TITLE

Chirp effects in femtosecond laser-induced surface second-harmonic generation from metals

AUTHOR(S)
Teng, H.; Guo, Chunlei
PUB. DATE
August 2004
SOURCE
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Chirp effects are studied in femtosecond laser-induced surface second-harmonic generation (SHG) from gold. We observe a higher SHG yield when the incident laser pulses are negatively chirped, compared to using the transform-limited or positively chirped pulses. This study indicates that SHG is critically dependent on the exciting wavelength sequence within the femtosecond pulse bandwidth when electrons contributing to SHG are heated to a sufficiently high temperature and are in thermal nonequilibrium distribution with the lattice.
ACCESSION #
14085059

 

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