Observation of intensity squeezing in resonance fluorescence from a solid-state device
Abstract
Intensity squeezing, i.e., photon number fluctuations below the shot noise limit, is a fundamental aspect of quantum optics and has wide applications in quantum metrology. It was predicted in 1979 that the intensity squeezing could be observed in resonance fluorescence from a two-level quantum system. Yet, its experimental observation in solid states was hindered by inefficiencies in generating, collecting and detecting resonance fluorescence. Here, we report the intensity squeezing in a single-mode fibre-coupled resonance fluorescence single-photon source based on a quantum dot-micropillar system. We detect pulsed single-photon streams with 22.6% system efficiency, which show subshot-noise intensity fluctuation with an intensity squeezing of 0.59 dB. We estimate a corrected squeezing of 3.29 dB at the first lens. The observed intensity squeezing provides the last piece of the fundamental picture of resonance fluorescence; which can be used as a new standard for optical radiation and in scalable quantum metrology with indistinguishable single photons.
Cite
@article{arxiv.2009.06164,
title = {Observation of intensity squeezing in resonance fluorescence from a solid-state device},
author = {Hui Wang and Jian Qin and Si Chen and Ming-Cheng Chen and Xiang You and Xing Ding and Y. -H. Huo and Ying Yu and C. Schneider and Sven Hoefling and Marlan Scully and Chao-Yang Lu and Jian-Wei Pan},
journal= {arXiv preprint arXiv:2009.06164},
year = {2020}
}
Comments
10 pages, 2 figures