Document Type

Article

Publication Date

2011

DOI

10.1063/1.3574888

Publication Title

AIP Advances

Volume

1

Issue

1

Pages

1-5

Abstract

The generation of coherent phonons in polycrystalline bismuth film excited with femtosecond laser pulse is observed by ultrafast time-resolved electron diffraction. The dynamics of the diffracted intensities from the (110), (202), and (024) lattice planes show pronounced oscillations at 130-150 GHz. The origin of these coherent acoustic phonons is discussed in view of optical phonon decay into two acoustic phonons. Different drop times in the intensity of the diffraction orders are observed and interpreted as anisotropy in the energy transfer rate of coherent optical phonons.

Comments

This article is distributed under a Creative Commons Attribution 3.0 Unported License.

Original Publication Citation

Bugayev, A., Esmail, A., Abdel-Fattah, M., & Elsayed-Ali, H. E. (2011). Coherent phonons in bismuth film observed by ultrafast electron diffraction. AIP Advances, 1(1), 1-5. doi: 10.1063/1.3574888

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