7 March 2014 Spectral and temporal characteristics of a transient Cherenkov radiation from a periodic resonant medium excited by an ultrashort laser pulse at superluminal velocity
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Abstract
We consider Cherenkov-type radiation from inhomogeneous periodic resonant medium excited by an ultrashort pulses of light. It is shown that if the velocity of the propagating excitation is greater (lower) then the velocity of light in vacuum c, a new Doppler-like frequency appears in the spectrum of the medium response. This frequency depends on the medium density distribution and on the observation angle. Possible applications of the effect are discussed.
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Rostislav Arkhipov, Ihar Babushkin, Mikhail V. Arkhipov, Yurii A. Tolmachev, "Spectral and temporal characteristics of a transient Cherenkov radiation from a periodic resonant medium excited by an ultrashort laser pulse at superluminal velocity", Proc. SPIE 8984, Ultrafast Phenomena and Nanophotonics XVIII, 89840S (7 March 2014); doi: 10.1117/12.2037956; https://doi.org/10.1117/12.2037956
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