Ultrafast Strong-Field Photoemission from Plasmonic Nanoparticles
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- 作者：P茅ter Dombi ; Anton H枚rl ; P茅ter R谩cz ; Istv谩n M谩rton ; Andreas Tr眉gler ; Joachim R. Krenn ; Ulrich Hohenester
- 刊名：Nano Letters
- 出版年：2013
- 出版时间：February 13, 2013
- 年：2013
- 卷：13
- 期：2
- 页码：674-678
- 全文大小：369K
- 年卷期：v.13,no.2(February 13, 2013)
- ISSN：1530-6992
文摘
We demonstrate the ultrafast generation of electrons from tailored metallic nanoparticles and unravel the role of plasmonic field enhancement in this process by comparing resonant and off-resonant particles, as well as different particle geometries. We find that electrons become strongly accelerated within the evanescent fields of the plasmonic nanoparticles and escape along straight trajectories with orientations governed by the particle geometry. These results establish plasmonic nanoparticles as versatile ultrafast, nanoscopic sources of electrons.