Hot photoluminescence in amorphousAs2S3

Abstract

We observe a broad radiative emission spectrum in amorphous ${\mathrm{As}}_2$ ${\mathrm{S}}_3$ which is positioned around the optical gap. Measuring the polarization memory with respect to the excitation radiation enables us to characterize the radiation process. The radiative recombination can be explained by recombination of hot self-trapped excitons.