Coherent perfect absorption mediated enhancement and optical bistability in phase conjugation

TL;DR

This paper explores how coherent perfect absorption in a nonlinear slab enhances phase conjugation and optical bistability, enabling efficient switching in photonic circuits.

Contribution

It demonstrates that complete absorption of pump waves significantly increases phase conjugation efficiency and introduces multivalued responses for optical switching.

Findings

Enhanced phase conjugation reflectivity due to perfect absorption

Multivalued optical response enabling bistability

Potential for efficient photonic circuit switches

Abstract

We study phase conjugation in a nonlinear composite slab when the counter propagating pump waves are completely absorbed by means of coherent perfect absorption. Under the undepleted pump approximation the coupling constant and the phase conjugated reflectivity are shown to undergo a substantial increase and multivalued response. The effect can be used for efficient switching of the phase conjugated reflectivity in photonic circuits.