Counter-polarized single-photon generation from the auxiliary cavity of a weakly nonlinear photonic molecule

TL;DR

This paper presents a scheme for generating counter-polarized single photons using weak nonlinearity in asymmetric double cavities, leveraging quantum interference for robust antibunching of emitted light.

Contribution

It introduces a novel method for counter-polarized single-photon generation utilizing weak Kerr nonlinearity and cavity asymmetry, with robustness against surface scattering.

Findings

Strong antibunching of counter-polarized light predicted

Scheme effective with weak nonlinearity and cavity asymmetry

Robust against surface scattering due to quantum interference

Abstract

We propose a scheme for the resonant generation of counter-polarized single photons in double asymmetric cavities with a small Kerr optical nonlinearity (as that created by a semiconductor quantum well) compared to the mode broadening. Due to the interplay between spatial intercavity tunneling and polarization coupling, by weakly exciting with circularly polarized light one of the cavities, we predict strong antibunching of counter-polarized light emission from the non-pumped auxiliary cavity. This scheme due to quantum interference is robust against surface scattering of pumping light, which can be suppressed both by spatial and polarization filters.