Nonlinear Optical Properties of Cadmium Telluride Semiconductor Nanocrystals for Optical Power-Limiting Application

Nonlinear optical properties of cadmium telluride semiconductor nanocrystals were investigated for optical power self-limiting application. The semiconductor nanocrystals were synthesized through colloidal methods. The nonlinear refraction and the nonlinear gure of merit of CdTe nanocrystals in toluene ( 8 10 5 mol/L) were estimated to be -1 10 13 m 2 /W and 200, respectively. The optical power limiting through CdTe nanoscale materials was mainly by the nonlinear refraction because of the high nonlinear FOM.