided-wave variant of an anti-reflection coating. Journal
of the Optical Society of America B. 2019;36:2395. doi:10.1364/josab.36.002395'
apa: 'Hammer, M., Ebers, L., & Förstner, J. (2019). Oblique quasi-lossless excitation
of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection
coating. Journal of the Optical Society of America B, 36, 2395.
https://doi.org/10.1364/josab.36.002395'
bibtex: '@article{Hammer_Ebers_Förstner_2019, title={Oblique quasi-lossless excitation
of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection
coating}, volume={36}, DOI={10.1364/josab.36.002395},
journal={Journal of the Optical Society of America B}, author={Hammer, Manfred
and Ebers, Lena and Förstner, Jens}, year={2019}, pages={2395} }'
chicago: 'Hammer, Manfred, Lena Ebers, and Jens Förstner. “Oblique Quasi-Lossless
Excitation of a Thin Silicon Slab Waveguide: A Guided-Wave Variant of an Anti-Reflection
Coating.” Journal of the Optical Society of America B 36 (2019): 2395.
https://doi.org/10.1364/josab.36.002395.'
ieee: 'M. Hammer, L. Ebers, and J. Förstner, “Oblique quasi-lossless excitation
of a thin silicon slab waveguide: a guided-wave variant of an anti-reflection
coating,” Journal of the Optical Society of America B, vol. 36, p. 2395,
2019.'
mla: 'Hammer, Manfred, et al. “Oblique Quasi-Lossless Excitation of a Thin Silicon
Slab Waveguide: A Guided-Wave Variant of an Anti-Reflection Coating.” Journal
of the Optical Society of America B, vol. 36, 2019, p. 2395, doi:10.1364/josab.36.002395.'
short: M. Hammer, L. Ebers, J. Förstner, Journal of the Optical Society of America
B 36 (2019) 2395.
date_created: 2019-08-09T07:07:45Z
date_updated: 2022-01-06T06:51:24Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1364/josab.36.002395
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2019-08-09T07:09:04Z
date_updated: 2019-08-09T07:09:04Z
file_id: '12909'
file_name: 2019-07 Hammer - JOSA B - Oblique Quasi-Lossless Excitation of a Thin
Silicon Slab Waveguide (preprint).pdf
file_size: 728533
relation: main_file
file_date_updated: 2019-08-09T07:09:04Z
has_accepted_license: '1'
intvolume: ' 36'
keyword:
- tet_topic_waveguides
language:
- iso: eng
oa: '1'
page: '2395'
project:
- _id: '53'
name: TRR 142
- _id: '56'
name: TRR 142 - Project Area C
- _id: '75'
name: TRR 142 - Subproject C5
publication: Journal of the Optical Society of America B
publication_identifier:
issn:
- 0740-3224
- 1520-8540
publication_status: published
status: public
title: 'Oblique quasi-lossless excitation of a thin silicon slab waveguide: a guided-wave
variant of an anti-reflection coating'
type: journal_article
user_id: '158'
volume: 36
year: '2019'
...
---
_id: '14990'
abstract:
- lang: eng
text: We investigate optical microresonators consisting of either one or two coupled
rectangular strips between upper and lower slab waveguides. The cavities are evanescently
excited under oblique angles by thin-film guided, in-plane unguided waves supported
by one of the slab waveguides. Beyond a specific incidence angle, losses are fully
suppressed. The interaction between the guided mode of the cavity-strip and the
incoming slab modes leads to resonant behavior for specific incidence angles and
gaps. For a single cavity, at resonance, the input power is equally split among
each of the four output ports, while for two cavities an add-drop filter can be
realized that, at resonance, routes the incoming power completely to the forward
drop waveguide via the cavity. For both applications, the strength of the interaction
is controlled by the gaps between cavities and waveguides.
author:
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Manuel B.
full_name: Berkemeier, Manuel B.
last_name: Berkemeier
- first_name: Alexander
full_name: Menzel, Alexander
last_name: Menzel
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Ebers L, Hammer M, Berkemeier MB, Menzel A, Förstner J. Coupled microstrip-cavities
under oblique incidence of semi-guided waves: a lossless integrated optical add-drop
filter. OSA Continuum. 2019;2:3288. doi:10.1364/osac.2.003288'
apa: 'Ebers, L., Hammer, M., Berkemeier, M. B., Menzel, A., & Förstner, J. (2019).
