Measurement of hot electron momentum relaxation times in metals by femtosecond ellipsometry
Physical Review B - Condensed Matter and Materials Physics
American Physical Society
Time-resolved ellipsometric measurements were made upon Au, Cu, Ag, Ni, Pd, Ti, Zr, and Hf thin films. Using an elliptically polarized pump beam, the decay of the optically induced polarization of the sample was observed. Characteristic relaxation times are extracted and interpreted in terms of scattering of linear and angular momentum of hot electrons. A systematic variation is observed between different metals that reflects their underlying band structure.
Copyright © 2005 The American Physical Society
Vol. 71 (23), article 233104