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Quasi-phase-matching engineering for spatial control of entangled two-photon states
Juan P Torres1, Adrian Alexandrescu, Silvia Carrasco
1ICFO-Institut de Ciencies Fotoniques, Department of Signal Theory and Communications, Universitat Politecnica de Catalunya, 08034 Barcelona, Spain. jperez@tsc.upc.es
Optics Letters
|February 20, 2004
Abstract:
We show that transverse engineering of quasi-phase-matched geometries can be used to tailor the spatial mode function that describes the quantum state of photon pairs generated in spontaneous parametric down-conversion. We study several geometries and reveal how properly engineered gratings affect, in particular, the spatial correlations embedded in two-photon entangled states.