# Nonclassical Light Generation from III-V and Group-IV Solid-State Cavity Quantum Systems

## TL;DR

This paper reviews and models the generation of nonclassical light using semiconductor cavity QED systems, focusing on photon blockade effects in III-V and group-IV platforms, and proposes new experimental directions.

## Contribution

It provides a comprehensive model for photon blockade in III-V quantum dot systems and suggests novel experiments with group-IV color-center emitters.

## Key findings

- Photon blockade enables high-purity indistinguishable photon streams.
- Multi-emitter cavity QED offers richer dressed-state structures.
- Proposed experimental directions for nonclassical light generation.

## Abstract

In this chapter, we present the state-of-the-art in the generation of nonclassical states of light using semiconductor cavity quantum electrodynamics (QED) platforms. Our focus is on the photon blockade effects that enable the generation of indistinguishable photon streams with high purity and efficiency. Starting with the leading platform of InGaAs quantum dots in optical nanocavities, we review the physics of a single quantum emitter strongly coupled to a cavity. Furthermore, we propose a complete model for photon blockade and tunneling in III-V quantum dot cavity QED systems. Turning toward quantum emitters with small inhomogeneous broadening, we propose a direction for novel experiments for nonclassical light generation based on group-IV color-center systems. We present a model of a multi-emitter cavity QED platform, which features richer dressed-states ladder structures, and show how it can offer opportunities for studying new regimes of high-quality photon blockade.