Mid-Infrared Single Photon Counting
arXiv:quant-ph/0511254 · doi:10.1364/OL.31.001094
Abstract
We report a procedure to detect mid-infrared single photons at 4.65 um via a two-stage scheme based on Sum Frequency Generation, using a Periodically Poled Lithium Niobate (PPLN) nonlinear crystal and a Silicon Avalanche Photodiode. An experimental investigation shows that, in addition to a high timing resolution, this technique yields a detection sensitivity of 1.24 pW with 63mW of net pump power.
9 pages, 2 figures, submitted to Optics Letters