Hot-spots and gain enhancement in a doubly pumped parametric down-conversion process
Abstract
We experimentally investigate the parametric down-conversion process in a nonlinear bulk crystal, driven by two non-collinear pump modes. The experiment shows the emergence of bright hot-spots in modes shared by the two pumps, in analogy with the phenomenology recently observed in 2D nonlinear photonic crystals. By exploiting the spatial walk-off between the two extraordinary pump modes we have been able to recreate a peculiar resonance condition, reported by a local enhancement of the parametric gain, which corresponds to a transition from a three-mode to a four-mode coupling. From a quantum point of view this opens the way to the generation of multimode entangled states of light such as tripartite or quadripartite states, in simple bulk nonlinear sources.
Cite
@article{arxiv.2007.12429,
title = {Hot-spots and gain enhancement in a doubly pumped parametric down-conversion process},
author = {Ottavia Jedrkiewicz and Erica Invernizzi and Enrico Brambilla and Alessandra Gatti},
journal= {arXiv preprint arXiv:2007.12429},
year = {2020}
}
Comments
15 pages, 10 figures