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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    Title :

    First terahertz-range experiments on pump – probe setup at Novosibirsk free electron laser



    Conference:

    2016 ; Novosibirsk, Russia


    Published in:

    Physics Procedia ; 84 ; 152-156


    Publication date :

    2016



    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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