Transient Cherenkov radiation from an inhomogeneous string excited by an ultrashort laser pulse at superluminal velocity

被引：19

作者：

Arkhipov, R. M. ^{[1
,2
]}

Babushkin, I. ^{[3
]}

Lebedev, M. K. ^{[2
]}

Tolmachev, Yu. A. ^{[2
]}

Arkhipov, M. V. ^{[2
]}

机构：

[1] Leibniz Inst Forsch Verbund Berlin, Weierstrass Inst Appl Anal & Stochast, D-10117 Berlin, Germany

[2] St Petersburg State Univ, Fac Phys, St Petersburg 198504, Russia

[3] Humboldt Univ, Inst Math, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 04期

关键词：

SUPERCONTINUUM GENERATION; TERAHERTZ EMISSION; SYMMETRY-BREAKING; PHOTONIC-CRYSTAL; RESONANT MEDIUM; CONE EMISSION; THIN-FILM; SOLITONS; LIGHT; PROPAGATION;

D O I：

10.1103/PhysRevA.89.043811

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The optical response of a one-dimensional string made of dipoles with a periodically varying density excited by a spot of light moving along the string at superluminal (subluminal) velocity is studied theoretically. The Cherenkov radiation in such a system is rather unusual, possessing both transient and resonant character. We show that, under certain conditions, in addition to the resonant Cherenkov peak, another Doppler-like frequency appears in the radiation spectrum. Both linear (small-signal) and nonlinear regimes as well as different string topologies are considered.

引用

页数：10

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