The effect of plastic strain on interband and intraband optical transitions in germanium crystals

Рошак Е.Н., Ширшнев П.С., Пржевуский А.К. Влияние пластической деформации на межзонные и внутризонные оптические переходы в кристаллах германия // Оптический журнал. 2007. Т. 74. № 11. С. 7–11.

Roshak E.N., Shieshnev P.S., Przhevuskiy A.K. The effect of plastic strain on interband and intraband optical transitions in germanium crystals [in Russian] // Opticheskii Zhurnal. 2007. V. 74. № 11. P. 7–11.

E. N. Roshak, P. S. Shirshnev, and A. K. Przhevuskiĭ, "The effect of plastic strain on interband and intraband optical transitions in germanium crystals," Journal of Optical Technology. 74 (11), 726-729 (2007). https://doi.org/10.1364/JOT.74.000726

This paper shows that the absorption spectrum in the 1.6-15-μm region in germanium crystals, which results from plastic strain, is mainly determined by two parameters: the initial carrier concentration and the degree of plastic strain. The free-carrier absorption is unambiguously associated with the electric parameters only when the strain is not too great (<6%).