---
_id: '55989'
abstract:
- lang: eng
  text: Phased arrays are vital in communication systems and have received significant
    interest in the field of optoelectronics and photonics, enabling a wide range
    of applications such as LiDAR, holography, wireless communication, etc. In this
    work, we present a blazed grating antenna that is optimized to have upward radiation
    efficiency as high as 80% with a compact footprint of 3.5 μm × 2 μm at an operational
    wavelength of 1.55 μm. Our numerical investigations demonstrate that this antenna
    in a 64 × 64 phased array configuration is capable of producing desired far-field
    radiation patterns. Additionally, our antenna possesses a low side lobe level
    of -9.7 dB and a negligible reflection efficiency of under 1%, making it an attractive
    candidate for integrated optical phased arrays.
article_type: original
author:
- first_name: Henna
  full_name: Farheen, Henna
  id: '53444'
  last_name: Farheen
  orcid: 0000-0001-7730-3489
- first_name: Suraj
  full_name: Joshi, Suraj
  last_name: Joshi
- first_name: J. Christoph
  full_name: Scheytt, J. Christoph
  id: '37144'
  last_name: Scheytt
  orcid: '0000-0002-5950-6618 '
- first_name: Viktor
  full_name: Myroshnychenko, Viktor
  id: '46371'
  last_name: Myroshnychenko
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
citation:
  ama: 'Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. An efficient
    compact blazed grating antenna for optical phased arrays. <i>Journal of Physics:
    Photonics</i>. 2024;6:045010. doi:<a href="https://doi.org/10.1088/2515-7647/ad6ed4">10.1088/2515-7647/ad6ed4</a>'
  apa: 'Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner,
    J. (2024). An efficient compact blazed grating antenna for optical phased arrays.
    <i>Journal of Physics: Photonics</i>, <i>6</i>, 045010. <a href="https://doi.org/10.1088/2515-7647/ad6ed4">https://doi.org/10.1088/2515-7647/ad6ed4</a>'
  bibtex: '@article{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2024, title={An
    efficient compact blazed grating antenna for optical phased arrays}, volume={6},
    DOI={<a href="https://doi.org/10.1088/2515-7647/ad6ed4">10.1088/2515-7647/ad6ed4</a>},
    journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Farheen,
    Henna and Joshi, Suraj and Scheytt, J. Christoph and Myroshnychenko, Viktor and
    Förstner, Jens}, year={2024}, pages={045010} }'
  chicago: 'Farheen, Henna, Suraj Joshi, J. Christoph Scheytt, Viktor Myroshnychenko,
    and Jens Förstner. “An Efficient Compact Blazed Grating Antenna for Optical Phased
    Arrays.” <i>Journal of Physics: Photonics</i> 6 (2024): 045010. <a href="https://doi.org/10.1088/2515-7647/ad6ed4">https://doi.org/10.1088/2515-7647/ad6ed4</a>.'
  ieee: 'H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
    “An efficient compact blazed grating antenna for optical phased arrays,” <i>Journal
    of Physics: Photonics</i>, vol. 6, p. 045010, 2024, doi: <a href="https://doi.org/10.1088/2515-7647/ad6ed4">10.1088/2515-7647/ad6ed4</a>.'
  mla: 'Farheen, Henna, et al. “An Efficient Compact Blazed Grating Antenna for Optical
    Phased Arrays.” <i>Journal of Physics: Photonics</i>, vol. 6, IOP Publishing,
    2024, p. 045010, doi:<a href="https://doi.org/10.1088/2515-7647/ad6ed4">10.1088/2515-7647/ad6ed4</a>.'
  short: 'H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal
    of Physics: Photonics 6 (2024) 045010.'
date_created: 2024-09-02T12:08:18Z
date_updated: 2024-09-02T12:23:55Z
ddc:
- '530'
department:
- _id: '61'
- _id: '429'
- _id: '58'
doi: 10.1088/2515-7647/ad6ed4
file:
- access_level: open_access
  content_type: application/pdf
  creator: fossie
  date_created: 2024-09-02T12:13:55Z
  date_updated: 2024-09-02T12:13:55Z
  file_id: '55990'
  file_name: 2024-08 Farheen - JPhys Photonics - An efficient compact blazed grating
    antenna for optical phased arrays (official version).pdf
  file_size: 1492402
  relation: main_file
file_date_updated: 2024-09-02T12:13:55Z
has_accepted_license: '1'
intvolume: '         6'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
oa: '1'
page: '045010'
project:
- _id: '266'
  grant_number: PROFILNRW-2020-067
  name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '53'
  grant_number: '231447078'
  name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden
    Konzepten zu funktionellen Strukturen'
- _id: '167'
  grant_number: '231447078'
  name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
    eines photonischen Quantensystems (B06*)'
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 'Journal of Physics: Photonics'
publication_identifier:
  issn:
  - 2515-7647
publication_status: published
publisher: IOP Publishing
status: public
title: An efficient compact blazed grating antenna for optical phased arrays
type: journal_article
user_id: '158'
volume: 6
year: '2024'
...
---
_id: '56193'
abstract:
- lang: eng
  text: 'Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media
    are consid-ered, for operation in the linear regime. We outline and implement
    a largely analytic procedure forrigorous modal analysis of three-layer slabs with
    birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem
    separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in
    X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant
    TE or TM polarization, and with effective indices that depend on the propagation
    directionof the modes, relative to the crystal axes. Strong hybridization can
    be observed for near degeneratemodes in singular configurations without vertical
    symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same
    symmetry class. Dispersion curves for slab thickness and propa-gation angle are
    discussed, for slabs with oxide and air cover. '
author:
- first_name: Manfred
  full_name: Hammer, Manfred
  id: '48077'
  last_name: Hammer
  orcid: 0000-0002-6331-9348
- first_name: Henna
  full_name: Farheen, Henna
  id: '53444'
  last_name: Farheen
  orcid: 0000-0001-7730-3489
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
citation:
  ama: Hammer M, Farheen H, Förstner J. Guided modes of thin-film lithium niobate
    slabs. <i>Optics Continuum</i>. Published online 2024:532822. doi:<a href="https://doi.org/10.1364/optcon.532822">10.1364/optcon.532822</a>
  apa: Hammer, M., Farheen, H., &#38; Förstner, J. (2024). Guided modes of thin-film
    lithium niobate slabs. <i>Optics Continuum</i>, 532822. <a href="https://doi.org/10.1364/optcon.532822">https://doi.org/10.1364/optcon.532822</a>
  bibtex: '@article{Hammer_Farheen_Förstner_2024, title={Guided modes of thin-film
    lithium niobate slabs}, DOI={<a href="https://doi.org/10.1364/optcon.532822">10.1364/optcon.532822</a>},
    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.” <i>Optics Continuum</i>, 2024, 532822. <a href="https://doi.org/10.1364/optcon.532822">https://doi.org/10.1364/optcon.532822</a>.
