title: Compact 2D nonlinear photonic crystal source of beamlike path entangled photons.
abstract: We demonstrate a method to generate entangled photons with controlled spatial shape by parametric down conversion (PDC) in a 2D nonlinear crystal. A compact and novel crystal source was designed and fabricated, generating directly path entangled photons without the use of additional beam-splitters. This crystal supports two PDC processes, emitting biphotons into two beamlike modes simultaneously. Two coherent path entangled amplitudes of biphotons were created and their interference observed. Our method enables the generation of entangled photons with controlled spatial, spectral and polarization properties.
authors.affiliation: Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel. hagaie@huji.ac.il
authors.forename: E
authors.initials: E
authors.lastname: Megidish
authors.forename: A
authors.initials: A
authors.lastname: Halevy
authors.forename: H S
authors.initials: HS
authors.lastname: Eisenberg
authors.forename: A
authors.initials: A
authors.lastname: Ganany-Padowicz
authors.forename: N
authors.initials: N
authors.lastname: Habshoosh
authors.forename: A
authors.initials: A
authors.lastname: Arie
mesh_terms: D003460:Crystallization; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D008029:Lighting / Q000295:instrumentation*; D017711:Nonlinear Dynamics; D012031:Refractometry / Q000295:instrumentation*