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Physics of Plasmas / Volume 14 / Issue 10 / ARTICLES / Basic Plasma Phenomena, Waves, Instabilities

Phys. Plasmas 14, 102108 (2007); doi:10.1063/1.2799173 (4 pages)

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

D. B. Singh1, Gagan Kumar2, and V. K. Tripathi2

1Laser Science and Technology Centre, Metcalfe House, Delhi-110054, India
2Department of Physics, Indian Institute of Technology, New Delhi-110016, India

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(Received 18 June 2007; accepted 21 September 2007; published online 24 October 2007)

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.

© 2007 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. NONLINEAR ABSORPTION OF SURFACE PLASMONS
    1. Electron heating
  3. SPW INDUCED ELECTRON EMISSION
  4. DISCUSSION

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KEYWORDS and PACS

Keywords

current density, surface plasmons, thermionic electron emission

PACS

  • 79.40.+z

    Thermionic emission

  • 73.20.Mf

    Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.2799173

PUBLICATION DATA

ISSN:

1070-664X (print)  
1089-7674 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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