Linear and nonlinear optical properties of a natural quantum-well material (C10H21NH3)2PbI4

Abstract(C10H21NH3)2PbI4, a layered perovskite-type material, has been studied with emphasis on its linear and nonlinear optical properties. It has been found that this material is a natural quantum-well system, in which excitons are confined in a thin inorganic layer sandwiched between organic barrier layers. Very clear two-dimensional characters of the lowest exciton, its large binding energy and large third-order optical nonlinearity have been found.