Ultrafast dynamics of crystalline bismuth studied by femtosecond pulses in visible and near-infrared range

A. A. Melnikov; O. V. Misochko; S. V. Chekalin

doi:10.1117/12.881340

11 January 2011 Ultrafast dynamics of crystalline bismuth studied by femtosecond pulses in visible and near-infrared range

A. A. Melnikov, O. V. Misochko, S. V. Chekalin

Author Affiliations +

Proceedings Volume 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics; 79931J (2011) https://doi.org/10.1117/12.881340
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

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 A_1g 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 L_s point.

Citation Download Citation

A. A. Melnikov, O. V. Misochko, and S. V. Chekalin "Ultrafast dynamics of crystalline bismuth studied by femtosecond pulses in visible and near-infrared range", Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 79931J (11 January 2011); https://doi.org/10.1117/12.881340

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