---
_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: '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: '30722'
abstract:
- lang: eng
text: In dieser Arbeit wird die elektromagnetische Wellenausbreitung in integrierten
optischen Wellenleitern mit Hilfe von halb analytischen und numerischen Simulationsmethoden
untersucht. Im ersten Teil werden 2-D Si/SiO2-Wellenleiterkonfigurationen mit
hohem Brechungsindexkontrast betrachtet. Die Strukturen werden mit halb geführten
Wellen unter schrägen Ausbreitungswinkeln angeregt. Dadurch kann die Leistungsübertragung
zu bestimmten ausgehenden Moden unterdrückt werden, wodurch vollständig verlustfreie
Systeme entstehen. Zusätzlich dient die Anregung mit einem seitlich begrenzten,
einfallenden Wellenbündel aus halb geführten Wellen dazu, praktisch relevantere
3-D Konfigurationen zu realisieren. Darüber hinaus wird eine schrittweise Winkelspektrum-Methode
vorgestellt, die es ermöglicht, in Kombination mit voll vektoriellen 2-D Finite-Elemente-Lösungen
für Teilprobleme mit geringerer Komplexität, die Wellenausbreitung in planaren,
linsenförmigen Wellenleitern numerisch in drei Raumrichtungen zu berechnen. Im
zweiten Teil dieser Arbeit wird die Ausbreitung in Wellenleiterstrukturen aus
Lithiumniobat untersucht, welche für quantenoptische Effekte genutzt werden. Zur
Detektion einzelner Photonen werden supraleitende Nanodrähte auf eindiffundierten
Lithiumniobat Wellenleitern mit zusätzlicher Taperschicht aus Silizium betrachtet.
Um die Wellenausbreitung in diesen 3-D Wellenleitern zu beschreiben, wird eine
einseitig gerichtete Finite-Elemente „Modal Matching“ Methode eingeführt. Abschließend
werden Rippenwellenleiter aus Lithiumniobat analysiert, die auf Siliziumdioxid
Plattformen aufgebracht sind. Der Schwerpunkt liegt hier auf dem nichtlinearen
„Parametric Down-Conversion“ Prozess, der für die Erzeugung verschränkter Photonen
verwendet wird.
- lang: eng
text: In this work, the electromagnetic wave propagation in integrated optical waveguides
is studied by using semi-analytical and numerical simulation methods. In the first
part, 2-D high-index contrast Si/SiO2 dielectric slab waveguide configurations
are investigated. The structures are excited with semi-guided waves at oblique
angles of propagation. Due to this, power transfer to specific outgoing modes
can be suppressed, resulting in completely lossless configurations. The excitation
is further examined for incoming, laterally confined wave bundles of semi-guided
waves to realize practically more relevant 3-D configurations. Additionally, a
stepwise angular spectrum method in combination with full vectorial 2-D finite
element solutions for subproblems of lower complexity to numerically simulate
the wave propagation in full 3-D planar lens-like waveguides is presented. In
the second part, the wave propagation in lithium niobate waveguide structures
is examined, which are used for quantum optical effects. On the one hand, superconducting
nanowires on titanium in-diffused lithium niobate waveguides with an additional
tapered silicon layer are used for single photon detection. The wave propagation
in these 3-D multiscale tapers is studied by introducing a unidirectional finite
element modal matching method. On the other hand, lithium niobate rib waveguides
on silicon dioxide platforms are analyzed, focusing on the nonlinear parametric
down-conversion process used for the generation of entangled photons.
author:
- first_name: Lena
full_name: Ebers, Lena
id: '40428'
last_name: Ebers
citation:
ama: Ebers L. Semi-Guided Waves in Integrated Optical Waveguide Structures.;
2022. doi:10.17619/UNIPB/1-1288
apa: Ebers, L. (2022). Semi-guided waves in integrated optical waveguide structures.
https://doi.org/10.17619/UNIPB/1-1288
bibtex: '@book{Ebers_2022, title={Semi-guided waves in integrated optical waveguide
structures}, DOI={10.17619/UNIPB/1-1288},
author={Ebers, Lena}, year={2022} }'
chicago: Ebers, Lena. Semi-Guided Waves in Integrated Optical Waveguide Structures,
2022. https://doi.org/10.17619/UNIPB/1-1288.
ieee: L. Ebers, Semi-guided waves in integrated optical waveguide structures.
