Surface plasmon dynamics in silver nanoparticles studied by femtosecond time-resolved photoemission
Surface plasmon dynamics in silver nanoparticles studied by femtosecond time-resolved photoemission
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DOI：
10.1103/physrevlett.85.2921
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发表时间：
2000-10-02
影响因子：
8.6
通讯作者：
Gerber, G
中科院分区：
文献类型：
--
作者：
Lehmann, J;Merschdorf, M;Gerber, G
多光子光电子能谱揭示了石墨表面银纳米粒子表面等离子体的多重激发。用400 nm飞秒辐射的表面等离子体激元的共振激发允许人们区分来自纳米颗粒和衬底的光电发射。两个不同的以前未观察到的集体激发衰变通道已被确定，即，衰减到一个或几个单粒子激发。
Multiphoton photoelectron spectroscopy reveals the multiple excitation of the surface plasmon in silver nanoparticles on graphite. Resonant excitation of the surface plasmon with 400 nm femtosecond radiation allows one to distinguish between photoemission from the nanoparticles and the substrate. Two different previously unobserved decay channels of the collective excitation have been identified, namely, decay into one or several single-particle excitations.