---
_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'
...