2022.
mla: Ebers, Lena. Semi-Guided Waves in Integrated Optical Waveguide Structures.
2022, doi:10.17619/UNIPB/1-1288.
short: L. Ebers, Semi-Guided Waves in Integrated Optical Waveguide Structures, 2022.
date_created: 2022-03-29T18:42:08Z
date_updated: 2022-03-29T18:44:30Z
department:
- _id: '61'
- _id: '230'
doi: 10.17619/UNIPB/1-1288
keyword:
- tet_topic_waveguide
language:
- iso: eng
status: public
supervisor:
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
title: Semi-guided waves in integrated optical waveguide structures
type: dissertation
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: '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: '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: '3740'
abstract:
- lang: eng
text: Oblique propagation of semi-guided waves across slab waveguide structures
with bent corners is investigated. A critical angle can be defined beyond which
all radiation losses are suppressed. Additionally an increase of the curvature
radius of the bends also leads to low-loss configurations for incidence angles
below that critical angle. A combination of two bent corner systems represents
a step-like structure, behaving like a Fabry-Perot interferometer, with two partial
reflectors separated by the vertical height between the horizontal slabs. We numerically
analyse typical high-index-contrast Si/SiO2 structures for their reflectance and
transmittance properties. When increasing the curvature radius the resonant effect
becomes less relevant such that full transmittance is reached with less critical
conditions on the vertical distance or the incidence angle. For practical interest
3-D problems are considered, where the structures are excited by the fundamental
mode of a wide, shallow rib waveguide. High transmittance levels can be observed
also for these 3-D configurations depending on the width of the rib.
article_type: letter_note
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. Oblique incidence of semi-guided planar waves
on slab waveguide steps: effects of rounded edges. Optics Express. 2018;26(14):18621-18632.
doi:10.1364/OE.26.018621'
apa: 'Ebers, L., Hammer, M., & Förstner, J. (2018). Oblique incidence of semi-guided
planar waves on slab waveguide steps: effects of rounded edges. Optics Express,
26(14), 18621–18632. https://doi.org/10.1364/OE.26.018621'
bibtex: '@article{Ebers_Hammer_Förstner_2018, title={Oblique incidence of semi-guided
planar waves on slab waveguide steps: effects of rounded edges}, volume={26},
DOI={10.1364/OE.26.018621},
number={14}, journal={Optics Express}, publisher={OSA Publishing}, author={Ebers,
Lena and Hammer, Manfred and Förstner, Jens}, year={2018}, pages={18621–18632}
}'
chicago: 'Ebers, Lena, Manfred Hammer, and Jens Förstner. “Oblique Incidence of
Semi-Guided Planar Waves on Slab Waveguide Steps: Effects of Rounded Edges.” Optics
Express 26, no. 14 (2018): 18621–32. https://doi.org/10.1364/OE.26.018621.'
ieee: 'L. Ebers, M. Hammer, and J. Förstner, “Oblique incidence of semi-guided planar
waves on slab waveguide steps: effects of rounded edges,” Optics Express,
vol. 26, no. 14, pp. 18621–18632, 2018.'
mla: 'Ebers, Lena, et al. “Oblique Incidence of Semi-Guided Planar Waves on Slab
Waveguide Steps: Effects of Rounded Edges.” Optics Express, vol. 26, no.
