Anisotropy of the optical properties and inhomogeneity of plastically deformed germanium crystals

Рошак Е.Н., Ширшнев П.С., Пржевуский А.К. Анизотропия оптических свойств и неоднородность пластически деформированных кристаллов германия // Оптический журнал. 2008. Т. 75. № 9. С. 78–82.

Roshak E.N., Shirshnev P.S., Przhevuskiy A.K. Anisotropy of the optical properties and inhomogeneity of plastically deformed germanium crystals [in Russian] // Opticheskii Zhurnal. 2008. V. 75. № 9. P. 78–82.

E. N. Roshak, P. S. Shirshnev, and A. K. Przhevuskiĭ, "Anisotropy of the optical properties and inhomogeneity of plastically deformed germanium crystals," Journal of Optical Technology. 75 (9), 599-602 (2008). https://doi.org/10.1364/JOT.75.000599

Plastic deformation of germanium crystals by compression along the ⟨111⟩ symmetry direction results in birefringence for light propagating in any direction. The crystal in this case breaks up into regions several millimeters across, with varying orientation of the index ellipsoid and the birefringence.