Transient Cherenkov radiation from an inhomogeneous string excited by an ultrashort laser pulse at superluminal velocity
- Arkhipov, Rostislav M.
- Babushkin, Ihar
- Lebedev, Mikhail K.
- Tolmachev, Yurii A.
- Arkhipov, Mikhail V.
2010 Mathematics Subject Classification
- 78A60 78A10 78A40 78A45
2008 Physics and Astronomy Classification Scheme
- 41.60.Bq 42.25.Fx 42.25.Hz 42.65.Ky
- Cherenkov radiation, superluminal pulse propagation, ultrashort laser pulse, difraction of ultrashort laser pulses
An optical response of one-dimensional string made of dipoles with a periodically varying density excited by a spot of light moving along the string at the superluminal (subluminal) velocity is studied. We consider in details the spectral and temporal dynamics of the Cherenkov radiation, which occurs in such system in the transient regime. We point out the resonance character of radiation and the appearance of a new Doppler-like frequency in the spectrum of the transient Cherenkov radiation. Possible applications of the effect as well as different string topologies are discussed
- Phys. Rev. A, 89 (2014) pp. 043811/1--043811/10.