14, OSA Publishing, 2018, pp. 18621–32, doi:10.1364/OE.26.018621.'
short: L. Ebers, M. Hammer, J. Förstner, Optics Express 26 (2018) 18621–18632.
date_created: 2018-08-01T09:31:03Z
date_updated: 2022-01-06T06:59:33Z
ddc:
- '620'
department:
- _id: '61'
doi: 10.1364/OE.26.018621
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-01T09:30:58Z
date_updated: 2018-08-01T09:30:58Z
file_id: '3741'
file_name: 2018-07 Ebers_Hammer_Förstner_OpticsExpress_Oblique incidence of semi
guided planar waves on slab waveguide steps_Rounded Edges.pdf
file_size: 6193865
relation: main_file
file_date_updated: 2018-08-01T09:30:58Z
has_accepted_license: '1'
intvolume: ' 26'
issue: '14'
keyword:
- tet_topic_waveguide
language:
- iso: eng
oa: '1'
page: 18621-18632
project:
- _id: '56'
name: TRR 142 - Project Area C
- _id: '53'
name: TRR 142
- _id: '75'
name: TRR 142 - Subproject C5
publication: Optics Express
publication_status: published
publisher: OSA Publishing
status: public
title: 'Oblique incidence of semi-guided planar waves on slab waveguide steps: effects
of rounded edges'
type: journal_article
urn: '37409'
user_id: '158'
volume: 26
year: '2018'
...
---
_id: '3743'
abstract:
- lang: eng
text: Frequently, optical integrated circuits combine elements (waveguide channels,
cavities), the simulation of which is well established through mature numerical
eigenproblem solvers. It remains to predict the interaction of these modes. We
address this task by a general, “Hybrid” variant (HCMT) of Coupled Mode Theory.
Using methods from finite-element numerics, the properties of a circuit are approximated
by superpositions of eigen-solutions for its constituents, leading to quantitative,
computationally cheap, and easily interpretable models.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
citation:
ama: 'Hammer M. Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid
Analytical/Numerical Approach to Coupled Mode Theory. In: Agrawal A, ed. Recent
Trends in Computational Photonics. Vol 204. 204th ed. Springer Series in
Optical Sciences book series. Springer; 2017:77-105.'
apa: Hammer, M. (2017). Guided Wave Interaction in Photonic Integrated Circuits
— A Hybrid Analytical/Numerical Approach to Coupled Mode Theory. In A. Agrawal
(Ed.), Recent Trends in Computational Photonics (204th ed., Vol. 204, pp.
77–105). Springer.
bibtex: '@inbook{Hammer_2017, edition={204}, series={ Springer Series in Optical
Sciences book series}, title={Guided Wave Interaction in Photonic Integrated Circuits
— A Hybrid Analytical/Numerical Approach to Coupled Mode Theory}, volume={204},
booktitle={Recent Trends in Computational Photonics}, publisher={Springer}, author={Hammer,
Manfred}, editor={Agrawal, ArtiEditor}, year={2017}, pages={77–105}, collection={
Springer Series in Optical Sciences book series} }'
chicago: Hammer, Manfred. “Guided Wave Interaction in Photonic Integrated Circuits
— A Hybrid Analytical/Numerical Approach to Coupled Mode Theory.” In Recent
Trends in Computational Photonics, edited by Arti Agrawal, 204th ed., 204:77–105. Springer
Series in Optical Sciences Book Series. Springer, 2017.
ieee: M. Hammer, “Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid
Analytical/Numerical Approach to Coupled Mode Theory,” in Recent Trends in
Computational Photonics, 204th ed., vol. 204, A. Agrawal, Ed. Springer, 2017,
pp. 77–105.
mla: Hammer, Manfred. “Guided Wave Interaction in Photonic Integrated Circuits —
A Hybrid Analytical/Numerical Approach to Coupled Mode Theory.” Recent Trends
in Computational Photonics, edited by Arti Agrawal, 204th ed., vol. 204, Springer,
2017, pp. 77–105.
short: 'M. Hammer, in: A. Agrawal (Ed.), Recent Trends in Computational Photonics,
204th ed., Springer, 2017, pp. 77–105.'
date_created: 2018-08-01T10:44:00Z
date_updated: 2022-01-06T06:59:34Z
department:
- _id: '61'
edition: '204'
editor:
- first_name: Arti
full_name: Agrawal, Arti
last_name: Agrawal
intvolume: ' 204'
keyword:
- tet_topic_waveguide
- tet_topic_numerics
language:
- iso: eng
page: 77-105
publication: Recent Trends in Computational Photonics
publication_identifier:
isbn:
- 978-3-319-55438-9
publication_status: published
publisher: Springer
series_title: ' Springer Series in Optical Sciences book series'
status: public
title: Guided Wave Interaction in Photonic Integrated Circuits — A Hybrid Analytical/Numerical
Approach to Coupled Mode Theory
type: book_chapter
user_id: '55706'
volume: 204
year: '2017'
...
