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30 June 1999 Coherent phonons in silver nanoparticles embedded in BaO thin films
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Abstract
By using femtosecond time-resolved pump-probe technique we have observed three kinds of coherent phonons (0.30 THz, 1.90 THz, and 3.75 THz) in silver nanoparticles embedded in BaO thin films. The generation of 0.3 THz coherent phonons is attributed to the resonant excitation of localized surface plasmon of silver nanoparticles, and the resonant impulsive stimulated Raman scattering in silver aggregates is responsible for the generation of 1.90 THz and 3.75 THz coherent phonons. But in another area in the same Ag-BaO thin film we only observe 0.3 THz coherent phonons. The space dependence of coherent phonons is attributed to the inhomogeneous distribution of (Ag)n aggregates.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
YingHua Zou, Wei Qian, H. Yan, J. J. Wang, Li Lin, and J. L. Wu "Coherent phonons in silver nanoparticles embedded in BaO thin films", Proc. SPIE 3790, Engineered Nanostructural Films and Materials, (30 June 1999); https://doi.org/10.1117/12.351255
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