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Proceedings Paper

Ab-initio study of coherent phonons excited by femtosecond laser pulses in Bismuth
Author(s): Eeuwe S. Zijlstra; Larisa L. Tatarinova; Martin E Garcia
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Paper Abstract

Using the Born-Oppenheimer approximation we calculate potential energy surfaces of photoexcited Bismuth-bulk. We determine phonon frequencies and potential anharmonicities for the case of high density of excited carriers. In particular, we focus on the phonon modes A1g and Eg. We find strong softening of the A1g-frequency for increasing excited carrier density. Furthermore, from the analysis of the lattice motion upon excitation we show that there is a coupling between the A1g and Eg modes, which is consistent with recent experimental findings.

Paper Details

Date Published: 7 June 2006
PDF: 6 pages
Proc. SPIE 6261, High-Power Laser Ablation VI, 62610R (7 June 2006); doi: 10.1117/12.674387
Show Author Affiliations
Eeuwe S. Zijlstra, Univ. Kassel (Germany)
Larisa L. Tatarinova, Univ. Kassel (Germany)
Martin E Garcia, Univ. Kassel (Germany)

Published in SPIE Proceedings Vol. 6261:
High-Power Laser Ablation VI
Claude R. Phipps, Editor(s)

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