Observation of coherent phonons in silver nanoparticles embedded in BaO thin fil

2019-10-25 18:37:07

silver nanoparticles BaO coherent phonons

责任者: Qian, W.;Yan, H.;Wang, J.J.;Zou, Y.H.;Lin, L.;Wu, J.L. 单位: Dept. of Phys., Peking Univ., Beijing, China 来源出处: Applied Physics Letters(Appl. Phys. Lett. (USA)),1999/03/29,74(13):1806-8 摘要: Three kinds of coherent phonons (0.30, 1.90, and 3.75 THz) have been observed in silver nanoparticles embedded in BaO thin films by means of the femtosecond time-resolved pump-probe technique. 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 and 3.75 THz coherent phonons 关键词: barium compounds;metal clusters;nanostructured materials;phonon spectra;Raman spectra;silver;thin films;time resolved spectra;coherent phonons;silver nanoparticles;BaO thin films;femtosecond time-resolved pump-probe technique;resonant excitation;localized surface plasmon;resonant impulsive stimulated Raman scattering;silver aggregates;0.3 to 3.75 THz;BaO:Ag