Measurement of hot electron momentum relaxation times in metals by femtosecond ellipsometry

V. V. Kruglyak, R. J. Hicken, M. Ali, B. J. Hickey, A. T. G. Pym, and B. K. Tanner
Phys. Rev. B 71, 233104 – Published 16 June 2005

Abstract

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.

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  • Received 28 February 2005

DOI:https://doi.org/10.1103/PhysRevB.71.233104

©2005 American Physical Society

Authors & Affiliations

V. V. Kruglyak* and R. J. Hicken

  • School of Physics, University of Exeter, Exeter EX4 4QL, United Kingdom

M. Ali and B. J. Hickey

  • Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom

A. T. G. Pym and B. K. Tanner

  • Department of Physics, University of Durham, Durham DH1 3LE, United Kingdom

  • *Author to whom correspondence should be addressed. Email address: V.V.Kruglyak@exeter.ac.uk

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Issue

Vol. 71, Iss. 23 — 15 June 2005

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