---
_id: '65316'
abstract:
- lang: eng
  text: Metasurfaces are powerful tools for manipulating light using small structures
    on the nanoscale. In most metasurfaces, near-field couplings are treated as being
    unfavorable perturbations. Here, we experimentally investigate a structure consisting
    of sinusoidally modulated silicon waveguides where near-field coupling of local
    resonances leads to negative coupling, i.e., a negative coupling constant. This
    gives rise to wave-vector-dependent eigenstates of elliptical, linear, and circular
    polarizations. In particular, fully circular polarization states are not only
    present at a single point in momentum space (k-space) but also along a line. This
    circular polarization line, as well as a linear polarization line, emanates from
    a polarization degeneracy at the Dirac point. We experimentally validate the existence
    of these eigenstates and demonstrate the energy-, polarization-, and wave vector
    dependence of this metasurface as well as its sensitivity to fabrication tolerances.
    By tuning the incident k-vector, certain polarization-energy eigenstates are strongly
    reflected, allowing for uses in angle-tunable polarization filters and light sources.
author:
- first_name: Helene
  full_name: Wetter, Helene
  last_name: Wetter
- first_name: Jan
  full_name: Wingenbach, Jan
  id: '69187'
  last_name: Wingenbach
- first_name: Falk
  full_name: Rehberg, Falk
  last_name: Rehberg
- first_name: Wenlong
  full_name: Gao, Wenlong
  last_name: Gao
- first_name: Stefan
  full_name: Schumacher, Stefan
  id: '27271'
  last_name: Schumacher
  orcid: 0000-0003-4042-4951
- first_name: Thomas
  full_name: Zentgraf, Thomas
  id: '30525'
  last_name: Zentgraf
  orcid: 0000-0002-8662-1101
citation:
  ama: Wetter H, Wingenbach J, Rehberg F, Gao W, Schumacher S, Zentgraf T. Polarization-
    and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. <i>ACS
    Photonics</i>. 2026;13:2128-2133. doi:<a href="https://doi.org/10.1021/acsphotonics.5c02865">10.1021/acsphotonics.5c02865</a>
  apa: Wetter, H., Wingenbach, J., Rehberg, F., Gao, W., Schumacher, S., &#38; Zentgraf,
    T. (2026). Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field
    Coupling. <i>ACS Photonics</i>, <i>13</i>, 2128–2133. <a href="https://doi.org/10.1021/acsphotonics.5c02865">https://doi.org/10.1021/acsphotonics.5c02865</a>
  bibtex: '@article{Wetter_Wingenbach_Rehberg_Gao_Schumacher_Zentgraf_2026, title={Polarization-
    and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}, volume={13},
    DOI={<a href="https://doi.org/10.1021/acsphotonics.5c02865">10.1021/acsphotonics.5c02865</a>},
    journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Wetter,
    Helene and Wingenbach, Jan and Rehberg, Falk and Gao, Wenlong and Schumacher,
    Stefan and Zentgraf, Thomas}, year={2026}, pages={2128–2133} }'
  chicago: 'Wetter, Helene, Jan Wingenbach, Falk Rehberg, Wenlong Gao, Stefan Schumacher,
    and Thomas Zentgraf. “Polarization- and Wave-Vector Selective Optical Metasurface
    with Near-Field Coupling.” <i>ACS Photonics</i> 13 (2026): 2128–33. <a href="https://doi.org/10.1021/acsphotonics.5c02865">https://doi.org/10.1021/acsphotonics.5c02865</a>.'
  ieee: 'H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, and T. Zentgraf,
    “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling,”
    <i>ACS Photonics</i>, vol. 13, pp. 2128–2133, 2026, doi: <a href="https://doi.org/10.1021/acsphotonics.5c02865">10.1021/acsphotonics.5c02865</a>.'
  mla: Wetter, Helene, et al. “Polarization- and Wave-Vector Selective Optical Metasurface
    with Near-Field Coupling.” <i>ACS Photonics</i>, vol. 13, American Chemical Society
    (ACS), 2026, pp. 2128–33, doi:<a href="https://doi.org/10.1021/acsphotonics.5c02865">10.1021/acsphotonics.5c02865</a>.
  short: H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, T. Zentgraf,
    ACS Photonics 13 (2026) 2128–2133.
date_created: 2026-04-02T07:25:30Z
date_updated: 2026-04-20T05:09:57Z
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1021/acsphotonics.5c02865
external_id:
  arxiv:
  - '2512.14452'
intvolume: '        13'
keyword:
- metasurface
- waveguides
- Dirac point
- polarization
- negative coupling
language:
- iso: eng
main_file_link:
- url: https://pubs.acs.org/doi/10.1021/acsphotonics.5c02865
page: 2128-2133
publication: ACS Photonics
publication_identifier:
  issn:
  - 2330-4022
  - 2330-4022
publication_status: published
publisher: American Chemical Society (ACS)
quality_controlled: '1'
status: public
title: Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field
  Coupling
type: journal_article
user_id: '30525'
volume: 13
year: '2026'
...
