Femtosecond studies of coherent acoustic phonons in gold nanoparticles embedded in TiO2 thin films

Authors
Qian, W Lin, L Deng, YJ Xia, ZJ Zou, YH Wong, GKL
Citation
W. Qian et al., Femtosecond studies of coherent acoustic phonons in gold nanoparticles embedded in TiO2 thin films, J APPL PHYS, 87(1), 2000, pp. 612-614
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
87
Issue
1
Year of publication
2000
Pages
612 - 614
Database
ISI
SICI code
0021-8979(20000101)87:1<612:FSOCAP>2.0.ZU;2-Z
Abstract
0.15 THz coherent acoustic phonons have been observed in gold nanoparticles embedded in TiO2 thin films by virtue of femtosecond time-resolved transmi ssivity measurements at room temperature. The generation of these phonons i s attributed to the resonant excitation of localized surface plasmon in gol d nanoparticles. Their damping time is 55 ps which is acquired by fitting t he oscillatory part of time-resolved transmissivity to single exponentially damped cosine function. (C) 2000 American Institute of Physics. [S0021-897 9(00)03501-5].