Biexciton-mediated superradiant photon blockade

TL;DR

This paper theoretically demonstrates that biexciton nonlinearities in a cavity with many quantum dots can induce photon blockade, enabling control over quantum light transport through collective superradiant modes.

Contribution

It introduces a novel mechanism for photon blockade using biexciton resonance tuning in multi-quantum-dot systems, expanding the understanding of quantum nonlinear optics.

Findings

Suppression of two-photon transmission in multi-quantum-dot cavities.

Nonmonotonous dependence of photon correlations on biexciton binding energy.

Photon blockade achieved via tuning biexciton resonance to control superradiant modes.

Abstract

The photon blockade is a hallmark of quantum light transport through a single two-level system that can accomodate only one photon. Here, we theoretically show that two-photon transmission can be suppressed even for a seemingly classical system with large number of quantum dots in a cavity when the biexciton nonlinearity is taken into account. We reveal the nonmonotonous dependence of the second-order correlation function of the transmitted photons on the biexciton binding energy. The blockade is realized by proper tuning the biexciton resonance that controls the collective superradiant modes.