Floquet Engineering of Polaritonic Amplification in Dispersive Photonic Time Crystals

TL;DR

This paper explores how dispersive photonic time crystals can be engineered using periodic dispersion modulation to create hybrid bandgaps, enabling light amplification with lower modulation frequencies, advancing polaritonic devices.

Contribution

It introduces a theoretical and numerical analysis of dispersive PTCs, revealing hybrid bandgap formation and enhanced amplification capabilities compared to non-dispersive systems.

Findings

Hybrid bandgaps emerge from polaritonic branch interactions.

Dispersive PTCs enable light amplification at lower modulation frequencies.

Potential applications include polaritonic lasing and Raman scattering.

Abstract

In this study, we investigate the dynamics of dispersive photonic time crystals (PTCs) and their potential applications for controlling light-matter interaction. By employing the Lorentz-Drude model, we analyze theoretically and via numerical simulation the effects of periodic modulation of dispersion parameters, revealing the emergence of hybrid bandgaps from interaction of polaritonic branches with unique characteristics. Our study demonstrates that dispersive PTCs offer novel excitation channels and amplification possibilities, that require lower modulation frequencies compared to non-dispersive systems thus alleviating experimental challenges for the realization of PTCs in the optical regime. These findings pave the way for advancements in polaritonic lasing and resonant Raman scattering.