Optical excitation of a coherent transverse optical phonon in a polycrystalline Zr metal film

V. V. Kruglyak, R. J. Hicken, G. P. Srivastava, M. Ali, B. J. Hickey, A. T. G. Pym, and B. K. Tanner
Phys. Rev. B 76, 012301 – Published 5 July 2007

Abstract

Optical pump-probe measurements of transient reflectivity were made on a sputtered polycrystalline thin film of hcp Zr. On top of a slow multiexponential decay, an oscillatory signal was observed with frequency varying from the initial value of f0=2.24±0.06THz at zero time delay to a value of 2.56±0.12THz after 2ps, which is similar to that of a transverse optical (TO) phonon near the Γ point of the Brillouin zone. From the data, the TO phonon relaxation time was determined to be 0.67ps. The excitation of the coherent phonon was identified as being mediated by resonant coherent Raman scattering.

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  • Received 2 March 2007

DOI:https://doi.org/10.1103/PhysRevB.76.012301

©2007 American Physical Society

Authors & Affiliations

V. V. Kruglyak*, R. J. Hicken, and G. P. Srivastava

  • 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

  • *v.v.kruglyak@exeter.ac.uk

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Issue

Vol. 76, Iss. 1 — 1 July 2007

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