# Active tuning of high-Q dielectric metasurfaces

## TL;DR

This paper demonstrates active tuning of high-Q dielectric metasurfaces by embedding silicon meta-atoms with liquid crystals, enabling control over resonance properties through heating, and showing potential for tunable narrow-band filters.

## Contribution

The study introduces a method for actively tuning high-Q dielectric metasurfaces using liquid crystals, achieving significant resonance shifts and advancing tunable optical filter technology.

## Key findings

- High-Q resonances ($Q=270 ext{±}30$) can be tuned over more than three resonance widths.
- Embedding liquid crystals enables active control of the metasurface's optical properties.
- The approach demonstrates the feasibility of tunable narrow-band filters based on dielectric metasurfaces.

## Abstract

We demonstrate the active tuning of all-dielectric metasurfaces exhibiting high-quality factor (high-Q) resonances. The active control is provided by embedding the asymmetric silicon meta-atoms with liquid crystals, which allows the relative index of refraction to be controlled through heating. It is found that high quality factor resonances ($Q=270\pm30$) can be tuned over more than three resonance widths. Our results demonstrate the feasibility of using all-dielectric metasurfaces to construct tunable narrow-band filters.