Coupled microstrip-cavities under oblique incidence of semi-guided waves: a lossless
integrated optical add-drop filter. OSA Continuum, 2, 3288. https://doi.org/10.1364/osac.2.003288'
bibtex: '@article{Ebers_Hammer_Berkemeier_Menzel_Förstner_2019, title={Coupled microstrip-cavities
under oblique incidence of semi-guided waves: a lossless integrated optical add-drop
filter}, volume={2}, DOI={10.1364/osac.2.003288},
journal={OSA Continuum}, author={Ebers, Lena and Hammer, Manfred and Berkemeier,
Manuel B. and Menzel, Alexander and Förstner, Jens}, year={2019}, pages={3288}
}'
chicago: 'Ebers, Lena, Manfred Hammer, Manuel B. Berkemeier, Alexander Menzel, and
Jens Förstner. “Coupled Microstrip-Cavities under Oblique Incidence of Semi-Guided
Waves: A Lossless Integrated Optical Add-Drop Filter.” OSA Continuum 2
(2019): 3288. https://doi.org/10.1364/osac.2.003288.'
ieee: 'L. Ebers, M. Hammer, M. B. Berkemeier, A. Menzel, and J. Förstner, “Coupled
microstrip-cavities under oblique incidence of semi-guided waves: a lossless integrated
optical add-drop filter,” OSA Continuum, vol. 2, p. 3288, 2019.'
mla: 'Ebers, Lena, et al. “Coupled Microstrip-Cavities under Oblique Incidence of
Semi-Guided Waves: A Lossless Integrated Optical Add-Drop Filter.” OSA Continuum,
vol. 2, 2019, p. 3288, doi:10.1364/osac.2.003288.'
short: L. Ebers, M. Hammer, M.B. Berkemeier, A. Menzel, J. Förstner, OSA Continuum
2 (2019) 3288.
date_created: 2019-11-15T07:21:20Z
date_updated: 2022-01-06T06:52:13Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
doi: 10.1364/osac.2.003288
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2019-11-15T15:33:26Z
date_updated: 2019-11-15T15:33:26Z
file_id: '15012'
file_name: 2019-11-12 Ebers - Add Drop Filter - OSA continuum (official version).pdf
file_size: 882779
relation: main_file
file_date_updated: 2019-11-15T15:33:26Z
has_accepted_license: '1'
intvolume: ' 2'
keyword:
- tet_topic_waveguides
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.osapublishing.org/osac/abstract.cfm?uri=osac-2-11-3288
oa: '1'
page: '3288'
project:
- _id: '53'
name: TRR 142
- _id: '56'
name: TRR 142 - Project Area C
- _id: '75'
name: TRR 142 - Subproject C5
publication: OSA Continuum
publication_identifier:
issn:
- 2578-7519
publication_status: published
status: public
title: 'Coupled microstrip-cavities under oblique incidence of semi-guided waves:
a lossless integrated optical add-drop filter'
type: journal_article
user_id: '158'
volume: 2
year: '2019'
...
---
_id: '7720'
abstract:
- lang: ger
text: 'Die Erfindung betrifft einen optischen Übergang zwischen zwei optischen Schichtwellenleitern.
