Intensity correlations in quantum cascade laser harmonic frequency combs
Abstract
A novel study on harmonic frequency combs emitted by Quantum Cascade Lasers (QCLs) is here presented, demonstrating the presence of intensity correlations between twin modes characterising the emission spectra. These originate from a Four-Wave Mixing (FWM) process driven by the active medium's third-order non-linearity. The study of such correlations is essential for the engineering of a new generation of semiconductor devices with the potential of becoming integrated emitters of light with quantum properties, such as squeezing and entanglement. Starting from experimental results, the limits of state-of-the-art technology are discussed as well as the possible methodologies that could lead to the detection of non-classical phenomena, or alternatively improve the design of QCLs, in the compelling perspective of generating quantum correlations in mid-infrared light.
Cite
@article{arxiv.2206.07624,
title = {Intensity correlations in quantum cascade laser harmonic frequency combs},
author = {Tecla Gabbrielli and Natalia Bruno and Nicola Corrias and Simone Borri and Luigi Consolino and Mathieu Bertrand and Mehran Shahmohammadi and Martin Franckie and Mattias Beck and Jerome Faist and Alessandro Zavatta and Francesco Cappelli and Paolo De Natale},
journal= {arXiv preprint arXiv:2206.07624},
year = {2022}
}
Comments
14 pages, 6 figures