Time-reversal in dynamically-tuned zero-gap periodic systems

TL;DR

This paper demonstrates a method for achieving 100% efficient time-reversal of broadband pulses in zero-gap periodic systems through weak, non-adiabatic tuning of wave velocity, enabling new applications.

Contribution

It introduces a novel, simple scheme for broadband pulse time-reversal in zero-gap systems using slow, non-adiabatic tuning, surpassing previous limitations.

Findings

Achieves 100% pulse reversal efficiency.

Works with broadband, few-cycle pulses.

Applicable to various physical systems.

Abstract

We show that short pulses propagating in zero-gap periodic systems can be reversed with 100% efficiency by using weak non-adiabatic tuning of the wave velocity at time-scales that can be much slower than the period. Unlike previous schemes, we demonstrate reversal of {\em broadband} (few cycle) pulses with simple structures. Our scheme may thus open the way to time-reversal in a variety of systems for which it was not accessible before.