Compact 2D Nonlinear Photonic Crystal Source of Beamlike Path Entangled Photons
arXiv:1301.3379 · doi:10.1364/OE.21.006689
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.
11 pages, 4 figures
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- Compact engineering of path-entangled sources from a monolithic quadratic nonlinear photonic crystal
- Golden Ratio entanglement in hexagonally poled nonlinear crystals
- Efficient parametric generation in a nonlinear photonic crystal pumped by a dual beam
- Hot-spots and gain enhancement in a doubly pumped parametric down-conversion process