All-optical diode action with Thue-Morse quasiperiodic photonic crystals

TL;DR

This paper proposes a theoretical method to create an all-optical diode using quasiperiodic Thue-Morse photonic crystals, leveraging spatial asymmetry and Kerr nonlinearity to achieve high-contrast, nonreciprocal light propagation.

Contribution

It introduces a novel approach combining quasiperiodic photonic structures and nonlinearity to realize efficient optical diodes.

Findings

Achieves near-unity contrast in nonreciprocal transmission.

Demonstrates polarization-insensitive diode action.

Utilizes sharp resonances from quasiperiodic structures.

Abstract

We theoretically investigate the possibility of realizing a nonlinear all-optical diode by using the unique features of quasiperiodic 1D photonic crystals. The interplay between the intrinsic spatial asymmetry in odd-order Thue-Morse lattices and Kerr nonlinearity, combined with the unconventional field localization properties of this class of quasiperiodic sequences, gives rise to sharp resonances that can be used to give a polarization-insensitive, nonreciprocal propagation with a contrast close to unity for low optical intensities.