Research Article
Mid-infrared Spectrally Pure Single-Photon States Generation from 22 Nonlinear Optical Crystals
Figure 1
The phase-matching function and group-velocity matching functions () for different signal/idler wavelength and phase-matching angle (polar angle) for AGSe crystal (a) and phase-matching (azimuth angle) angle for LISe crystal in the xy plane (b). In this calculation, we consider the type-II phase-matching condition with collinear and wavelength-degenerate (2 = = ) configuration.
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