Nonlocal metasurface for circularly polarized light detection
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 20, 2023
- Source ID
- 10.1364/optica.468252
Entities
People
- Jiho Hong
- Jorik van de Groep
- Mark L. Brongersma
- Nayeun Lee
- Philippe Lalanne
- Pieter G Kik
- Soo Jin Kim
Organizations
- Air Force Office of Scientific Research
- Korea University
- National Science Foundation
- Stanford University
- United States Department of Energy
- University of Amsterdam
- University of Bordeaux
- University of Central Florida