The effects of an intracavity photonic crystal in a multimode optical parametric oscillator are studied, with a special focus on quantum fluctuations. The capability to either stimulate or inhibit the spatial instability, lowering or increasing the parametric threshold, allows to control the intensity fluctuations and correlations. A significative quantum noise reduction and an increase of the range of squeezed quadratures are found above threshold where spatial Einstein-Podolsky-Rosen entanglement and inseparability are found.
@article{arxiv.1011.0844,
title = {Spatial entanglement in optical parametric oscillators with photonic crystals},
author = {Maria M. de Castro and Miguel Angel Garcia March and Damia Gomila and Roberta Zambrini},
journal= {arXiv preprint arXiv:1011.0844},
year = {2010}
}