Coherent phonon-polaritons and subluminal Cherenkov radiation

被引：6

作者：

Wahlstrand, JK

Stevens, TE

Kuhl, J

Merlin, R

机构：

[1] Univ Michigan, Dept Phys, Harrison M Randall Lab Phys, Ann Arbor, MI 48109 USA

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICA B-CONDENSED MATTER | 2002年 / 316卷

关键词：

coherent phonon-polaritons; Cherenkov radiation; ZnTe; ZnSe;

D O I：

10.1016/S0921-4526(02)00425-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We use an optical method based on sub-picosecond pulses moving in a nonlinear medium to generate relativistic dipoles that emit Cherenkov phonon-polariton radiation. Experiments on ZnTe and ZnSe reveal emission at subluminal speeds involving frequencies below those of the corresponding infrared-active phonon. The generation of Cherenkov radiation and impulsive stimulated Raman scattering by polaritons are the same physical phenomenon. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：55 / 61

页数：7

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