---
_id: '3828'
abstract:
- lang: eng
text: "The 3D implementation of a hybrid analytical/numerical variant of the coupled-mode
theory is discussed.\r\nEigenmodes of the constituting dielectric channels are
computed numerically. The frequency-domain\r\ncoupled-mode models then combine
these into fully vectorial approximations for the optical electromagnetic\r\nfields
of the composite structure. Following a discretization of amplitude functions
by 1D finite elements, pro-\r\ncedures from the realm of finite-element numerics
are applied to establish systems of linear equations for the then-\r\ndiscrete
modal amplitudes. Examples substantiate the functioning of the technique and allow
for some numerical\r\nassessment. The full 3D simulations are highly efficient
in memory consumption, moderately demanding in com-\r\nputational time, and, in
regimes of low radiative losses, sufficiently accurate for practical design. Our
results\r\ninclude the perturbation of guided modes by changes of the refractive
indices, the interaction of waves in parallel,\r\nhorizontally or vertically coupled
straight waveguides, and a series of crossings of potentially overlapping channels\r\nwith
fairly arbitrary relative positions and orientations."
article_type: original
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: Samer
full_name: Alhaddad, Samer
last_name: Alhaddad
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: 'Hammer M, Alhaddad S, Förstner J. Hybrid coupled-mode modeling in 3D: perturbed
and coupled channels, and waveguide crossings. Journal of the Optical Society
of America B. 2017;34(3):613-624. doi:10.1364/josab.34.000613'
apa: 'Hammer, M., Alhaddad, S., & Förstner, J. (2017). Hybrid coupled-mode modeling
in 3D: perturbed and coupled channels, and waveguide crossings. Journal of
the Optical Society of America B, 34(3), 613–624. https://doi.org/10.1364/josab.34.000613'
bibtex: '@article{Hammer_Alhaddad_Förstner_2017, title={Hybrid coupled-mode modeling
in 3D: perturbed and coupled channels, and waveguide crossings}, volume={34},
DOI={10.1364/josab.34.000613},
number={3}, journal={Journal of the Optical Society of America B}, publisher={The
Optical Society}, author={Hammer, Manfred and Alhaddad, Samer and Förstner, Jens},
year={2017}, pages={613–624} }'
chicago: 'Hammer, Manfred, Samer Alhaddad, and Jens Förstner. “Hybrid Coupled-Mode
Modeling in 3D: Perturbed and Coupled Channels, and Waveguide Crossings.” Journal
of the Optical Society of America B 34, no. 3 (2017): 613–24. https://doi.org/10.1364/josab.34.000613.'
ieee: 'M. Hammer, S. Alhaddad, and J. Förstner, “Hybrid coupled-mode modeling in
3D: perturbed and coupled channels, and waveguide crossings,” Journal of the
Optical Society of America B, vol. 34, no. 3, pp. 613–624, 2017.'
mla: 'Hammer, Manfred, et al. “Hybrid Coupled-Mode Modeling in 3D: Perturbed and
Coupled Channels, and Waveguide Crossings.” Journal of the Optical Society
of America B, vol. 34, no. 3, The Optical Society, 2017, pp. 613–24, doi:10.1364/josab.34.000613.'
short: M. Hammer, S. Alhaddad, J. Förstner, Journal of the Optical Society of America
B 34 (2017) 613–624.