  ieee: 'M. Hammer, H. Farheen, and J. Förstner, “Guided modes of thin-film lithium
    niobate slabs,” <i>Optics Continuum</i>, p. 532822, 2024, doi: <a href="https://doi.org/10.1364/optcon.532822">10.1364/optcon.532822</a>.'
  mla: Hammer, Manfred, et al. “Guided Modes of Thin-Film Lithium Niobate Slabs.”
    <i>Optics Continuum</i>, Optica Publishing Group, 2024, p. 532822, doi:<a href="https://doi.org/10.1364/optcon.532822">10.1364/optcon.532822</a>.
  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: '63636'
article_type: original
author:
- first_name: Benjamin
  full_name: Hinrichs, Benjamin
  id: '99427'
  last_name: Hinrichs
  orcid: 0000-0001-9074-1205
- first_name: Jonas
  full_name: Lampart, Jonas
  last_name: Lampart
citation:
  ama: Hinrichs B, Lampart J. A Lower Bound on the Critical Momentum of an Impurity
    in a Bose–Einstein Condensate. <i>Comptes Rendus Mathématique</i>. 2024;362(G11):1399-1411.
    doi:<a href="https://doi.org/10.5802/crmath.652">10.5802/crmath.652</a>
  apa: Hinrichs, B., &#38; Lampart, J. (2024). A Lower Bound on the Critical Momentum
    of an Impurity in a Bose–Einstein Condensate. <i>Comptes Rendus. Mathématique</i>,
    <i>362</i>(G11), 1399–1411. <a href="https://doi.org/10.5802/crmath.652">https://doi.org/10.5802/crmath.652</a>
  bibtex: '@article{Hinrichs_Lampart_2024, title={A Lower Bound on the Critical Momentum
    of an Impurity in a Bose–Einstein Condensate}, volume={362}, DOI={<a href="https://doi.org/10.5802/crmath.652">10.5802/crmath.652</a>},
    number={G11}, journal={Comptes Rendus. Mathématique}, publisher={MathDoc/Centre
    Mersenne}, author={Hinrichs, Benjamin and Lampart, Jonas}, year={2024}, pages={1399–1411}
    }'
  chicago: 'Hinrichs, Benjamin, and Jonas Lampart. “A Lower Bound on the Critical
    Momentum of an Impurity in a Bose–Einstein Condensate.” <i>Comptes Rendus. Mathématique</i>
    362, no. G11 (2024): 1399–1411. <a href="https://doi.org/10.5802/crmath.652">https://doi.org/10.5802/crmath.652</a>.'
  ieee: 'B. Hinrichs and J. Lampart, “A Lower Bound on the Critical Momentum of an
    Impurity in a Bose–Einstein Condensate,” <i>Comptes Rendus. Mathématique</i>,
    vol. 362, no. G11, pp. 1399–1411, 2024, doi: <a href="https://doi.org/10.5802/crmath.652">10.5802/crmath.652</a>.'
  mla: Hinrichs, Benjamin, and Jonas Lampart. “A Lower Bound on the Critical Momentum
    of an Impurity in a Bose–Einstein Condensate.” <i>Comptes Rendus. Mathématique</i>,
    vol. 362, no. G11, MathDoc/Centre Mersenne, 2024, pp. 1399–411, doi:<a href="https://doi.org/10.5802/crmath.652">10.5802/crmath.652</a>.
  short: B. Hinrichs, J. Lampart, Comptes Rendus. Mathématique 362 (2024) 1399–1411.
date_created: 2026-01-16T08:43:59Z
date_updated: 2026-01-16T08:45:25Z
department:
- _id: '799'
doi: 10.5802/crmath.652
external_id:
  arxiv:
  - '2311.05361'
intvolume: '       362'
issue: G11
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
page: 1399-1411
project:
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
publication: Comptes Rendus. Mathématique
publication_identifier:
  issn:
  - 1631-073X
  - 1778-3569
publication_status: published
publisher: MathDoc/Centre Mersenne
status: public
title: A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate
type: journal_article
user_id: '99427'
volume: 362
year: '2024'
...
---
_id: '63641'
abstract:
- lang: eng
  text: We present a simple functional integration based proof that the semigroups
    generated by the ultraviolet-renormalized translation-invariant non- and semi-relativistic
    Nelson Hamiltonians are positivity improving (and hence ergodic) with respect
    to the Fröhlich cone for arbitrary values of the total momentum. Our argument
    simplifies known proofs for ergodicity and the result is new in the semi-relativistic
    case.
author:
- first_name: Benjamin
  full_name: Hinrichs, Benjamin
  id: '99427'
  last_name: Hinrichs
  orcid: 0000-0001-9074-1205
- first_name: Fumio
  full_name: Hiroshima, Fumio
  last_name: Hiroshima
citation:
  ama: Hinrichs B, Hiroshima F. On the Ergodicity of Renormalized Translation-Invariant
    Nelson-Type Semigroups. <i>arXiv:241209708</i>. Published online 2024.
  apa: Hinrichs, B., &#38; Hiroshima, F. (2024). On the Ergodicity of Renormalized
    Translation-Invariant Nelson-Type Semigroups. In <i>arXiv:2412.09708</i>.
