Relative-Phase And Time-Delay Maps All Over The Emission Cone Of Hyperentangled Photon Source

Keywords

hyperentanglement; phase compensation; two-crystal; walkoff compensation

Abstract

Realizing high flux of hyperentangled photons requires collecting photon pairs simultaneously entangled in multiple degrees of freedom over relatively wide spectral and angular emission ranges. We consider the hyperentangled photons produced by superimposing noncollinear spontaneous parametric down conversion (SPDC) emissions of two crossed and coherently pumped nonlinear crystals. We present an approach for determining the directional-spectral relative-phase and time-delay maps of hyperentangled photons all over the SPDC emission cone. A vectorial representation is adopted for all parameters of concern. This enables us to examine unconventional arrangements such as the autocompensation of relative-phase and time-delay via oblique pump incidence. While prior works often adopt first-order approximation, it is shown that the actual directional relative-phase map is very well approximated by a quadratic function of the polar angle of the two-photon emission while negligibly varying with the azimuthal angle.

Publication Date

2-1-2017

Publication Title

Optical Engineering

Volume

56

Issue

2

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/1.OE.56.2.026114

Socpus ID

85013427514 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85013427514

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