date_created: 2018-08-07T08:40:41Z
date_updated: 2022-01-06T06:59:38Z
ddc:
- '530'
department:
- _id: '61'
doi: 10.1364/josab.34.000613
file:
- access_level: open_access
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-07T09:46:13Z
date_updated: 2018-09-03T14:09:04Z
file_id: '3829'
file_name: 2017-02 Hammer_Hybrid coupled mode modelling in 3D_Perturbed and coupled
channels and waveguide crossings_Coupled Mode Theory JOSA B.pdf
file_size: 5539592
relation: main_file
file_date_updated: 2018-09-03T14:09:04Z
has_accepted_license: '1'
intvolume: ' 34'
issue: '3'
keyword:
- tet_topic_waveguide
- tet_topic_numerics
language:
- iso: eng
oa: '1'
page: 613-624
publication: Journal of the Optical Society of America B
publication_identifier:
issn:
- 0740-3224
- 1520-8540
publication_status: published
publisher: The Optical Society
status: public
title: 'Hybrid coupled-mode modeling in 3D: perturbed and coupled channels, and waveguide
crossings'
type: journal_article
urn: '38287'
user_id: '158'
volume: 34
year: '2017'
...
---
_id: '3830'
abstract:
- lang: eng
text: "The modal properties of curved dielectric slab waveguides are investigated.
We\r\nconsider quasi-confined, attenuated modes that propagate at oblique angles
with respect to\r\nthe axis through the center of curvature. Our analytical model
describes the transition from\r\nscalar 2-D TE/TM bend modes to lossless spiral
waves at near-axis propagation angles,\r\nwith a continuum of vectorial attenuated
spiral modes in between. Modal solutions are\r\ncharacterized in terms of directional
wavenumbers and attenuation constants. Examples for\r\nvectorial mode profiles
illustrate the effects of oblique wave propagation along the curved\r\nslab segments.
For the regime of lossless spiral waves, the relation with the guided modes\r\nof
corresponding dielectric tubes is demonstrated."
article_type: original
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. Spiral modes supported by circular dielectric
tubes and tube segments. Optical and Quantum Electronics. 2017;49(4):49:176.
doi:10.1007/s11082-017-1011-x
apa: Ebers, L., Hammer, M., & Förstner, J. (2017). Spiral modes supported by
circular dielectric tubes and tube segments. Optical and Quantum Electronics,
49(4), 49:176. https://doi.org/10.1007/s11082-017-1011-x
bibtex: '@article{Ebers_Hammer_Förstner_2017, title={Spiral modes supported by circular
dielectric tubes and tube segments}, volume={49}, DOI={10.1007/s11082-017-1011-x},
number={4}, journal={Optical and Quantum Electronics}, publisher={Springer Nature},
author={Ebers, Lena and Hammer, Manfred and Förstner, Jens}, year={2017}, pages={49:176}
}'
chicago: 'Ebers, Lena, Manfred Hammer, and Jens Förstner. “Spiral Modes Supported
by Circular Dielectric Tubes and Tube Segments.” Optical and Quantum Electronics
49, no. 4 (2017): 49:176. https://doi.org/10.1007/s11082-017-1011-x.'
ieee: L. Ebers, M. Hammer, and J. Förstner, “Spiral modes supported by circular
dielectric tubes and tube segments,” Optical and Quantum Electronics, vol.
49, no. 4, p. 49:176, 2017.
mla: Ebers, Lena, et al. “Spiral Modes Supported by Circular Dielectric Tubes and
Tube Segments.” Optical and Quantum Electronics, vol. 49, no. 4, Springer
Nature, 2017, p. 49:176, doi:10.1007/s11082-017-1011-x.
short: L. Ebers, M. Hammer, J. Förstner, Optical and Quantum Electronics 49 (2017)
49:176.
date_created: 2018-08-07T09:52:20Z
date_updated: 2022-01-06T06:59:39Z
ddc:
- '530'
department:
- _id: '61'
doi: 10.1007/s11082-017-1011-x
file:
- access_level: request
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-07T09:56:27Z
date_updated: 2022-01-06T06:59:38Z
file_id: '3831'
file_name: 2017-03 Ebers, Hammer_Spiral modes supported by circular dielectric tubes
and tube segments.pdf
file_size: 2379736
relation: main_file
file_date_updated: 2022-01-06T06:59:38Z
has_accepted_license: '1'
intvolume: ' 49'
issue: '4'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: 49:176
project:
- _id: '53'
name: TRR 142
- _id: '54'
name: TRR 142 - Project Area A
- _id: '62'
name: TRR 142 - Subproject A5
publication: Optical and Quantum Electronics
publication_identifier:
issn:
- 0306-8919
- 1572-817X
publication_status: published
publisher: Springer Nature
status: public
title: Spiral modes supported by circular dielectric tubes and tube segments
type: journal_article
urn: '38308'
user_id: '158'
volume: 49
year: '2017'
...
