The picosecond ultrasonic waves in Au/V multilayers

• Autorzy: Aleksiejuk M.
• Języki publikacji: EN

Abstrakty

EN

A study of picosecond ultrasonic waves propagation in Au/V superlattices in period 30-120 A is presented. Au/V structures were grown by molecular beam epitaxy (MBE) on MgO substrate. High-frequency ultrasonic waves in Au/V structures were generated by using ultrashort laser pulse excitation and detected in real time by measuring the strain-induced change in reflectivity with pump-probe technique. High-frequency oscillations were detected over the first 150 ps. Series of the oscilations were generated when therminated layer is made of the material with the lowest acoustic impedance (vanadium for Au/V multilayer). The author attributes these oscillations to surface mode localized in the frequency band gap of the dispersion curve.

Słowa kluczowe

EN

picosecond ultrasonic waves in Au/V; propagation of waves; superlattice; molecular beam epitaxy

PL

fala naddźwiękowa pikosekundowa w Au/V; propagacja fal; supersieć; MBE

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Journal of Technical Physics
• Rocznik: 2004
• Tom: Vol. 45, no 3
• Strony: 211--216
• Opis fizyczny: Bibliogr. 14 poz., wykr.

Twórcy

autor

Aleksiejuk M.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Świetokrzyska 21, 00-049 Warsaw, Poland

Bibliografia

• 1. R.M. WHITE, Generation of elastic waves by transient surface heating, J. Appl. Phys., 34, 3559, 1963.
• 2. C.B. SCRUBY, R.J. DEWHURST, D.A. HUTCHINS, S.B. PALMER, Quantative studies of thermally generated elastic waves in laser-irradeted metals, J. Appl. Phys., 51, 6210, 1980.
• 3. R.J. DEWHURST, W.S. AL RUBAI, Generation of short acoustics pulses from an energetic picosecond laser, Ultrasonics, 27, 262, 1989.
• 4. L.F.R. ROSE, Point-source representation for laser-genereted ultrasound, J. Acoust. Soc. Am., 75, 723, 1975.
• 5. C.A. CALDER, W.W. WJLCOX, Technique for measurement of elastic constants by laser energy deposition, Rev. Sci. Instrum., 45, 1557, 1974.
• G. H.K. WICKRAMASINGHE, R.C. BRAY, V. JiPSON, C.F. QUOTE, J.R SALCEDO, Photoacoustics on microscope scale, Appl. Phys. Lett, 33, 923, 1978.
• 7.bC.THOMSEN, H.T. GRAHN, H.J. MARIS, J. TAUC, Surface generation and detection of phononsbby picosecond light pulses, Phys. Rev., B34, G, 4129, 1986.
• 8. P. BASSERAS, S.M. GRACEWSKI, G.W. WICKS, R.J.D. MILLER, Optical generation of high-frequency acoustic waves in GaAs/AlxGa1-x as periodic multilayer structures, Appl. Phys., 75, 6, 2761, 1994.
• 9. B. BONELLO, B. PERRIN, E. ROMATET, J.-C JEANNET, Application of the picosecond ultrasonic technique to the study of elastic and time-resolved thermal properties of materials, Ultrasonics, 35, 223-231, 1997.
• 10. M. ALEKSIEJUK, B. BONELLO, T. BACZEWSKT, A. WAWRO, Procedings of Tenth ISCMP, The picosecond ultrasonic waves in Cu-Co multilayers, Thin Film Materials and Devices - Developments in Science and Technology, World Scientific, 453-457, Singapore 1999.
• 11. K.C SUN, F. VALLEE, L. ACIOLI, E.P. IPPEN, J.G. FUJIMOTO, Femtosecond investigation of electron thermalization in gold, Phys. Rev., B48, 12365, 1993.
• 12.A. MIKLOS, A. LORINCZ, Determination of thermal properties of thin metal films from pulsed thermoreflectancc measurements in the picosecond regime, Appl. Phys., B48, 2G1, 1989.
• 13. S.M. RYTOV, Acoustic properties of fine-grained medium [in Russian], Akust. Zh., 2, 68, 1956.
• 14. G. SRIVASTAVA, The physics of phonons, Adam Hilger, Bristol 1990.