Nonlinear absorption of surface Plasmons and emission of electrons from metallic targets

D. B. Singh*, Gagan Kumar, V. K. Tripathi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A large-amplitude surface plasma wave (SPW) over a metal-vacuum, interface Ohmically heats the electrons and undergoes nonlinear absorption. The attenuation rate increases with the local SPW amplitude. The enhanced electron temperature leads to stronger thermionic emission of electrons. At typical Nd:glass laser intensity IL=7 GW/cm2, if one takes the amplitude of the SPW to be ≈6 times the amplitude of the laser, one obtains the thermionic electron emission current density J=200 A/cm2. However, the emission current density decreases with propagation distance at a much faster rate than the SPW amplitude and electron temperature.

Original languageEnglish
Article number102108
JournalPhysics of Plasmas
Volume14
Issue number10
DOIs
StatePublished - 2007
Externally publishedYes

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