Observation of ultra-broadband, beamlike parametric downconversion

Details Observation of ultra-broadband, beamlike parametric downconversion Observation of ultra-broadband, beamlike parametric downconversion

2007-01-16

arxiv.org/abs/quant-ph/0701105v1

Physics

Quantum Physics

Optics Letters, accepted, 4 pages and 2 figures

Scientific paper

10.1364/OL.32.000817

We report spontaneous parametric downconversion having an unusually wide spectral bandwidth. A collinear type-1 phase-matching configuration is employed with degeneracy near the zero group velocity dispersion frequency. With a spectral width of 1080 nm and degenerate wavelength 1885 nm, the source also emits a high flux of photon pairs constrained to a cone of only 2 degree half-angle. A rigorous theoretical approach is developed that confirms the experimental observations. The source properties are consistent with an ultra-short photon-pair correlation time and, for a narrowband pump, extremely high-dimensional spectral entanglement.

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