Nonlocal metasurface for circularly polarized light detection

Jiho Hong, Jorik van de Groep, Nayeun Lee, Soo Jin Kim, Philippe Lalanne, Pieter G. Kik, Mark L. Brongersma

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Modern-day sensing and imaging applications increasingly rely on accurate measurements of the primary physical quantities associated with light waves: intensity, wavelength, directionality, and polarization. These are conventionally performed with a series of bulky optical elements, but recently, it has been recognized that optical resonances in nanostructures can be engineered to achieve selective photodetection of light waves with a specific set of predetermined properties. Here, we theoretically illustrate how a thin silicon layer can be patterned into a dislocated nanowire-array that affords detection of circularly polarized light with an efficiency that reaches the theoretical limit for circular dichroism of a planar detector in a symmetric external environment. The presence of a periodic arrangement of dislocations is essential in achieving such unparalleled performance as they enable selective excitation of nonlocal, guided-mode resonances for one handedness of light. We also experimentally demonstrate compact, high-performance chiral photodetectors created from these dislocated nanowire-arrays. This work highlights the critical role defects can play in enabling new nanophotonic functions and devices.

Original languageEnglish
Pages (from-to)134-141
Number of pages8
JournalOptica
Volume10
Issue number1
DOIs
Publication statusPublished - 2023 Jan
Externally publishedYes

Bibliographical note

Funding Information:
Acknowledgment. We would like to acknowledge support from an individual investigator from the Airforce, a Multidisciplinary University Research Initiative from the Air Force Office of Scientific Research, and from the Department of Energy. Part of this work was performed at the Stanford Nano Shared Facilities (SNSF) and the Stanford Nanofabrication Facility (SNF), supported by the National Science Foundation.

Funding Information:
Funding. Air Force Office of Scientific Research (FA9550-18-1-0323, FA9550-21-1-0312); U.S. Department of Energy (DE-FG07-ER46426); National Science Foundation (ECCS-2026822).

Publisher Copyright:
© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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