The Effect of High Density Excitons on the Exciton Bands in CuCl

Abstract

The effect of the strong laser irradiation on the exciton bands of CuCl has been studied. The Z 3 and Z 1,2 exciton bands are found to shift to high energy side linearly with the laser intensity. The fact is explained in terms of Hanamura's theory which describes the increase of the exciton formation energy due to the interaction between excitons. The ratio of the peak shift of the Z 1,2 band to that of the Z 3 band is 0.89. From the ratio and the reduced mass of the Z 3 exciton, the effective masses of the electron and hold are deduced to be 0.44 m 0 and 3.6 m 0 , respectively.