New evidence for a nonclassical behavior of laser multimode light

TL;DR

This paper provides experimental evidence that multimode semiconductor lasers exhibit nonclassical behavior, specifically anticorrelations between modes, challenging traditional semiclassical expectations.

Contribution

It demonstrates the first experimental observation of anticorrelations in multimode laser modes, indicating nonclassical quantum effects.

Findings

Revealed anticorrelations between laser modes

Challenged semiclassical theory predictions

Provided evidence of nonclassical multimode behavior

Abstract

In this work, we present new experimental evidence of a nonclassical behavior of a multimode Fabry-Perot (FP) semiconductor laser by the measurements of intensity correlation functions. Because of the multimode quantum state occurrence, instead of expected correlations between the intensities of the laser modes (a semiclassical theory), their anticorrelations were revealed.