Laser-excited acoustic oscillations in silver and bismuth nanowires
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Date
2007
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Coherent acoustic oscillations in Bi and Ag nanowire samples were studied with a femtosecond pump-probe technique and detection of the scattered light. The observed optical and acoustic properties reflect the nanostructure of these materials. The electronic and lattice contributions to the excitation of coherent acoustic phonons are described using a two-temperature model. The excitation is performed at different laser fluences, and the high density of optically induced excitations modifies the state of the lattice. A transient state with softening of the lattice was observed in Ag nanowire samples.
Description
Journals published by the American Physical Society can be found at http://journals.aps.org/
Keywords
ELASTIC CONSTANTS, METAL NANOPARTICLES, LIGHT-SCATTERING, GOLD, DYNAMICS, ELECTRON, EXCITATION, PARTICLES, NANORODS, NANOCRYSTALS, Physics
Citation
Sergey N. Jerebtsov, Alexandre A. Kolomenskii, Haidong Liu, Hong Zhang, Zuxin Ye, Zhiping Luo, Wenhao Wu, Gerhard G. Paulus and Hans A. Schuessler. Phys.Rev.B 76 184301 2007."Copyright (2007) by the American Physical Society."