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Coherent phonon-polaritons and subluminal Cherenkov radiation

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Kuhl,  J.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Wahlstrand, J. K., Stevens, T. E., Kuhl, J., & Merlin, R. (2002). Coherent phonon-polaritons and subluminal Cherenkov radiation. Physica B, 316, 55-61.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EEF9-E
Abstract
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.