Metasurfaces with Asymmetric Optical Transfer Functions for Optical Signal Processing

Physical Review Letters
Timothy J DavisAnn Roberts

Abstract

Metasurface thin films created from arrays of structured optical elements have been shown to perform spatial filtering of optical signals. To extend their usefulness it is important that the symmetry of their response with changes to the in-plane wave vector k_{p}→-k_{p} can be tailored or even dynamically tuned. In this Letter we use a general theory of metasurfaces constructed from nondiffracting arrays of coupled metal particles to derive the optical transfer function and identify the physical properties essential for asymmetry. We validate our theory experimentally showing how the asymmetric response of a two-dimensional (planar) metasurface can be optically tuned. Our results set the direction for future developments of metasurfaces for optical signal processing.

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Sep 6, 2018·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Ann RobertsTimothy J Davis
Nov 10, 2018·Physical Review Letters·Hoyeong KwonAndrea Alù

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Citations

Jan 31, 2021·Nature Communications·Tengfeng ZhuShanhui Fan

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