Coherent phonon–polaritons and subluminal Cherenkov radiation

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-acti...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 316; pp. 55 - 61
Main Authors Wahlstrand, J.K., Stevens, T.E., Kuhl, J., Merlin, R.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2002
Subjects
Cherenkov radiation
Coherent phonon–polaritons
ZnSe
ZnTe
78.47.+p
Cherenkov radiation
Coherent phonon–polaritons
71.36.+c
42.65.Dr
ZnSe
ZnTe
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Summary: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.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(02)00425-8