Mechanism of linear and nonlinear optical effects of chalcopyrites LiGaX_2 (X=S, Se, and Te) crystals

摘要

The electronic band structures are calculated for the recently discovered infrared nonlinear optical crystals LiGaX_2 (X=S, Se, Te) by using the ab initio plane-wave pseudopotential method. Based on the band structures, the linear and nonlinear optical co