---
_id: '39027'
abstract:
- lang: eng
  text: We experimentally investigate the generation of continuous-wave optical squeezing
    from a titanium-indiffused lithium niobate waveguide resonator at low and high
    frequencies. The device promises integration with different platform chips for
    more complex optical systems.
author:
- first_name: Renato R.
  full_name: Domeneguetti, Renato R.
  last_name: Domeneguetti
- first_name: Hauke
  full_name: Conradi, Hauke
  last_name: Conradi
- first_name: Moritz
  full_name: Kleinert, Moritz
  last_name: Kleinert
- first_name: Christian
  full_name: Kießler, Christian
  id: '44252'
  last_name: Kießler
- first_name: Michael
  full_name: Stefszky, Michael
  id: '42777'
  last_name: Stefszky
- first_name: Harald
  full_name: Herrmann, Harald
  id: '216'
  last_name: Herrmann
- first_name: Christine
  full_name: Silberhorn, Christine
  id: '26263'
  last_name: Silberhorn
- first_name: Ulrik L.
  full_name: Andersen, Ulrik L.
  last_name: Andersen
- first_name: Jonas Schou
  full_name: Neergaard-Nielsen, Jonas Schou
  last_name: Neergaard-Nielsen
- first_name: Tobias
  full_name: Gehring, Tobias
  last_name: Gehring
citation:
  ama: 'Domeneguetti RR, Conradi H, Kleinert M, et al. Nonlinear waveguides for integrated
    quantum light source. In: <i>2021 Conference on Lasers and Electro-Optics Europe
    and European Quantum Electronics Conference</i>. Optica Publishing Group; 2021:eb_4_1.'
  apa: Domeneguetti, R. R., Conradi, H., Kleinert, M., Kießler, C., Stefszky, M.,
    Herrmann, H., Silberhorn, C., Andersen, U. L., Neergaard-Nielsen, J. S., &#38;
    Gehring, T. (2021). Nonlinear waveguides for integrated quantum light source.
    <i>2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics
    Conference</i>, eb_4_1.
  bibtex: '@inproceedings{Domeneguetti_Conradi_Kleinert_Kießler_Stefszky_Herrmann_Silberhorn_Andersen_Neergaard-Nielsen_Gehring_2021,
    title={Nonlinear waveguides for integrated quantum light source}, booktitle={2021
    Conference on Lasers and Electro-Optics Europe and European Quantum Electronics
    Conference}, publisher={Optica Publishing Group}, author={Domeneguetti, Renato
    R. and Conradi, Hauke and Kleinert, Moritz and Kießler, Christian and Stefszky,
    Michael and Herrmann, Harald and Silberhorn, Christine and Andersen, Ulrik L.
    and Neergaard-Nielsen, Jonas Schou and Gehring, Tobias}, year={2021}, pages={eb_4_1}
    }'
  chicago: Domeneguetti, Renato R., Hauke Conradi, Moritz Kleinert, Christian Kießler,
    Michael Stefszky, Harald Herrmann, Christine Silberhorn, Ulrik L. Andersen, Jonas
    Schou Neergaard-Nielsen, and Tobias Gehring. “Nonlinear Waveguides for Integrated
    Quantum Light Source.” In <i>2021 Conference on Lasers and Electro-Optics Europe
    and European Quantum Electronics Conference</i>, eb_4_1. Optica Publishing Group,
    2021.
  ieee: R. R. Domeneguetti <i>et al.</i>, “Nonlinear waveguides for integrated quantum
    light source,” in <i>2021 Conference on Lasers and Electro-Optics Europe and European
    Quantum Electronics Conference</i>, 2021, p. eb_4_1.
  mla: Domeneguetti, Renato R., et al. “Nonlinear Waveguides for Integrated Quantum
    Light Source.” <i>2021 Conference on Lasers and Electro-Optics Europe and European
    Quantum Electronics Conference</i>, Optica Publishing Group, 2021, p. eb_4_1.
  short: 'R.R. Domeneguetti, H. Conradi, M. Kleinert, C. Kießler, M. Stefszky, H.
    Herrmann, C. Silberhorn, U.L. Andersen, J.S. Neergaard-Nielsen, T. Gehring, in:
    2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics
    Conference, Optica Publishing Group, 2021, p. eb_4_1.'
date_created: 2023-01-24T08:06:33Z
date_updated: 2026-01-16T10:21:27Z
department:
- _id: '15'
- _id: '288'
keyword:
- Optical systems
- Polymer waveguides
- Quantum key distribution
- Quantum light sources
- Squeezed states
- Waveguides
language:
- iso: eng
page: eb_4_1
publication: 2021 Conference on Lasers and Electro-Optics Europe and European Quantum
  Electronics Conference
publisher: Optica Publishing Group
status: public
title: Nonlinear waveguides for integrated quantum light source
type: conference
user_id: '42777'
year: '2021'
...