Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5497265 | Physics Procedia | 2016 | 5 Pages |
Abstract
A single-color pump-probe system has been commissioned at the Novosibirsk free electron laser. The laser emits a tunable monochromatic terahertz radiation. To prove the proper system operation, we investigated the time-resolved absorption of a sample of n-type germanium doped with antimony, which was previously investigated at the FELBE facility, in the temperature range from 5 to 40 K. The measured relaxation time amounted to about 1.7 ns, which agreed with the results obtained at the FELBE. The results of pump-probe measurements of non-equilibrium dynamics of hot electrons in the germanium crystal at cryogenic temperatures are presented for wavelengths of 105, 141 and 150 μm.
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Authors
Yulia Yu. Choporova, Vasily V. Gerasimov, Boris A. Knyazev, Sergey M. Sergeev, Oleg A. Shevchenko, Roman Kh. Zhukavin, Nikolay V. Abrosimov, Konstantin A. Kovalevsky, Vladimir K. Ovchar, Heinz-Wilhelm Hübers, Gennady N. Kulipanov, Valery N. Shastin,