Large suppression of quantum fluctuations of light from a single emitter by an optical nanostructure

TL;DR

This paper demonstrates that coupling a single emitter to an optical nanostructure can greatly suppress quantum fluctuations of emitted light, enabling the creation of highly controllable squeezed states with potential nanoscale applications.

Contribution

It introduces a hybrid system that significantly relaxes conditions for squeezing light and offers new control methods for quantum light at the nanoscale.

Findings

Quantum fluctuations below shot noise achieved

Squeezing conditions relaxed compared to free space

Control over squeezed light in near and far fields

Abstract

We investigate the reduction of the electromagnetic field fluctuations in resonance fluorescence from a single emitter coupled to an optical nanostructure. We find that such hybrid system can lead to the creation of squeezed states of light, with quantum fluctuations significantly below the shot noise level. Moreover, the physical conditions for achieving squeezing are strongly relaxed with respect to an emitter in free space. A high degree of control over squeezed light is feasible both in the far and near fields, opening the pathway to its manipulation and applications on the nanoscale with state-of-the-art setups.