Transient Response Of Metals To Ultrashort Pulse Excitation

An ultrashort light pulse illuminating a metal surface interacts primarily with the electrons. During a transient phase the electrons can be much hotter than the lattice. A two-temperature model predicts that the optical damage threshold of metals will be independent of the optical pulse duration fo...

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Bibliographic Details
Published in:Optical Engineering 1989-10, Vol.28 (10), p.281114-281114
Main Authors: Sherman, N. K, Brunel, F, Corkum, P. B, Hegmann, F. A
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron and ion emission by liquids and solids
impact phenomena
Exact sciences and technology
Impact phenomena (including electron spectra and sputtering)
Laser-beam impact phenomena
Metals. Metallurgy
Physics
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Summary:An ultrashort light pulse illuminating a metal surface interacts primarily with the electrons. During a transient phase the electrons can be much hotter than the lattice. A two-temperature model predicts that the optical damage threshold of metals will be independent of the optical pulse duration for short pulses. Experiments performed with picosecond 10 um pulses confirm this prediction. The model also predicts, and we experimentally observe, electron emission during the transient phase even for illumination intensities below the damage threshold.
ISSN:0091-3286
1560-2303
DOI:10.1117/12.7977096