Accession Number:

ADA151406

Title:

Femtosecond Laser Interaction with Metallic Tungsten and Nonequilibrium Electron and Lattice Temperatures,

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS

Personal Author(s):

• Fujimoto, J. G.
• Liu, J. M.
• Ippen, E. P.
• Bloembergen, N.

Report Date:

1984-11-05

Pagination or Media Count:

5.0

Abstract:

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.

Descriptors:

• *LASERS
• ELECTRONS
• EMISSION
• INTERACTIONS
• PHONONS
• RELAXATION TIME
• REPRINTS
• TUNGSTEN

Subject Categories:

• Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE