Resonant response in tunable metasurface based on crossed all-dielectric gratings

TL;DR

This paper demonstrates how mechanically tuning the crossing angle of dielectric gratings in a metasurface can control its spectral response, enabling flexible polarization-sensitive optical devices.

Contribution

It introduces a novel mechanically tunable dielectric metasurface using crossed gratings to control spectral response over a wide frequency range.

Findings

Mechanical adjustment of crossing angle shifts spectral response.

The metasurface exhibits polarization sensitivity.

Potential applications in flexible optical devices.

Abstract

We theoretically demonstrate mechanical tuning of the spectral response of a Mie-like resonant dielectric metasurface consisting of crossed all-dielectric strip gratings. We use two array of parallel dielectric strips superimposed on each other to mechanically alter the crossing angle between them thereby changing the position of the maximum of the spectral response in a wide frequency range. The metasurface structure is considered as a doubly-periodic system in an oblique mesh. This mechanically controllable metasurface can be perspective in developing of a flexible polarization-sensitive optical devices.