Two-photon emission in detuned resonance fluorescence
Abstract
We discuss two-photon correlations from the side peaks that are formed when a two-level system emitter is driven coherently, with a detuning between the driving source and the emitter (quasi-resonance fluorescence). We do so in the context of the theories of frequency-resolved photon correlations and homodyning, showing that their combination leads to a neat picture compatible with perturbative two-photon scattering that was popular in the early days of quantum electrodynamics. This should help to control, enhance and open new regimes of multiphoton emission. We also propose a way to evidence the quantum coherent nature of the process from photoluminescence only, through the observation of a collapse of the symmetry of the lineshape accompanied by a surge of its intensity of emission. We discuss several of our results in the light of recent experimental works.
Cite
@article{arxiv.2210.03733,
title = {Two-photon emission in detuned resonance fluorescence},
author = {Eduardo Zubizarreta Casalengua and Elena del Valle and Fabrice P. Laussy},
journal= {arXiv preprint arXiv:2210.03733},
year = {2023}
}
Comments
17 pages, 4 figures -- added ideal two-photon cascade formula (Eq. 3), additional references, corrected some typos & other minor changes. Submitted to Quantum Sci. Technol