Dazu ist eine Anordnung vorgesehen aus einem ersten optischen Schichtwellenleiter
(2) und einem zweiten optischen Schichtwellenleiter (3), wobei der erste optische
Schichtwellenleiter (2) und der zweite optische Schichtwellenleiter (3) voneinander
verschiedene über ihre jeweilige Länge konstante Dicken (d, r) aufweisen, der
erste optische Schichtwellenleiter (2) mit dem zweiten optischen Schichtwellenleiter
(3) mittels einer optischen Schichtwellenleiterstruktur (4) verbunden ist, die
über ihre gesamte Länge (w) eine Dicke (h) aufweist, die zwischen der Dicke (d)
des ersten optischen Schichtwellenleiters (2) und der Dicke (r) des zweiten optischen
Schichtwellenleiters (3) liegt. Erfindungsgemäß ist die Dicke (h) der optischen
Schichtwellenleiterstruktur (4) über die gesamte Länge (w) der optischen Schichtwellenleiterstruktur
(4) konstant. Damit wird eine Möglichkeit für einen effizienten und mit geringen
Verlusten behafteten Übergang zwischen zwei optischen Schichtwellenleitern mit
unterschiedlicher Dicke bereitgestellt. '
- lang: eng
text: The invention relates to an optical junction between two optical planar waveguides.
For this purpose, an arrangement is provided of a first optical layer waveguide
(2) and a second optical slab waveguide (3), wherein the first optical layer waveguide
(2) and the second optical slab waveguide (3) different from each other is constant
over their respective length of thicknesses (d, r ) which the first optical layer
waveguide (2) with the second optical film waveguide (3) (by means of an optical
layer waveguide structure 4) is connected, which (along their entire length w)
has a thickness (h) which is between the thickness (d) the first optical waveguide
layer (2) and the thickness (r) of the second optical waveguide layer (3). According
to the invention, the thickness (h) of the optical layer waveguide structure (4)
over the entire length (w) of the optical layer waveguide structure (4) constant.
Thus, a possibility for an efficient and entailing low loss transition between
two optical planar waveguides is provided with different thickness.
application_date: 2018-04-05
application_number: '102018108110'
author:
- 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
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
citation:
ama: Hammer M, Förstner J, Ebers L. Optical transition between two optical waveguides
layer and method for transmitting light. Published online 2019.
apa: Hammer, M., Förstner, J., & Ebers, L. (2019). Optical transition between
two optical waveguides layer and method for transmitting light.
bibtex: '@article{Hammer_Förstner_Ebers_2019, title={Optical transition between
two optical waveguides layer and method for transmitting light}, author={Hammer,
Manfred and Förstner, Jens and Ebers, Lena}, year={2019} }'
chicago: Hammer, Manfred, Jens Förstner, and Lena Ebers. “Optical Transition between
Two Optical Waveguides Layer and Method for Transmitting Light,” 2019.
ieee: M. Hammer, J. Förstner, and L. Ebers, “Optical transition between two optical
waveguides layer and method for transmitting light.” 2019.
mla: Hammer, Manfred, et al. Optical Transition between Two Optical Waveguides
Layer and Method for Transmitting Light. 2019.
short: M. Hammer, J. Förstner, L. Ebers, (2019).
date_created: 2019-02-15T10:25:59Z
date_updated: 2022-04-27T07:35:46Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2019-02-15T10:21:08Z
date_updated: 2019-02-15T10:21:08Z
file_id: '7721'
file_name: 2019-01-31 DE-Patentschrift_5349.pdf
file_size: 155604
relation: main_file
success: 1
file_date_updated: 2019-02-15T10:21:08Z
has_accepted_license: '1'
ipc: G02B 6/26
ipn: DE102018108110B3
keyword:
- tet_topic_waveguides
main_file_link:
- url: https://patents.google.com/patent/DE102018108110B3/en
page: '9'
project:
- _id: '53'
name: TRR 142
- _id: '56'
name: TRR 142 - Project Area C
- _id: '75'
name: TRR 142 - Subproject C5
publication_date: 2019-01-31
status: public
title: Optical transition between two optical waveguides layer and method for transmitting
light
type: patent
user_id: '158'
year: '2019'
...
