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

抄録

The effect of the strong laser irradiation on the exciton bands of CuCl has been studied. The Z₃ 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 Z₃ band is 0.89. From the ratio and the reduced mass of the Z₃ exciton, the effective masses of the electron and hold are deduced to be 0.44m₀ and 3.6m₀, respectively.