Size‐Quantized Excitons in Microcrystals of Cuprous Halides Embedded in Alkali‐Halide Matrices

Abstract

Abstract Exciton luminescence spectra in CuCl, CuBr, and CuI microcrystals of a few nm in size which are embedded in alkali‐halide matrices are studied under selective excitation at the exciton absorption bands inhomogeneously broadened by the size distribution. The size‐quantized exciton states are found to split into various components. From the analysis of the splitting on the basis of the size‐quantization of the exciton translational motion in the microcrystals of thin platelets, the Z 3 exciton translational mass, the Luttinger parameters, and k ‐linear terms for the Z 1,2 excitons are derived in these compounds.