Two Photon Induced Photoconductivity In Hg1-Xcdxte

The Beijing free electron laser(BFEL) has been used for the first time to study the nonlinear photoconductivity characteristics of the infrared photoelectronic material Hg1-xCdxTe. Taking advantage of the high photon flux density of BFEL, we have investigated the photoconductivity characteristics of Hg1-xCdxTe induced by two photon absorption observed the photoconductivity signals saturation, and studied the two photon photoconductivity characteristics on different bias across the sample.