  bibtex: '@article{Hinrichs_Hiroshima_2024, title={On the Ergodicity of Renormalized
    Translation-Invariant Nelson-Type Semigroups}, journal={arXiv:2412.09708}, author={Hinrichs,
    Benjamin and Hiroshima, Fumio}, year={2024} }'
  chicago: Hinrichs, Benjamin, and Fumio Hiroshima. “On the Ergodicity of Renormalized
    Translation-Invariant Nelson-Type Semigroups.” <i>ArXiv:2412.09708</i>, 2024.
  ieee: B. Hinrichs and F. Hiroshima, “On the Ergodicity of Renormalized Translation-Invariant
    Nelson-Type Semigroups,” <i>arXiv:2412.09708</i>. 2024.
  mla: Hinrichs, Benjamin, and Fumio Hiroshima. “On the Ergodicity of Renormalized
    Translation-Invariant Nelson-Type Semigroups.” <i>ArXiv:2412.09708</i>, 2024.
  short: B. Hinrichs, F. Hiroshima, ArXiv:2412.09708 (2024).
date_created: 2026-01-16T08:56:18Z
date_updated: 2026-01-16T08:56:37Z
department:
- _id: '799'
external_id:
  arxiv:
  - '2412.09708'
language:
- iso: eng
project:
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
publication: arXiv:2412.09708
status: public
title: On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups
type: preprint
user_id: '99427'
year: '2024'
...
---
_id: '63637'
article_type: original
author:
- first_name: Benjamin
  full_name: Hinrichs, Benjamin
  id: '99427'
  last_name: Hinrichs
  orcid: 0000-0001-9074-1205
- first_name: Marius
  full_name: Lemm, Marius
  last_name: Lemm
- first_name: Oliver
  full_name: Siebert, Oliver
  last_name: Siebert
citation:
  ama: Hinrichs B, Lemm M, Siebert O. On Lieb–Robinson Bounds for a Class of Continuum
    Fermions. <i>Annales Henri Poincaré</i>. 2024;26(1):41-80. doi:<a href="https://doi.org/10.1007/s00023-024-01453-y">10.1007/s00023-024-01453-y</a>
  apa: Hinrichs, B., Lemm, M., &#38; Siebert, O. (2024). On Lieb–Robinson Bounds for
    a Class of Continuum Fermions. <i>Annales Henri Poincaré</i>, <i>26</i>(1), 41–80.
    <a href="https://doi.org/10.1007/s00023-024-01453-y">https://doi.org/10.1007/s00023-024-01453-y</a>
  bibtex: '@article{Hinrichs_Lemm_Siebert_2024, title={On Lieb–Robinson Bounds for
    a Class of Continuum Fermions}, volume={26}, DOI={<a href="https://doi.org/10.1007/s00023-024-01453-y">10.1007/s00023-024-01453-y</a>},
    number={1}, journal={Annales Henri Poincaré}, publisher={Springer Science and
    Business Media LLC}, author={Hinrichs, Benjamin and Lemm, Marius and Siebert,
    Oliver}, year={2024}, pages={41–80} }'
  chicago: 'Hinrichs, Benjamin, Marius Lemm, and Oliver Siebert. “On Lieb–Robinson
    Bounds for a Class of Continuum Fermions.” <i>Annales Henri Poincaré</i> 26, no.
    1 (2024): 41–80. <a href="https://doi.org/10.1007/s00023-024-01453-y">https://doi.org/10.1007/s00023-024-01453-y</a>.'
  ieee: 'B. Hinrichs, M. Lemm, and O. Siebert, “On Lieb–Robinson Bounds for a Class
    of Continuum Fermions,” <i>Annales Henri Poincaré</i>, vol. 26, no. 1, pp. 41–80,
    2024, doi: <a href="https://doi.org/10.1007/s00023-024-01453-y">10.1007/s00023-024-01453-y</a>.'
  mla: Hinrichs, Benjamin, et al. “On Lieb–Robinson Bounds for a Class of Continuum
    Fermions.” <i>Annales Henri Poincaré</i>, vol. 26, no. 1, Springer Science and
    Business Media LLC, 2024, pp. 41–80, doi:<a href="https://doi.org/10.1007/s00023-024-01453-y">10.1007/s00023-024-01453-y</a>.
  short: B. Hinrichs, M. Lemm, O. Siebert, Annales Henri Poincaré 26 (2024) 41–80.
date_created: 2026-01-16T08:46:12Z
date_updated: 2026-01-16T09:05:58Z
department:
- _id: '799'
doi: 10.1007/s00023-024-01453-y
external_id:
  arxiv:
  - '2310.17736'
intvolume: '        26'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
page: 41-80
project:
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
publication: Annales Henri Poincaré
publication_identifier:
  issn:
  - 1424-0637
  - 1424-0661
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: On Lieb–Robinson Bounds for a Class of Continuum Fermions
type: journal_article
user_id: '99427'
volume: 26
year: '2024'
...
---
_id: '61251'
abstract:
- lang: eng
  text: <jats:p>We theoretically investigate strategies for the deterministic creation
    of trains of time-bin entangled photons using an individual quantum emitter described
    by a Λ-type electronic system. We explicitly demonstrate the theoretical generation
    of linear cluster states with substantial numbers of entangled photonic qubits
    in full microscopic numerical simulations. The underlying scheme is based on the
    manipulation of ground state coherences through precise optical driving. One important
    finding is that the most easily accessible quality metrics, the achievable rotation
    fidelities, fall short in assessing the actual quantum correlations of the emitted
    photons in the face of losses. To address this, we explicitly calculate stabilizer
    generator expectation values as a superior gauge for the quantum properties of
    the generated many-photon state. With widespread applicability in other emitter
    and excitation–emission schemes also, our work lays the conceptual foundations
    for an in-depth practical analysis of time-bin entanglement based on full numerical
    simulations with predictive capabilities for realistic systems and setups, including
    losses and imperfections. The specific results shown in the present work illustrate
    that with controlled minimization of losses and realistic system parameters for
    quantum-dot type systems, useful linear cluster states of significant lengths
    can be generated in the calculations, discussing the possibility of scalability
    for quantum information processing endeavors.</jats:p>
article_number: '036110'
author:
- first_name: David
  full_name: Bauch, David
  last_name: Bauch
- first_name: Nikolas
  full_name: Köcher, Nikolas
  id: '79191'
  last_name: Köcher
- first_name: Nils
  full_name: Heinisch, Nils
  id: '90283'
  last_name: Heinisch
  orcid: 0009-0006-0984-2097
- first_name: Stefan
  full_name: Schumacher, Stefan
  id: '27271'
  last_name: Schumacher
  orcid: 0000-0003-4042-4951
citation:
  ama: Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic
    generation of linear photonic cluster states. <i>APL Quantum</i>. 2024;1(3). doi:<a
    href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>
  apa: Bauch, D., Köcher, N., Heinisch, N., &#38; Schumacher, S. (2024). Time-bin
    entanglement in the deterministic generation of linear photonic cluster states.
