Angular uncertainty of momentum correlations in parametric fluorescence

TL;DR

This paper investigates the angular uncertainty in the emission angles of photon pairs generated via parametric fluorescence, analyzing factors like pump divergence, spectrum, and crystal size, supported by experimental and numerical data.

Contribution

It introduces a comprehensive model linking pump and crystal parameters to angular uncertainty in photon emission, validated by experimental data.

Findings

Good agreement between experimental data and numerical model

Identified key factors affecting angular uncertainty

Provided detailed angular and spectral characteristics

Abstract

Uncertainty in the determination of emission angles of signal and idler photons is investigated. The role of divergence of the pump beam, width of the pump spectrum, and size of the crystal is elucidated. Experimental data obtained by an iCCD camera are in a good agreement with a numerical model that provides angular and spectral characteristics of the signal and idler fields.