Two- and Three-Photon Absorption Induced Emission, Optical Limiting and Stabilization of CdTe/CdS/ZnS Quantum Tripods System

Two- and three-photon absorption and excitation properties of CdTe/CdS/ZnS quantum tripods in chloroform have been investigated by using ~160-fs laser pulses in the spectral range of ~(1150-1650) nm. The two- and three-photon excited up-conversion emission is located around 740-nm position; the emission intensity follows the square law and cubic law on the excitation intensity for the former and the latter, respectively. The nonlinear transmission and output/input characteristics have been measured at a two-photon absorption wavelength of 1175 nm and a three-photon absorption wavelength of 1580 nm separately. Fairly good optical power limiting and stabilization performance of this material have been achieved.