The Influence of Impurity and Isotopic Composition of Single-Crystal Germanium on Optical Transmission in the Range of 520-1000 cm(-1)

摘要

The optical properties of pure and doped germanium single crystals of natural isotopic composition and isotopically pure Ge-70 and Ge-74 single crystals have been investigated. The influence of dopants and the presence of residual oxygen in germanium on the position and shape of phonon absorption peaks and on the attenuation coefficients for these peaks in the spectral range of 520-1000 cm(-1) is experimentally revealed. The decrease in the frequency of peaks in phonon absorption bands with an increase in the mass number of germanium isotopes is analyzed.