Generation of non-classical optical fields by a beam splitter with second-order nonlinearity

TL;DR

This paper introduces a quantum model of a nonlinear beam splitter with second-order nonlinearity, demonstrating its ability to generate non-classical optical fields exhibiting squeezing and sub-Poissonian photon statistics.

Contribution

It presents a novel quantum-mechanical model of a nonlinear beam splitter that can produce non-classical light in both fundamental and second harmonic modes.

Findings

Generation of squeezing in output modes

Observation of sub-Poissonian photon statistics

Potential for new quantum light sources

Abstract

We propose quantum-mechanical model of a beam splitter with second-order nonlinearity and show that non-classical features such as squeezing and sub-Poissonian photon statistics of optical fields can be generated in output fundamental and second harmonic modes when we mix coherent light beams via such a nonlinear beam splitter.