    <i>APL Quantum</i>, <i>1</i>(3), Article 036110. <a href="https://doi.org/10.1063/5.0214197">https://doi.org/10.1063/5.0214197</a>
  bibtex: '@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement
    in the deterministic generation of linear photonic cluster states}, volume={1},
    DOI={<a href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>}, number={3036110},
    journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher,
    Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }'
  chicago: Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin
    Entanglement in the Deterministic Generation of Linear Photonic Cluster States.”
    <i>APL Quantum</i> 1, no. 3 (2024). <a href="https://doi.org/10.1063/5.0214197">https://doi.org/10.1063/5.0214197</a>.
  ieee: 'D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement
    in the deterministic generation of linear photonic cluster states,” <i>APL Quantum</i>,
    vol. 1, no. 3, Art. no. 036110, 2024, doi: <a href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>.'
  mla: Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation
    of Linear Photonic Cluster States.” <i>APL Quantum</i>, vol. 1, no. 3, 036110,
    AIP Publishing, 2024, doi:<a href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>.
  short: D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).
date_created: 2025-09-12T11:08:59Z
date_updated: 2025-09-12T11:11:32Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '429'
- _id: '623'
doi: 10.1063/5.0214197
intvolume: '         1'
issue: '3'
language:
- iso: eng
project:
- _id: '53'
  name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
    zu funktionellen Strukturen'
- _id: '56'
  name: TRR 142 - Project Area C
- _id: '173'
  name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
    bei Telekom Wellenlängen'
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
publication: APL Quantum
publication_identifier:
  issn:
  - 2835-0103
publication_status: published
publisher: AIP Publishing
status: public
title: Time-bin entanglement in the deterministic generation of linear photonic cluster
  states
type: journal_article
user_id: '16199'
volume: 1
year: '2024'
...
---
_id: '62868'
abstract:
- lang: eng
  text: <jats:p>We theoretically investigate strategies for the deterministic creation
    of trains of time-bin entangled photons using an individual quantum emitter described
    by a Λ-type electronic system. We explicitly demonstrate the theoretical generation
    of linear cluster states with substantial numbers of entangled photonic qubits
    in full microscopic numerical simulations. The underlying scheme is based on the
    manipulation of ground state coherences through precise optical driving. One important
    finding is that the most easily accessible quality metrics, the achievable rotation
    fidelities, fall short in assessing the actual quantum correlations of the emitted
    photons in the face of losses. To address this, we explicitly calculate stabilizer
    generator expectation values as a superior gauge for the quantum properties of
    the generated many-photon state. With widespread applicability in other emitter
    and excitation–emission schemes also, our work lays the conceptual foundations
    for an in-depth practical analysis of time-bin entanglement based on full numerical
    simulations with predictive capabilities for realistic systems and setups, including
    losses and imperfections. The specific results shown in the present work illustrate
    that with controlled minimization of losses and realistic system parameters for
    quantum-dot type systems, useful linear cluster states of significant lengths
    can be generated in the calculations, discussing the possibility of scalability
    for quantum information processing endeavors.</jats:p>
article_number: '036110'
author:
- first_name: David
  full_name: Bauch, David
  last_name: Bauch
- first_name: Nikolas
  full_name: Köcher, Nikolas
  id: '79191'
  last_name: Köcher
- first_name: Nils
  full_name: Heinisch, Nils
  id: '90283'
  last_name: Heinisch
  orcid: 0009-0006-0984-2097
- first_name: Stefan
  full_name: Schumacher, Stefan
  id: '27271'
  last_name: Schumacher
  orcid: 0000-0003-4042-4951
citation:
  ama: Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic
    generation of linear photonic cluster states. <i>APL Quantum</i>. 2024;1(3). doi:<a
    href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>
  apa: Bauch, D., Köcher, N., Heinisch, N., &#38; Schumacher, S. (2024). Time-bin
    entanglement in the deterministic generation of linear photonic cluster states.
    <i>APL Quantum</i>, <i>1</i>(3), Article 036110. <a href="https://doi.org/10.1063/5.0214197">https://doi.org/10.1063/5.0214197</a>
  bibtex: '@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement
    in the deterministic generation of linear photonic cluster states}, volume={1},
    DOI={<a href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>}, number={3036110},
    journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher,
    Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }'
  chicago: Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin
    Entanglement in the Deterministic Generation of Linear Photonic Cluster States.”
    <i>APL Quantum</i> 1, no. 3 (2024). <a href="https://doi.org/10.1063/5.0214197">https://doi.org/10.1063/5.0214197</a>.
  ieee: 'D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement
    in the deterministic generation of linear photonic cluster states,” <i>APL Quantum</i>,
    vol. 1, no. 3, Art. no. 036110, 2024, doi: <a href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>.'
  mla: Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation
    of Linear Photonic Cluster States.” <i>APL Quantum</i>, vol. 1, no. 3, 036110,
    AIP Publishing, 2024, doi:<a href="https://doi.org/10.1063/5.0214197">10.1063/5.0214197</a>.
  short: D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).
date_created: 2025-12-04T12:35:53Z
date_updated: 2025-12-05T13:55:00Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '705'
- _id: '35'
- _id: '27'
- _id: '429'
- _id: '230'
- _id: '623'
doi: 10.1063/5.0214197
intvolume: '         1'
issue: '3'
language:
- iso: eng
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '173'
  name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
    bei Telekom Wellenlängen'
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
- _id: '53'
  name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
    zu funktionellen Strukturen'
- _id: '56'
  name: TRR 142 - Project Area C
publication: APL Quantum
publication_identifier:
  issn:
  - 2835-0103
publication_status: published
publisher: AIP Publishing
status: public
title: Time-bin entanglement in the deterministic generation of linear photonic cluster
  states
type: journal_article
user_id: '16199'
volume: 1
year: '2024'
...
