Thermal stability of the properties of germanium crystals for IR optics

A F Shimanskii, A N Gorodishcheva, S A Kopytkova, T V Kulakovskaya
2019 Journal of Physics, Conference Series  
Both Sb-doped Germanium and Ge-Si solid solution single crystals with resistivity from 1.5 to 7 Ω·cm were grown using the Czochralski method. The optical transmission of single crystals and the stability of their optical properties were studied by infrared Fourier spectroscopy at a wavelength of 10.6 μm and temperature range from 25 to 60 °C. It was found that decreasing the background impurities concentration leads to the reduction of the infrared absorption at room temperature while not
more » ... ure while not affecting the thermal stability of the optical properties. Thermal stability of the optical properties of Sb-doped germanium single crystals increases by adding from 0.2 to 0.8 at % of silicon.
doi:10.1088/1742-6596/1353/1/012062 fatcat:wfgoqjtnzbhkddtjueryimlhvi