Computer simulation of spectroscopy of infrared absorption and raman scattering of light in GaSe under the influence of hydrostatic compression

The paper contains the results of computer simulation of infrared absorption spectroscopy and Raman scattering of light in GaSe under hydrostatic compression. The theory of the electron density functional was used as the main approach. The oscillatory properties were calculated using the perturbation theory of the electron density functional. It is shown that Raman scattering values change from pressure and show linear dependence. The shear rates are calculated. The obtained data are in accord with the published experimental results. This enables us to consider this approach as promising for the study of such materials and may lead, in the long term, to expanding the field of applicability of gallium selenide as a non-linear optical element by fine tuning the properties with the help of hydrostatic compression.