---
_id: '3543'
author:
- first_name: Andre
full_name: Hildebrandt, Andre
last_name: Hildebrandt
- first_name: Samer
full_name: Alhaddad, Samer
id: '42456'
last_name: Alhaddad
- 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: 'Hildebrandt A, Alhaddad S, Hammer M, Förstner J. Oblique incidence of semi-guided
waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects
in 3D integrated photonic circuits. In: Broquin J-E, Nunzi Conti G, eds. Integrated
Optics: Devices, Materials, and Technologies XX. SPIE; 2016. doi:10.1117/12.2214460'
apa: 'Hildebrandt, A., Alhaddad, S., Hammer, M., & Förstner, J. (2016). Oblique
incidence of semi-guided waves on step-like folds in planar dielectric slabs:
Lossless vertical interconnects in 3D integrated photonic circuits. In J.-E. Broquin
& G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies
XX. SPIE. https://doi.org/10.1117/12.2214460'
bibtex: '@inproceedings{Hildebrandt_Alhaddad_Hammer_Förstner_2016, title={Oblique
incidence of semi-guided waves on step-like folds in planar dielectric slabs:
Lossless vertical interconnects in 3D integrated photonic circuits}, DOI={10.1117/12.2214460},
booktitle={Integrated Optics: Devices, Materials, and Technologies XX}, publisher={SPIE},
author={Hildebrandt, Andre and Alhaddad, Samer and Hammer, Manfred and Förstner,
Jens}, editor={Broquin, Jean-Emmanuel and Nunzi Conti, GualtieroEditors}, year={2016}
}'
chicago: 'Hildebrandt, Andre, Samer Alhaddad, Manfred Hammer, and Jens Förstner.
“Oblique Incidence of Semi-Guided Waves on Step-like Folds in Planar Dielectric
Slabs: Lossless Vertical Interconnects in 3D Integrated Photonic Circuits.” In
Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel
Broquin and Gualtiero Nunzi Conti. SPIE, 2016. https://doi.org/10.1117/12.2214460.'
ieee: 'A. Hildebrandt, S. Alhaddad, M. Hammer, and J. Förstner, “Oblique incidence
of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical
interconnects in 3D integrated photonic circuits,” in Integrated Optics: Devices,
Materials, and Technologies XX, 2016.'
mla: 'Hildebrandt, Andre, et al. “Oblique Incidence of Semi-Guided Waves on Step-like
Folds in Planar Dielectric Slabs: Lossless Vertical Interconnects in 3D Integrated
Photonic Circuits.” Integrated Optics: Devices, Materials, and Technologies
XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti, SPIE, 2016,
doi:10.1117/12.2214460.'
short: 'A. Hildebrandt, S. Alhaddad, M. Hammer, J. Förstner, in: J.-E. Broquin,
G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies
XX, SPIE, 2016.'
date_created: 2018-07-11T09:35:06Z
date_updated: 2022-01-06T06:59:23Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1117/12.2214460
editor:
- first_name: Jean-Emmanuel
full_name: Broquin, Jean-Emmanuel
last_name: Broquin
- first_name: Gualtiero
full_name: Nunzi Conti, Gualtiero
last_name: Nunzi Conti
file:
- access_level: closed
content_type: application/pdf
creator: fossie
date_created: 2018-07-11T09:38:29Z
date_updated: 2018-07-11T09:38:29Z
file_id: '3544'
file_name: 2016-02 Hildebrandt SPIE OPTO 2016.pdf
file_size: 1239213
relation: main_file
success: 1
file_date_updated: 2018-07-11T09:38:29Z
has_accepted_license: '1'
keyword:
- tet_topic_waveguide
language:
- iso: eng
publication: 'Integrated Optics: Devices, Materials, and Technologies XX'
publication_status: published
publisher: SPIE
status: public
title: 'Oblique incidence of semi-guided waves on step-like folds in planar dielectric
slabs: Lossless vertical interconnects in 3D integrated photonic circuits'
type: conference
user_id: '158'
year: '2016'
...
