Properties of entangled photon pairs generated in periodically poled nonlinear crystals
Jiri Svozilik, Jan Perina Jr
TL;DR
This paper presents a detailed quantum model analyzing the properties of entangled photon pairs generated in chirped periodically-poled nonlinear crystals, focusing on spectral, temporal, and spatial characteristics and their controllability.
Contribution
It introduces a comprehensive quantum model that predicts and explains the spectral, temporal, and spatial properties of entangled photon pairs, including entanglement control via chirping.
Findings
Spectral bandwidths and entanglement areas can be effectively controlled by chirping.
Splitting of entanglement area in the transverse plane is accompanied by spectral splitting.
Temperature dependencies of intensity profiles are explained using the model.
Abstract
Using a rigorous quantum model a comprehensive study of physical properties of entangled photon pairs generated in spontaneous parametric down-conversion in chirped periodically-poled crystals is presented. Spectral, temporal, as well as spatial characteristics of photon pairs are analyzed. Spectral bandwidths, photon-pair flux, and entanglement area can be effectively controlled by chirping. Quantification of entanglement between photons in a pair is given. Splitting of entanglement area in the transverse plane accompanied by spectral splitting has been revealed. Using the model temperature dependencies of the experimental intensity profiles reported in literature have been explained.
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