Observation of non-classical light in semiconductor microcavities

TL;DR

This paper reports the observation of non-classical light generated in semiconductor microcavities, highlighting the role of non-resonant exciton states in producing quantum light, which broadens understanding of light-matter interactions in these structures.

Contribution

It demonstrates that non-resonant exciton states in semiconductor microcavities can produce non-classical light, a novel insight into exciton-photon interactions beyond resonance conditions.

Findings

Non-classical light observed in semiconductor microcavities.

Non-resonant exciton states contribute to quantum light generation.

Enhanced understanding of exciton-photon interactions in microcavities.

Abstract

Semiconductor microcavities are widely used to study collective interactions of cavity exciton-polaritons leading to their condensation phenomenon. Exciton-light interaction is highly enhanced in such structures due to the resonance enhancement of the electromagnetic field inside the high quality cavity. Considerably lower interest is concerned to exciton states non-resonant with the cavity mode for which the exciton-photon interaction is strongly reduced due to the existence of the cavity. We point out here that these states are responsible for non-classical light generation in semiconductor microcavities.