Nonlinear Mach-Zehnder-Fano interferometer

TL;DR

This paper introduces a nonlinear Mach-Zehnder-Fano interferometer that leverages hybrid resonant states for enhanced phase control and low-threshold all-optical switching using photonic crystal circuits.

Contribution

It presents a novel interferometer design combining nonlinear Fano resonances with loop interactions for advanced phase manipulation and efficient optical switching.

Findings

Hybrid resonant states enable enhanced nonlinear response.

Achieves 100% switching with low power threshold.

Proposes a practical implementation using photonic crystal circuits.

Abstract

We demonstrate that the interaction of loop and nonlinear Fano resonances results in a formation of hybrid resonant states in Mach-Zehnder type interferometers, providing with opportunities for an advanced phase manipulation. The nonlinear response of such structures can be greatly enhanced, leading to a low threshold 100% switching operation. We further propose one of the possible realizations based on nonlinear photonic crystal circuits, suitable for optimal all-optical switching.