Nonlinear absorption of femtosecond laser on a metal surface embedded by metallic nanoparticles

Amir Ahmad, V. K. Tripathi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Metal surface with nanosize roughness is modeled as a plane surface embedded with clusters. A high power femtosecond laser pulse normally incident on the metal surface undergoes field enhancement when laser frequency equals the frequency of surface charge oscillations of the clusters. The enhanced field causes increased absorption of the laser pulse. The model suggests that the increase in absorption decreases with the increase of the laser power. The results are in line with recent observations.

Original languageEnglish
Article number153112
JournalApplied Physics Letters
Volume89
Issue number15
DOIs
Publication statusPublished - 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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