---
_id: '47997'
abstract:
- lang: eng
  text: The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising
    material group for applications in quantum and nonlinear optics. The fabrication
    of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric
    domain structures, requires a profound understanding of the material properties
    and crystal structure. In this regard, Raman spectroscopy offers the possibility
    to study and visualize domain structures, strain, defects, and the local stoichiometry,
    which are all factors impacting device performance. However, the accurate interpretation
    of Raman spectra and their changes with respect to extrinsic and intrinsic defects
    requires a thorough assignment of the Raman modes to their respective crystal
    features, which to date is only partly conducted based on phenomenological modelling.
    To address this issue, we calculated the phonon spectra of potassium titanyl phosphate
    and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium
    titanyl arsenate (KTiOAsO4) based on density functional theory and compared them
    with experimental data. Overall, this allows us to assign various spectral features
    to eigenmodes of lattice substructures with improved detail compared to previous
    assignments. Nevertheless, the analysis also shows that not all features of the
    spectra can unambigiously be explained yet. A possible explanation might be that
    defects or long range fields not included in the modeling play a crucial rule
    for the resulting Raman spectrum. In conclusion, this work provides an improved
    foundation into the vibrational properties in the KTiOPO4 material family.
article_number: '1423'
author:
- first_name: Sergej
  full_name: Neufeld, Sergej
  last_name: Neufeld
- first_name: Uwe
  full_name: Gerstmann, Uwe
  id: '171'
  last_name: Gerstmann
  orcid: 0000-0002-4476-223X
- first_name: Laura
  full_name: Padberg, Laura
  id: '40300'
  last_name: Padberg
- first_name: Christof
  full_name: Eigner, Christof
  id: '13244'
  last_name: Eigner
  orcid: https://orcid.org/0000-0002-5693-3083
- first_name: Gerhard
  full_name: Berth, Gerhard
  id: '53'
  last_name: Berth
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Lukas M.
  full_name: Eng, Lukas M.
  last_name: Eng
- first_name: Wolf Gero
  full_name: Schmidt, Wolf Gero
  id: '468'
  last_name: Schmidt
  orcid: 0000-0002-2717-5076
- first_name: Michael
  full_name: Rüsing, Michael
  id: '22501'
  last_name: Rüsing
  orcid: 0000-0003-4682-4577
citation:
  ama: Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium
    Titanyl Phosphate Crystal Family. <i>Crystals</i>. 2023;13(10). doi:<a href="https://doi.org/10.3390/cryst13101423">10.3390/cryst13101423</a>
  apa: Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn,
    C., Eng, L. M., Schmidt, W. G., &#38; Rüsing, M. (2023). Vibrational Properties
    of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>, <i>13</i>(10),
    Article 1423. <a href="https://doi.org/10.3390/cryst13101423">https://doi.org/10.3390/cryst13101423</a>
  bibtex: '@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023,
    title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family},
    volume={13}, DOI={<a href="https://doi.org/10.3390/cryst13101423">10.3390/cryst13101423</a>},
    number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej
    and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard
    and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing,
    Michael}, year={2023} }'
  chicago: Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard
    Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing.
    “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i>
    13, no. 10 (2023). <a href="https://doi.org/10.3390/cryst13101423">https://doi.org/10.3390/cryst13101423</a>.
  ieee: 'S. Neufeld <i>et al.</i>, “Vibrational Properties of the Potassium Titanyl
    Phosphate Crystal Family,” <i>Crystals</i>, vol. 13, no. 10, Art. no. 1423, 2023,
    doi: <a href="https://doi.org/10.3390/cryst13101423">10.3390/cryst13101423</a>.'
  mla: Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate
    Crystal Family.” <i>Crystals</i>, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:<a
    href="https://doi.org/10.3390/cryst13101423">10.3390/cryst13101423</a>.
  short: S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn,
    L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).
date_created: 2023-10-11T09:10:53Z
date_updated: 2023-10-11T09:15:58Z
department:
- _id: '169'
doi: 10.3390/cryst13101423
funded_apc: '1'
intvolume: '        13'
issue: '10'
keyword:
- Inorganic Chemistry
- Condensed Matter Physics
- General Materials Science
- General Chemical Engineering
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.3390/cryst13101423
oa: '1'
project:
- _id: '168'
  grant_number: '231447078'
  name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften
    von Lithiumniobat (B07*)'
- _id: '55'
  name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '266'
  grant_number: PROFILNRW-2020-067
  name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
publication: Crystals
publication_identifier:
  issn:
  - 2073-4352
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family
type: journal_article
user_id: '22501'
volume: 13
year: '2023'
...
---
_id: '50012'
abstract:
- lang: eng
  text: Silicon photonics, in conjunction with complementary metal-oxide-semiconductor
    (CMOS) fabrication, has greatly enhanced the development of integrated optical
    phased arrays. This facilitates a dynamic control of light in a compact form factor
    that enables the synthesis of arbitrary complex wavefronts in the infrared spectrum.
    We numerically demonstrate a large-scale two-dimensional silicon-based optical
    phased array (OPA) composed of nanoantennas with circular gratings that are balanced
    in power and aligned in phase, required for producing elegant radiation patterns
    in the far-field. For a wavelength of 1.55 μm, we optimize two antennas for the
    OPA exhibiting an upward radiation efficiency as high as 90%, with almost 6.8%
    of optical power concentrated in the field of view. Additionally, we believe that
    the proposed OPAs can be easily fabricated and would have the ability to generate
    complex holographic images, rendering them an attractive candidate for a wide
    range of applications like LiDAR sensors, optical trapping, optogenetic stimulation,
    and augmented-reality displays.
