The dependence of nonlinear optical absorption and carrier dynamics on the thickness of chromium thiophosphate (CrPS_(4))is investigated.Utilizing the I-scan system,we have observed the typical two-photon absorption (...The dependence of nonlinear optical absorption and carrier dynamics on the thickness of chromium thiophosphate (CrPS_(4))is investigated.Utilizing the I-scan system,we have observed the typical two-photon absorption (TPA) at 780 nm for three different thicknesses.The TPA coefficient,third-order nonlinear optical susceptibility Imχ^((3)),and the figure of merit have been obtained by fitting the I-scan data.Using nondegenerate pump-probe measurements,the photoinduced absorption has been observed,and the carrier relaxation processes are phonon-assisted.This study provides deep insights into the nonlinear optical properties of CrPS_(4),which is of great significance for potential applications in ultrafast optical devices.展开更多
基金supported by the National Natural Science Foundation of China (Nos.82227806,12227901,and 12274280)the Strategic Priority Research Program of Chinese Academy of Sciences (No.XDB43010200)the National Key Research and Development Program of China (No.2022YFA1404603)。
文摘The dependence of nonlinear optical absorption and carrier dynamics on the thickness of chromium thiophosphate (CrPS_(4))is investigated.Utilizing the I-scan system,we have observed the typical two-photon absorption (TPA) at 780 nm for three different thicknesses.The TPA coefficient,third-order nonlinear optical susceptibility Imχ^((3)),and the figure of merit have been obtained by fitting the I-scan data.Using nondegenerate pump-probe measurements,the photoinduced absorption has been observed,and the carrier relaxation processes are phonon-assisted.This study provides deep insights into the nonlinear optical properties of CrPS_(4),which is of great significance for potential applications in ultrafast optical devices.
