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Femtosecond Laser Interaction with Metallic Tungsten and Nonequilibrium Electron and Lattice Temperatures,
MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
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High-intensity, 75-fs optical pulses have been applied to observe multiphoton and thermally enhanced photoemission from a tungsten metal surface. Experimental results suggest the presence of anomalous heating, a transient nonequilibrium temperature difference between the electrons and lattice. Pump- probe measurements indicate an electron-phonon energy relaxation time of several hundred femtoseconds. Additional keywords Equations, Photoelectric emission, Army research, Reprints.
APPROVED FOR PUBLIC RELEASE