Linear and nonlinear optical properties of ternary AIIBIVC2Vchalcopyrite semiconductors

The refractive indices of ZnSiAs
2
, CdGeP
2
, and CdGeAs
2
have been determined over a wide range of wavelengths and the optical nonlinear coefficient for second-harmonic generation from the 10.6-μ CO
2
laser have been measured. The absorption coefficient versus wavelength is given for the above materials as well as for ZnGeP
2
, a previously discussed material. Three-frequency phase-matched mixing is described for each material.