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Proceedings Paper

Ultrafast dynamics of crystalline bismuth studied by femtosecond pulses in visible and near-infrared range
Author(s): A. A. Melnikov; O. V. Misochko; S. V. Chekalin
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Paper Abstract

Ultrafast dynamics of bismuth excited by femtosecond laser pulses was studied varying wavelength of pump and probe pulses from 400 to 2500 nm and from 400 to 900 nm respectively. Three relaxational components with decay rates of 1 ps, 7 ps and ~ 1 ns were found in the photoinduced response. The fastest process is ascribed to the excited electrons at T6+ point of the Brillouin zone, that are responsible for coherent A1g phonon generation and its frequency softening. Intermediate component is due to crystal heating via electron-phonon interaction. Finally, a long-lived nanosecond signal is linked to electrons near the Fermi level at Ls point.

Paper Details

Date Published: 11 January 2011
PDF: 10 pages
Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 79931J (11 January 2011); doi: 10.1117/12.881340
Show Author Affiliations
A. A. Melnikov, Institute of Spectroscopy (Russian Federation)
Moscow Institute of Physics and Technology (Russian Federation)
O. V. Misochko, Institute of Solid State Physics (Russian Federation)
S. V. Chekalin, Institute of Spectroscopy (Russian Federation)

Published in SPIE Proceedings Vol. 7993:
ICONO 2010: International Conference on Coherent and Nonlinear Optics
Claude Fabre; Victor Zadkov; Konstantin Drabovich, Editor(s)

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