摘要 : The results of the quantitative investigations of the renormalization of the energy spectrum of the Wannier-Mott exciton by the isotope effect are presented. For this purpose accurate measurements of the mirror reflection and intr... 展开 The results of the quantitative investigations of the renormalization of the energy spectrum of the Wannier-Mott exciton by the isotope effect are presented. For this purpose accurate measurements of the mirror reflection and intrinsic luminescence spectra of LiHxD1-x mixed crystals with a clean surface were carried out at a low temperature. The results of the experiment showed that the isotope substitution of the light isotope by the hard one increased the exciton binding energy E(b) as well as the energy of the polariton longitudinal-transversal splitting. Nonlinear dependence E(b) similar to f(x) is due primarily to the fluctuation broadening of the valence and conduction bands and is described by the second degree of the polynom. This broadening is connected with the isotope disorder of the crystal lattice. The reasons for nonlinear dependence of Delta(LT)similar to f(x) are briefly discussed. This emphasizes that the control of the isotope constitution of the crystal lattice makes it possible to create systems with variable effectiveness of exciton(polariton)-phonon interaction. It is shown that the quantitative investigation of such systems permits the experimental reconstruction of the Coulomb and Frochlich value couplings. [References: 70] 收起