Title
Orbital angular momentum correlations with a phase-flipped Gaussian mode pump beam
Date Issued
01 January 2012
Access level
metadata only access
Resource Type
journal article
Author(s)
Colgate University
Publisher(s)
IOP Publishing Ltd
Abstract
We report orbital angular momentum (OAM) and angle correlations between signal and idler photons observed when the nonlinear crystal used in spontaneous parametric down-conversion is illuminated by a non-fundamental Gaussian pump beam. We introduce a π-phase step to the transverse profile of the pump, before it impinges on the crystal to create a phase-flipped Gaussian mode, which is a close approximation to an HG10 Hermite-Gaussian-like beam. The correlations in OAM and angular position are then measured holographically using two separate spatial light modulators in the signal and idler arms. We show the transfer of the OAM spectrum of the pump to the down-converted fields, manifested as a redistribution in the OAM correlations consistent with OAM conservation. This corresponds to a modulation of the angular position correlations consistent with the Fourier relationship between the OAM and angle. © 2012 IOP Publishing Ltd.
Volume
14
Issue
8
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Subjects
Scopus EID
2-s2.0-84864928346
Source
Journal of Optics (United Kingdom)
ISSN of the container
2040-8978
Sponsor(s)
Seventh Framework Programme 221906 FP7
Sources of information:
Directorio de Producción Científica
Scopus