Femtosecond laser interaction with metallic tungsten and nonequilibrium electron and lattice temperatures

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 temp. difference between the electrons and lattice. Pump-probe...

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Veröffentlicht in:	Physical review letters 1984-11, Vol.53 (19), p.1837-1840
Hauptverfasser:	FUJIMOTO, J. G, LIU, J. M, IPPEN, E. P, BLOEMBERGEN, N
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology 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 Materials science Metals, semimetals and alloys Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Other interactions of matter with particles and radiation Physics Specific materials
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Beschreibung
Zusammenfassung:	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 temp. difference between the electrons and lattice. Pump-probe measurements indicate an electron--phonon energy relaxation time of several hundred femtoseconds. 11 ref.--AA
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.53.1837