OPTICAL PROPERTIES OF MULTILAYER HETEROSTRUCTURES BASED OF ZINC CHALCOGENIDES OF STRONG LASER EXCITATION
An experimental study is made of nonlinear properties of multilayer heterostructures based on zinc chalcogenides on excitation by ultrashot laser pulse. A strong ultrawideband modification of optical properties of samples under the single- and double-photon excitation of the ZnSe sublattice has been revealed. The ultrafast relaxation time is about 2-5 ps in both cases. A physical model is suggested which qualitatively explains the effects observed