Floquet Perfect Absorbers based on Periodically Driven Targets

TL;DR

This paper introduces multichannel Floquet Perfect Absorbers (FPAs), which are periodically driven lossy systems capable of completely absorbing incident waves across a broad frequency range, with reconfigurability and high efficiency.

Contribution

The paper presents a novel Floquet engineering approach to design FPAs that achieve perfect absorption through dynamic modulation, reconfigurability, and critical coupling mechanisms.

Findings

Reconfigurable perfect absorption over broad frequencies

Absorption with infinitesimal local losses

High-Q mode absorption via dynamical mirrors

Abstract

We introduce the concept of multichannel Floquet Perfect Absorbers (FPAs) which are periodically modulated lossy interferometric traps that completely absorb incident monochromatic waves. The proposed FPA protocols utilize a Floquet engineering approach which inflicts a variety of emerging phenomena and features: reconfigurability of perfect absorption (PA) for a broad range of frequencies of the incident wave; PA for infinitesimal local losses, and PA via critical coupling with high-Q modes by inducing back-reflection dynamical mirrors.