---
_id: '3934'
abstract:
- lang: eng
text: Typical optical integrated circuits combine elements, like straight and curved
waveguides, or cavities, the simulation and design of which is well established
through numerical eigenproblem-solvers. It remains to predict the interaction
of these modes. We address this task by a ”Hybrid” variant (HCMT) of Coupled Mode
Theory. Using methods from finite-element numerics, the optical properties of
a circuit are approximated by superpositions of eigen-solutions for its constituents,
leading to quantitative, low-dimensional, and interpretable models in the frequency
domain. Spectral scans are complemented by the direct computation of supermode
properties (spectral positions and linewidths, coupling-induced phase shifts).
This contribution outlines the theoretical background, and discusses briefly limitations
and implementational details, with the help of an example of a 2-D coupled-resonator-optical-waveguide
configuration.
author:
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
citation:
ama: 'Hammer M. Wave interaction in photonic integrated circuits: Hybrid analytical
/ numerical coupled mode modeling. In: Broquin J-E, Nunzi Conti G, eds. Integrated
Optics: Devices, Materials, and Technologies XX. SPIE; 2016:975018-975018-8.
doi:10.1117/12.2214331'
apa: 'Hammer, M. (2016). Wave interaction in photonic integrated circuits: Hybrid
analytical / numerical coupled mode modeling. In J.-E. Broquin & G. Nunzi
Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX
(pp. 975018-975018–8). San Francisco, USA: SPIE. https://doi.org/10.1117/12.2214331'
bibtex: '@inproceedings{Hammer_2016, title={Wave interaction in photonic integrated
circuits: Hybrid analytical / numerical coupled mode modeling}, DOI={10.1117/12.2214331},
number={9750}, booktitle={Integrated Optics: Devices, Materials, and Technologies
XX}, publisher={SPIE}, author={Hammer, Manfred}, editor={Broquin, Jean-Emmanuel
and Nunzi Conti, GualtieroEditors}, year={2016}, pages={975018-975018–8} }'
chicago: 'Hammer, Manfred. “Wave Interaction in Photonic Integrated Circuits: Hybrid
Analytical / Numerical Coupled Mode Modeling.” In Integrated Optics: Devices,
Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero
Nunzi Conti, 975018-975018–8. SPIE, 2016. https://doi.org/10.1117/12.2214331.'
ieee: 'M. Hammer, “Wave interaction in photonic integrated circuits: Hybrid analytical
/ numerical coupled mode modeling,” in Integrated Optics: Devices, Materials,
and Technologies XX, San Francisco, USA, 2016, no. 9750, pp. 975018-975018–8.'
mla: 'Hammer, Manfred. “Wave Interaction in Photonic Integrated Circuits: Hybrid
Analytical / Numerical Coupled Mode Modeling.” Integrated Optics: Devices,
Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero
Nunzi Conti, no. 9750, SPIE, 2016, pp. 975018-975018–8, doi:10.1117/12.2214331.'
short: 'M. Hammer, in: J.-E. Broquin, G. Nunzi Conti (Eds.), Integrated Optics:
Devices, Materials, and Technologies XX, SPIE, 2016, pp. 975018-975018–8.'
conference:
location: San Francisco, USA
name: Photonics West 2016/OPTO 2016
date_created: 2018-08-20T09:25:13Z
date_updated: 2022-01-06T06:59:56Z
department:
- _id: '61'
doi: 10.1117/12.2214331
editor:
- first_name: Jean-Emmanuel
full_name: Broquin, Jean-Emmanuel
last_name: Broquin
- first_name: Gualtiero
full_name: Nunzi Conti, Gualtiero
last_name: Nunzi Conti
issue: '9750'
keyword:
- tet_topic_waveguide
- tet_topic_numerics
language:
- iso: eng
page: '975018-975018-8 '
publication: 'Integrated Optics: Devices, Materials, and Technologies XX'
publication_status: published
publisher: SPIE
status: public
title: 'Wave interaction in photonic integrated circuits: Hybrid analytical / numerical
coupled mode modeling'
type: conference
user_id: '55706'
year: '2016'
...
