Research Article
Mid-infrared Spectrally Pure Single-Photon States Generation from 22 Nonlinear Optical Crystals
Table 1
Main properties of the 10 uniaxial birefringent crystals (part I), 4 biaxial birefringent crystals (part II), and 8 periodic poling crystals (part III) discussed in this work, including the chemical formula, the axis (uniaxial, biaxial, or isotropic), the point group, the transparency range , and the maximal nonlinear coefficient at different wavelengths (in m in the bracket). Most of the data were obtained from references [34, 35]. The crystal has different types of point group at different temperatures. = . The calculated result is from [22] according to the method from [36].
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