---
_id: '8634'
abstract:
- lang: eng
text: "A rectangular dielectric strip at some distance above an optical slab waveguide
is\r\nbeing considered, for evanescent excitation of the strip through the semi-guided
waves supported\r\nby the slab, at specific oblique angles. The 2.5-D configuration
shows resonant transmission\r\nproperties with respect to variations of the angle
of incidence, or of the excitation frequency,\r\nrespectively. The strength of
the interaction can be controlled by the gap between strip and slab.\r\nFor increasing
distance, our simulations predict resonant states with unit extremal reflectance\r\nof
an angular or spectral width that tends to zero, i.e. resonances with a Q-factor
that tends\r\nto infinity, while the resonance position approaches the level of
the guided mode of the strip.\r\nThis exceptionally simple system realizes what
might be termed a “bound state coupled to the\r\ncontinuum”."
article_type: original
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Hammer M, Ebers L, Förstner J. Oblique evanescent excitation of a dielectric
strip: A model resonator with an open optical cavity of unlimited Q. Optics
Express. 2019;27(7):8. doi:10.1364/OE.27.009313'
apa: 'Hammer, M., Ebers, L., & Förstner, J. (2019). Oblique evanescent excitation
of a dielectric strip: A model resonator with an open optical cavity of unlimited
Q. Optics Express, 27(7), 8. https://doi.org/10.1364/OE.27.009313'
bibtex: '@article{Hammer_Ebers_Förstner_2019, title={Oblique evanescent excitation
of a dielectric strip: A model resonator with an open optical cavity of unlimited
Q}, volume={27}, DOI={10.1364/OE.27.009313},
number={7}, journal={Optics Express}, author={Hammer, Manfred and Ebers, Lena
and Förstner, Jens}, year={2019}, pages={8} }'
chicago: 'Hammer, Manfred, Lena Ebers, and Jens Förstner. “Oblique Evanescent Excitation
of a Dielectric Strip: A Model Resonator with an Open Optical Cavity of Unlimited
Q.” Optics Express 27, no. 7 (2019): 8. https://doi.org/10.1364/OE.27.009313.'
ieee: 'M. Hammer, L. Ebers, and J. Förstner, “Oblique evanescent excitation of a
dielectric strip: A model resonator with an open optical cavity of unlimited Q,”
Optics Express, vol. 27, no. 7, p. 8, 2019, doi: 10.1364/OE.27.009313.'
mla: 'Hammer, Manfred, et al. “Oblique Evanescent Excitation of a Dielectric Strip:
A Model Resonator with an Open Optical Cavity of Unlimited Q.” Optics Express,
vol. 27, no. 7, 2019, p. 8, doi:10.1364/OE.27.009313.'
short: M. Hammer, L. Ebers, J. Förstner, Optics Express 27 (2019) 8.
date_created: 2019-03-26T10:39:00Z
date_updated: 2023-01-03T10:34:29Z
ddc:
- '600'
department:
- _id: '61'
doi: 10.1364/OE.27.009313
file:
- access_level: closed
content_type: application/pdf
creator: nprante
date_created: 2019-03-27T13:47:50Z
date_updated: 2019-03-27T13:47:50Z
file_id: '8714'
file_name: oe-27-7-9313.pdf
file_size: 2388537
relation: main_file
success: 1
file_date_updated: 2019-03-27T13:47:50Z
has_accepted_license: '1'
intvolume: ' 27'
issue: '7'
keyword:
- tet_topic_waveguides
language:
- iso: eng
page: '8'
publication: Optics Express
status: public
title: 'Oblique evanescent excitation of a dielectric strip: A model resonator with
an open optical cavity of unlimited Q'
type: journal_article
user_id: '158'
volume: 27
year: '2019'
...