Feshbach blockade: single-photon nonlinear optics using resonantly enhanced cavity-polariton scattering from biexciton states

TL;DR

This paper presents a theoretical model showing how resonant coupling with biexciton states can significantly enhance single-photon nonlinear interactions in semiconductor cavity-polariton systems, enabling non-classical light generation.

Contribution

It introduces an analytical model of polariton-biexciton scattering that predicts large nonlinearities near the Feshbach resonance in solid-state systems.

Findings

Predicted large enhancement of polariton interactions near biexciton Feshbach resonance

Analytical model explicitly includes biexcitonic intermediate states

Application to non-classical light generation from polariton dots

Abstract

We theoretically demonstrate how the resonant coupling between a pair of cavity-polaritons and a biexciton state can lead to a large single-photon Kerr nonlinearity in a semiconductor solid-state system. A fully analytical model of the scattering process between a pair of cavity-polaritons is developed, which explicitly includes the biexcitonic intermediate state. A dramatic enhancement of the polariton-polariton interactions is predicted in the vicinity of the biexciton Feshbach resonance. Application to the generation of non-classical light from polariton dots is discussed.