Photonic bound states in the continuum governed by heating

TL;DR

This paper demonstrates a tunable photonic crystal microcavity with liquid crystal layers that exhibit bound states in the continuum, whose properties can be controlled by heating, enabling potential temperature sensing applications.

Contribution

The study introduces a novel thermally tunable photonic crystal microcavity with liquid crystal layers that support bound states in the continuum, observed through multiple vanishing resonant lines.

Findings

Observation of multiple vanishing resonant lines indicating bound states in the continuum

Abrupt linewidth changes near the vanishing points for temperature sensing

Demonstration of thermal tunability in photonic crystal microcavities

Abstract

A photonic crystal microcavity with the liquid crystal resonant layer tunable by heating has been implemented. The multiple vanishing resonant lines corresponding to optical bound states in the continuum are observed. The abrupt behaviour of the resonant linewidth near the vanishing point can be used for temperature sensing.