Tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals

TL;DR

This paper demonstrates a tunable temporal gap using simultaneous fast and slow light in electro-optic photonic crystals, enabling control over light speed and potential applications in temporal cloaking.

Contribution

It introduces a method to dynamically switch between fast and slow light in photonic crystals, creating a controllable temporal gap for the first time.

Findings

Largest temporal gap observed is 541 ps.

Switching between fast and slow light is achieved by adjusting external electric field.

The approach offers a new solution for temporal cloaking applications.

Abstract

We demonstrated a tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals. The light experiences an anomalous dispersion near the transmission center and a normal dispersion away from the center, where it can be accelerated and slowed down, respectively. We also obtained the switch between fast and slow light by adjusting the external electric filed. The observed largest temporal gap is 541 ps, which is crucial in practical event operation inside the gap. The results offer a new solution for temporal cloak.