Complex resonance in Fresnel reflection of radiation pulses |
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Authors: | N N Rosanov |
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Institution: | 1.Vavilov State Optical Institute,St. Petersburg,Russia;2.St. Petersburg State University of Information Technologies, Mechanics, and Optics,St. Petersburg,Russia |
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Abstract: | The Fresnel reflection of radiation pulses with an exponential temporal amplitude profile is analyzed. The conditions for
the relevance of the concept of reflectance at a complex frequency, the imaginary part of which determined the rate of time
variation of the amplitude, are specified. For the radiation pulses under study, we demonstrate a complex resonance, i.e.,
an increase in the magnitude of reflectance for the complex frequency of incident radiation (trailing edge of a pulse) that
approaches the complex frequency of natural oscillations of oscillators in the medium. |
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Keywords: | |
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