Pressure Effects of Optical Spectra of Impurity Centers in Solids

Abstract

Pressure dependences of absorption and emission spectra of impurities in solids are calculated with a one dimensional configuration-coordinate model considering pressure-dependent linear coupling coefficient and force constants which arise through anharmonic terms of the adiabatic potential energies. It is shown that the pressure-dependent force constants play an important role in the understanding of the pressure effects on the peak positions, band-widths and Huang-Rhys parameters.