author:
- first_name: Henna
  full_name: Farheen, Henna
  id: '53444'
  last_name: Farheen
  orcid: 0000-0001-7730-3489
- first_name: Andreas
  full_name: Strauch, Andreas
  last_name: Strauch
- first_name: J. Christoph
  full_name: Scheytt, J. Christoph
  id: '37144'
  last_name: Scheytt
  orcid: '0000-0002-5950-6618 '
- first_name: Viktor
  full_name: Myroshnychenko, Viktor
  id: '46371'
  last_name: Myroshnychenko
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
citation:
  ama: Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized,
    Highly Efficient Silicon Antennas for Optical Phased Arrays. <i>Photonics and
    Nanostructures - Fundamentals and Applications</i>. 2023;58:101207. doi:<a href="https://doi.org/10.1016/j.photonics.2023.101207">10.1016/j.photonics.2023.101207</a>
  apa: Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner,
    J. (2023). Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.
    <i>Photonics and Nanostructures - Fundamentals and Applications</i>, <i>58</i>,
    101207. <a href="https://doi.org/10.1016/j.photonics.2023.101207">https://doi.org/10.1016/j.photonics.2023.101207</a>
  bibtex: '@article{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized,
    Highly Efficient Silicon Antennas for Optical Phased Arrays}, volume={58}, DOI={<a
    href="https://doi.org/10.1016/j.photonics.2023.101207">10.1016/j.photonics.2023.101207</a>},
    journal={Photonics and Nanostructures - Fundamentals and Applications}, publisher={Elsevier
    BV}, author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and
    Myroshnychenko, Viktor and Förstner, Jens}, year={2023}, pages={101207} }'
  chicago: 'Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko,
    and Jens Förstner. “Optimized, Highly Efficient Silicon Antennas for Optical Phased
    Arrays.” <i>Photonics and Nanostructures - Fundamentals and Applications</i> 58
    (2023): 101207. <a href="https://doi.org/10.1016/j.photonics.2023.101207">https://doi.org/10.1016/j.photonics.2023.101207</a>.'
  ieee: 'H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
    “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays,” <i>Photonics
    and Nanostructures - Fundamentals and Applications</i>, vol. 58, p. 101207, 2023,
    doi: <a href="https://doi.org/10.1016/j.photonics.2023.101207">10.1016/j.photonics.2023.101207</a>.'
  mla: Farheen, Henna, et al. “Optimized, Highly Efficient Silicon Antennas for Optical
    Phased Arrays.” <i>Photonics and Nanostructures - Fundamentals and Applications</i>,
    vol. 58, Elsevier BV, 2023, p. 101207, doi:<a href="https://doi.org/10.1016/j.photonics.2023.101207">10.1016/j.photonics.2023.101207</a>.
  short: H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Photonics
    and Nanostructures - Fundamentals and Applications 58 (2023) 101207.
date_created: 2023-12-21T09:30:03Z
date_updated: 2024-07-22T07:44:33Z
ddc:
- '530'
department:
- _id: '61'
- _id: '230'
- _id: '429'
- _id: '58'
doi: 10.1016/j.photonics.2023.101207
file:
- access_level: open_access
  content_type: application/pdf
  creator: fossie
  date_created: 2023-12-21T09:34:17Z
  date_updated: 2023-12-21T09:34:17Z
  file_id: '50013'
  file_name: 2ß23-12 Farheen - PNFA - Optimized, highly efficient silicon antennas
    for optical phased arrays.pdf
  file_size: 3339442
  relation: main_file
file_date_updated: 2023-12-21T09:34:17Z
has_accepted_license: '1'
intvolume: '        58'
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
oa: '1'
page: '101207'
project:
- _id: '266'
  grant_number: PROFILNRW-2020-067
  name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
  grant_number: '231447078'
  name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
    eines photonischen Quantensystems (B06*)'
- _id: '55'
  name: 'TRR 142 - B: TRR 142 - Project Area B'
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Photonics and Nanostructures - Fundamentals and Applications
publication_identifier:
  issn:
  - 1569-4410
publication_status: published
publisher: Elsevier BV
related_material:
  link:
  - relation: research_data
    url: https://doi.org/10.5281/zenodo.10044122
status: public
title: Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays
type: journal_article
user_id: '158'
volume: 58
year: '2023'
...
---
_id: '50466'
abstract:
- lang: eng
  text: A key challenge in designing efficient optical phased arrays is the lack of
    a well-designed radiator. This work explores horn antennas numerically optimized
    to target high upward radiation efficiency to be employed in silicon-based phased
    arrays capable of producing elegant radiation patterns in the far-field.
author:
- first_name: Henna
  full_name: Farheen, Henna
  id: '53444'
  last_name: Farheen
  orcid: 0000-0001-7730-3489
- first_name: S.
  full_name: Joshi, S.
  last_name: Joshi
- first_name: J. Christoph
  full_name: Scheytt, J. Christoph
  id: '37144'
  last_name: Scheytt
  orcid: '0000-0002-5950-6618 '
- first_name: Viktor
  full_name: Myroshnychenko, Viktor
  id: '46371'
  last_name: Myroshnychenko
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
citation:
  ama: 'Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. Increasing the
    upward radiation efficiency of optical phased arrays using asymmetric silicon
    horn antennas. In: <i>2023 IEEE Photonics Conference (IPC)</i>. IEEE; 2023. doi:<a
    href="https://doi.org/10.1109/ipc57732.2023.10360519">10.1109/ipc57732.2023.10360519</a>'
  apa: Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner,
    J. (2023). Increasing the upward radiation efficiency of optical phased arrays
    using asymmetric silicon horn antennas. <i>2023 IEEE Photonics Conference (IPC)</i>.
