Electron acceleration by surface plasma waves in double metal surface structure

C. S. Liu, Gagan Kumar, D. B. Singh, V. K. Tripathi

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12 Scopus citations


Two parallel metal sheets, separated by a vacuum region, support a surface plasma wave whose amplitude is maximum on the two parallel interfaces and minimum in the middle. This mode can be excited by a laser using a glass prism. An electron beam launched into the middle region experiences a longitudinal ponderomotive force due to the surface plasma wave and gets accelerated to velocities of the order of phase velocity of the surface wave. The scheme is viable to achieve beams of tens of keV energy. In the case of a surface plasma wave excited on a single metal-vacuum interface, the field gradient normal to the interface pushes the electrons away from the high field region, limiting the acceleration process. The acceleration energy thus achieved is in agreement with the experimental observations.

Original languageEnglish
Article number113301
JournalJournal of Applied Physics
Issue number11
StatePublished - 2007
Externally publishedYes

Bibliographical note

Funding Information:
G.K. is grateful to CSIR for the financial support.


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