# Self-Regulated Transport in Photonic Crystals with Phase-Changing Defects

## TL;DR

This paper explores how integrating phase-changing materials into photonic crystals enables self-regulated light transmission, with potential applications in optical sensing and limiting, driven by light-induced phase transitions.

## Contribution

It demonstrates through numerical analysis that embedding PCM in photonic structures significantly alters light-induced phase transition effects compared to standalone PCM.

## Key findings

- Enhanced control of light transmission via PCM in photonic structures
- Potential for improved optical sensors and limiters
- Significant modification of phase transition behavior

## Abstract

Phase changing materials (PCM) are widely used for optical data recording, sensing, all-optical switching, and optical limiting. Our focus here is on the case when the change in the transmission characteristics of the optical material is caused by the input light itself. Specifically, the light-induced heating triggers the phase transition in the PCM. In this paper, using a numerical example, we demonstrate that incorporating the PCM in a photonic structure can lead to a dramatic modification of the effects of light-induced phase transition, as compared to a stand-alone sample of the same PCM. Our focus is on short pulses. We discuss some possible applications of such phase-changing photonic structures for optical sensing and limiting.