    <a href="https://doi.org/10.1109/ipc57732.2023.10360519">https://doi.org/10.1109/ipc57732.2023.10360519</a>
  bibtex: '@inproceedings{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2023, title={Increasing
    the upward radiation efficiency of optical phased arrays using asymmetric silicon
    horn antennas}, DOI={<a href="https://doi.org/10.1109/ipc57732.2023.10360519">10.1109/ipc57732.2023.10360519</a>},
    booktitle={2023 IEEE Photonics Conference (IPC)}, publisher={IEEE}, author={Farheen,
    Henna and Joshi, S. and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner,
    Jens}, year={2023} }'
  chicago: Farheen, Henna, S. Joshi, J. Christoph Scheytt, Viktor Myroshnychenko,
    and Jens Förstner. “Increasing the Upward Radiation Efficiency of Optical Phased
    Arrays Using Asymmetric Silicon Horn Antennas.” In <i>2023 IEEE Photonics Conference
    (IPC)</i>. IEEE, 2023. <a href="https://doi.org/10.1109/ipc57732.2023.10360519">https://doi.org/10.1109/ipc57732.2023.10360519</a>.
  ieee: 'H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner,
    “Increasing the upward radiation efficiency of optical phased arrays using asymmetric
    silicon horn antennas,” 2023, doi: <a href="https://doi.org/10.1109/ipc57732.2023.10360519">10.1109/ipc57732.2023.10360519</a>.'
  mla: Farheen, Henna, et al. “Increasing the Upward Radiation Efficiency of Optical
    Phased Arrays Using Asymmetric Silicon Horn Antennas.” <i>2023 IEEE Photonics
    Conference (IPC)</i>, IEEE, 2023, doi:<a href="https://doi.org/10.1109/ipc57732.2023.10360519">10.1109/ipc57732.2023.10360519</a>.
  short: 'H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in:
    2023 IEEE Photonics Conference (IPC), IEEE, 2023.'
date_created: 2024-01-12T07:37:54Z
date_updated: 2024-07-22T07:48:53Z
department:
- _id: '61'
- _id: '230'
- _id: '429'
doi: 10.1109/ipc57732.2023.10360519
keyword:
- tet_topic_opticalantenna
language:
- iso: eng
project:
- _id: '266'
  grant_number: PROFILNRW-2020-067
  name: 'PhoQC: PhoQC: Photonisches Quantencomputing'
- _id: '167'
  grant_number: '231447078'
  name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle
    eines photonischen Quantensystems (B06*)'
- _id: '75'
  grant_number: '231447078'
  name: 'TRR 142 - C05: TRR 142 - Nichtlineare optische Oberflächen basierend auf
    ZnO-plasmonischen Hybrid-Nanostrukturen (C05)'
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 2023 IEEE Photonics Conference (IPC)
publication_status: published
publisher: IEEE
status: public
title: Increasing the upward radiation efficiency of optical phased arrays using asymmetric
  silicon horn antennas
type: conference
user_id: '158'
year: '2023'
...
---
_id: '61252'
abstract:
- lang: eng
  text: <jats:title>Abstract</jats:title><jats:p>The biexciton‐exciton emission cascade
    commonly used in quantum‐dot systems to generate polarization entanglement yields
    photons with intrinsically limited indistinguishability. In the present work,
    it focuses on the generation of pairs of photons with high degrees of polarization
    entanglement and simultaneously high indistinguishability. It achieves this goal
    by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates
    that a suitably tailored circular Bragg reflector fulfills the requirements of
    sufficient selective Purcell enhancement of biexciton emission paired with spectrally
    broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical
    study combines (i) the optimization of realistic photonic structures solving Maxwell's
    equations from which model parameters are extracted as input for (ii) microscopic
    simulations of quantum‐dot cavity excitation dynamics with full access to photon
    properties. It reports non‐trivial dependencies on system parameters and use the
    predictive power of the combined theoretical approach to determine the optimal
    range of Purcell enhancement that maximizes indistinguishability and entanglement
    to near unity values, here specifically for the telecom C‐band at 1550 nm.</jats:p>
article_number: '2300142'
author:
- first_name: David
  full_name: Bauch, David
  last_name: Bauch
- first_name: Dustin
  full_name: Siebert, Dustin
  last_name: Siebert
- first_name: Klaus D.
  full_name: Jöns, Klaus D.
  id: '85353'
  last_name: Jöns
- first_name: Jens
  full_name: Förstner, Jens
  id: '158'
  last_name: Förstner
  orcid: 0000-0001-7059-9862
- first_name: Stefan
  full_name: Schumacher, Stefan
  id: '27271'
  last_name: Schumacher
  orcid: 0000-0003-4042-4951
citation:
  ama: Bauch D, Siebert D, Jöns KD, Förstner J, Schumacher S. On‐Demand Indistinguishable
    and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>.
    2023;7(1). doi:<a href="https://doi.org/10.1002/qute.202300142">10.1002/qute.202300142</a>
  apa: Bauch, D., Siebert, D., Jöns, K. D., Förstner, J., &#38; Schumacher, S. (2023).
    On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.
    <i>Advanced Quantum Technologies</i>, <i>7</i>(1), Article 2300142. <a href="https://doi.org/10.1002/qute.202300142">https://doi.org/10.1002/qute.202300142</a>
  bibtex: '@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand
    Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, volume={7},
    DOI={<a href="https://doi.org/10.1002/qute.202300142">10.1002/qute.202300142</a>},
    number={12300142}, journal={Advanced Quantum Technologies}, publisher={Wiley},
    author={Bauch, David and Siebert, Dustin and Jöns, Klaus D. and Förstner, Jens
    and Schumacher, Stefan}, year={2023} }'
  chicago: Bauch, David, Dustin Siebert, Klaus D. Jöns, Jens Förstner, and Stefan
    Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored
    Cavity Designs.” <i>Advanced Quantum Technologies</i> 7, no. 1 (2023). <a href="https://doi.org/10.1002/qute.202300142">https://doi.org/10.1002/qute.202300142</a>.
  ieee: 'D. Bauch, D. Siebert, K. D. Jöns, J. Förstner, and S. Schumacher, “On‐Demand
    Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” <i>Advanced
    Quantum Technologies</i>, vol. 7, no. 1, Art. no. 2300142, 2023, doi: <a href="https://doi.org/10.1002/qute.202300142">10.1002/qute.202300142</a>.'
  mla: Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using
    Tailored Cavity Designs.” <i>Advanced Quantum Technologies</i>, vol. 7, no. 1,
    2300142, Wiley, 2023, doi:<a href="https://doi.org/10.1002/qute.202300142">10.1002/qute.202300142</a>.
  short: D. Bauch, D. Siebert, K.D. Jöns, J. Förstner, S. Schumacher, Advanced Quantum
    Technologies 7 (2023).
date_created: 2025-09-12T11:11:56Z
date_updated: 2025-09-12T11:16:12Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '642'
- _id: '61'
- _id: '230'
- _id: '35'
- _id: '34'
- _id: '429'
- _id: '27'
- _id: '623'
doi: 10.1002/qute.202300142
intvolume: '         7'
issue: '1'
language:
- iso: eng
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '53'
  name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten
    zu funktionellen Strukturen'
- _id: '55'
  name: TRR 142 - Project Area B
- _id: '56'
  name: TRR 142 - Project Area C
- _id: '167'
  name: 'TRR 142; TP B06: Ultraschnelle kohärente opto-elektronische Kontrolle eines
    photonischen Quantensystems'
- _id: '173'
  name: 'TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch
    bei Telekom Wellenlängen'
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
publication: Advanced Quantum Technologies
publication_identifier:
  issn:
  - 2511-9044
  - 2511-9044
publication_status: published
publisher: Wiley
status: public
title: On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs
type: journal_article
user_id: '16199'
volume: 7
year: '2023'
...
