Highly efficient generation of single-mode photon pairs using a crystalline whispering gallery mode resonator
arXiv:1404.0593 · doi:10.1103/PhysRevA.91.023812
Abstract
We report a highly efficient source of narrow-band photon pairs based on parametric down-conversion in a crystalline whispering gallery mode resonator. Remarkably, each photon of a pair is strictly emitted into a single spatial and temporal mode, as witnessed by Glaubers autocorrelation function. We explore the phase-matching conditions in spherical geometries, and determine the requirements of the single-mode operation. Understanding these conditions has allowed us to experimentally demonstrate a single-mode pair-detection rate of pairs/s per mW pump power per 20 MHz bandwidth without the need of additional filter cavities.
arXiv comment7 pages, 6 figures
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