On-chip non-reciprocal optical devices based on quantum inspired photonic lattices

TL;DR

This paper introduces a new integrated photonic device design using quantum-inspired lattices with magneto-optic effects, achieving high optical isolation and polarization splitting in a compact form.

Contribution

It presents a novel geometry for on-chip non-reciprocal optical devices based on engineered photonic lattices with magneto-optic nonreciprocity, enabling high isolation and polarization splitting.

Findings

Achieves 75 dB isolation ratio over 8 mm in waveguides.

Demonstrates perfect polarization splitting with optimized nonreciprocity.

Uses quantum-inspired photonic lattices to enhance device performance.

Abstract

We propose a novel geometry for integrated photonic devices that can be used as isolators and polarization splitters based on engineered photonic lattices. Starting from optical waveguide arrays that mimic Fock space representation of a non-interacting two-site Bose Hubbard Hamiltonian, we show that introducing magneto-optic nonreciprocity to these structures leads to a superior optical isolation performance. In the forward propagation direction, an input TM polarized beam experiences a perfect state transfer between the input and output waveguide channels while surface Bloch oscillations block the backward transmission between the same ports. Our analysis indicates a large isolation ratio of 75 dB after a propagation distance of 8 mm inside seven coupled waveguides. Moreover, we demonstrate that, a judicious choice of the nonreciprocity in this same geometry can lead to perfect polarization splitting.