On diagnostics of media using extremely short terahertz radiation pulses |
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| Authors: | N. N. Rosanov M. V. Arkhipov R. M. Arkhipov A. V. Pakhomov I. V. Babushkin |
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| Affiliation: | 1.Vavilov State Optical Institute,St. Petersburg,Russia;2.ITMO University,St. Petersburg,Russia;3.Ioffe Physical Technical Institute,Russian Academy of Sciences,St. Petersburg,Russia;4.St. Petersburg State University,St. Petersburg,Russia;5.Max Planck Institute for the Science of Light,Erlangen,Germany;6.Samara National Research University,Samara,Russia;7.P.N. Lebedev Physical Institute, Samara Branch,Russian Academy of Sciences,Samara,Russia;8.Institute of Quantum Optics,Leibniz University Hannover,Hannover,Germany;9.Max Born Institute,Berlin,Germany |
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| Abstract: | The possibility of diagnosing the linear and nonlinear electrodynamic susceptibilities of media by examining the time profiles of extremely short terahertz radiation pulses (using pulsed terahertz spectroscopy methods) that are incident on a thin layer of a medium under study, are reflected from the layer, and are transmitted through it is shown theoretically. In the general case, the linear and nonlinear susceptibilities of different orders can be found by solving linear integral equations. Diagnostics is considerably simplified in the case of an isolated resonance of a medium with homogeneous spectral broadening, which is modeled by the response of an anharmonic oscillator. |
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