Abstract
This paper proposes a new method for the high speed temporal modulation of infrared wave beams reflected from thin films of semiconductor plasma containing free carriers. The physical foundations of such a method, based on the non-linear and bi-stable properties of free carriers in these films, show possibilities of the elaboration of high-speed tunable modulators and polarizers. The bi-stable conditions are tunable by means of a magnetic field. The reflection of a continuous wave beam from the film with a tunable reflection coefficient leads to pulse shaping, pulse duration being as small as 10−9 s.
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Shvartsburg, A.B. High speed tunable thermic modulation of far infrared waves. Opt Quant Electron 22, 417–426 (1990). https://doi.org/10.1007/BF02113965
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DOI: https://doi.org/10.1007/BF02113965