---
_id: '3845'
abstract:
- lang: eng
text: The device principle of a prism-based on-chip spectrometer for TE polarization
is introduced. The spectrometer exploits the modal dispersion in planar waveguides
in a layout with slab regions having two different thicknesses of the guiding
layer. The set-up uses parabolic mirrors, for the collimation of light of the
input waveguide and focusing of the light to the receiver waveguides, which relies
on total internal reflection at the interface between two such regions. These
regions are connected adiabatically to prevent unwanted mode conversion and loss
at the edges of the prism. The structure can be fabricated with two wet etching
steps. The paper presents basic theory and a general approach for device optimization.
The latter is illustrated with a numerical example assuming SiON technology.
article_type: original
author:
- first_name: F.
full_name: Civitci, F.
last_name: Civitci
- first_name: Manfred
full_name: Hammer, Manfred
id: '48077'
last_name: Hammer
orcid: 0000-0002-6331-9348
- first_name: H.J.W.M.
full_name: Hoekstra, H.J.W.M.
last_name: Hoekstra
citation:
ama: Civitci F, Hammer M, Hoekstra HJWM. Planar prism spectrometer based on adiabatically
connected waveguiding slabs. Optics Communications. 2015;365:29-37. doi:10.1016/j.optcom.2015.11.066
apa: Civitci, F., Hammer, M., & Hoekstra, H. J. W. M. (2015). Planar prism spectrometer
based on adiabatically connected waveguiding slabs. Optics Communications,
365, 29–37. https://doi.org/10.1016/j.optcom.2015.11.066
bibtex: '@article{Civitci_Hammer_Hoekstra_2015, title={Planar prism spectrometer
based on adiabatically connected waveguiding slabs}, volume={365}, DOI={10.1016/j.optcom.2015.11.066},
journal={Optics Communications}, publisher={Elsevier BV}, author={Civitci, F.
and Hammer, Manfred and Hoekstra, H.J.W.M.}, year={2015}, pages={29–37} }'
chicago: 'Civitci, F., Manfred Hammer, and H.J.W.M. Hoekstra. “Planar Prism Spectrometer
Based on Adiabatically Connected Waveguiding Slabs.” Optics Communications
365 (2015): 29–37. https://doi.org/10.1016/j.optcom.2015.11.066.'
ieee: F. Civitci, M. Hammer, and H. J. W. M. Hoekstra, “Planar prism spectrometer
based on adiabatically connected waveguiding slabs,” Optics Communications,
vol. 365, pp. 29–37, 2015.
mla: Civitci, F., et al. “Planar Prism Spectrometer Based on Adiabatically Connected
Waveguiding Slabs.” Optics Communications, vol. 365, Elsevier BV, 2015,
pp. 29–37, doi:10.1016/j.optcom.2015.11.066.
short: F. Civitci, M. Hammer, H.J.W.M. Hoekstra, Optics Communications 365 (2015)
29–37.
date_created: 2018-08-08T10:27:57Z
date_updated: 2022-01-06T06:59:44Z
ddc:
- '530'
department:
- _id: '61'
doi: 10.1016/j.optcom.2015.11.066
file:
- access_level: closed
content_type: application/pdf
creator: hclaudia
date_created: 2018-08-08T10:31:23Z
date_updated: 2018-08-08T10:31:23Z
file_id: '3846'
file_name: 2016 Hammer_Planar prism spectrometer based on adiabatically connected
waveguiding slabs.pdf
file_size: 1542539
relation: main_file
success: 1
file_date_updated: 2018-08-08T10:31:23Z
has_accepted_license: '1'
intvolume: ' 365'
keyword:
- tet_topic_waveguide
language:
- iso: eng
page: 29-37
publication: Optics Communications
publication_identifier:
issn:
- 0030-4018
publication_status: published
publisher: Elsevier BV
status: public
title: Planar prism spectrometer based on adiabatically connected waveguiding slabs
type: journal_article
user_id: '55706'
volume: 365
year: '2015'
...