---
_id: '61266'
abstract:
- lang: eng
  text: <jats:p>This review examines the use of continuous-variable spectroscopy techniques
    for investigating quantum coherence and light-matter interactions in semiconductor
    systems with ultrafast dynamics. Special emphasis is placed on multichannel homodyne
    detection as a powerful tool to measure the quantum coherence and the full density
    matrix of a polariton system. Observations, such as coherence times that exceed
    the nanosecond scale obtained by monitoring the temporal decay of quantum coherence
    in a polariton condensate, are discussed. Proof-of-concept experiments and numerical
    simulations that demonstrate the enhanced resourcefulness of the produced system
    states for modern quantum protocols are assessed. The combination of tailored
    resource quantifiers and ultrafast spectroscopy techniques that have recently
    been demonstrated paves the way for future applications of quantum information
    technologies.</jats:p>
article_number: '2997'
author:
- first_name: Carolin
  full_name: Lüders, Carolin
  last_name: Lüders
- first_name: Franziska
  full_name: Barkhausen, Franziska
  id: '63631'
  last_name: Barkhausen
- first_name: Matthias
  full_name: Pukrop, Matthias
  last_name: Pukrop
- first_name: Elena
  full_name: Rozas, Elena
  last_name: Rozas
- first_name: Jan
  full_name: Sperling, Jan
  id: '75127'
  last_name: Sperling
  orcid: 0000-0002-5844-3205
- first_name: Stefan
  full_name: Schumacher, Stefan
  id: '27271'
  last_name: Schumacher
  orcid: 0000-0003-4042-4951
- first_name: Marc
  full_name: Aßmann, Marc
  last_name: Aßmann
citation:
  ama: Lüders C, Barkhausen F, Pukrop M, et al. Continuous-variable quantum optics
    and resource theory for ultrafast semiconductor spectroscopy [Invited]. <i>Optical
    Materials Express</i>. 2023;13(11). doi:<a href="https://doi.org/10.1364/ome.497006">10.1364/ome.497006</a>
  apa: Lüders, C., Barkhausen, F., Pukrop, M., Rozas, E., Sperling, J., Schumacher,
    S., &#38; Aßmann, M. (2023). Continuous-variable quantum optics and resource theory
    for ultrafast semiconductor spectroscopy [Invited]. <i>Optical Materials Express</i>,
    <i>13</i>(11), Article 2997. <a href="https://doi.org/10.1364/ome.497006">https://doi.org/10.1364/ome.497006</a>
  bibtex: '@article{Lüders_Barkhausen_Pukrop_Rozas_Sperling_Schumacher_Aßmann_2023,
    title={Continuous-variable quantum optics and resource theory for ultrafast semiconductor
    spectroscopy [Invited]}, volume={13}, DOI={<a href="https://doi.org/10.1364/ome.497006">10.1364/ome.497006</a>},
    number={112997}, journal={Optical Materials Express}, publisher={Optica Publishing
    Group}, author={Lüders, Carolin and Barkhausen, Franziska and Pukrop, Matthias
    and Rozas, Elena and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}, year={2023}
    }'
  chicago: Lüders, Carolin, Franziska Barkhausen, Matthias Pukrop, Elena Rozas, Jan
    Sperling, Stefan Schumacher, and Marc Aßmann. “Continuous-Variable Quantum Optics
    and Resource Theory for Ultrafast Semiconductor Spectroscopy [Invited].” <i>Optical
    Materials Express</i> 13, no. 11 (2023). <a href="https://doi.org/10.1364/ome.497006">https://doi.org/10.1364/ome.497006</a>.
  ieee: 'C. Lüders <i>et al.</i>, “Continuous-variable quantum optics and resource
    theory for ultrafast semiconductor spectroscopy [Invited],” <i>Optical Materials
    Express</i>, vol. 13, no. 11, Art. no. 2997, 2023, doi: <a href="https://doi.org/10.1364/ome.497006">10.1364/ome.497006</a>.'
  mla: Lüders, Carolin, et al. “Continuous-Variable Quantum Optics and Resource Theory
    for Ultrafast Semiconductor Spectroscopy [Invited].” <i>Optical Materials Express</i>,
    vol. 13, no. 11, 2997, Optica Publishing Group, 2023, doi:<a href="https://doi.org/10.1364/ome.497006">10.1364/ome.497006</a>.
  short: C. Lüders, F. Barkhausen, M. Pukrop, E. Rozas, J. Sperling, S. Schumacher,
    M. Aßmann, Optical Materials Express 13 (2023).
date_created: 2025-09-12T11:40:26Z
date_updated: 2025-09-12T11:41:42Z
department:
- _id: '15'
- _id: '170'
- _id: '297'
- _id: '706'
- _id: '35'
- _id: '230'
- _id: '27'
- _id: '623'
doi: 10.1364/ome.497006
intvolume: '        13'
issue: '11'
language:
- iso: eng
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '266'
  name: 'PhoQC: Photonisches Quantencomputing'
publication: Optical Materials Express
publication_identifier:
  issn:
  - 2159-3930
publication_status: published
publisher: Optica Publishing Group
status: public
title: Continuous-variable quantum optics and resource theory for ultrafast semiconductor
  spectroscopy [Invited]
type: journal_article
user_id: '16199'
volume: 13
year: '2023'
...
