2024-03-28T21:53:01Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/426962022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Optical generation of surface acoustic waves guided at the linear boundary between two thin filmsMaznev, A. A.Kelf, Timothy A.Tomoda, MotonobuMatsuda, OsamuWright, Oliver B.high-speed optical techniqueslocalised modessubstratessurface acoustic wavesthin films425Laser-induced transient grating measurements and ultrafast optical pump-probe imaging of surface acoustic waves near a linear boundary between copper and silica films on a silicon substrate indicate the presence of a boundary-localized mode with a phase velocity slightly below the Rayleigh wave velocity on the copper film. We analyze in detail the dispersion of this localized mode in comparison with that of the Rayleigh waves in the surrounding materials. The existence of the localized mode is ascribed to the nonuniformity of the copper film thickness near its edge resulting from polishing during fabrication.American Institute of PhysicsJournal Articleapplication/pdfhttp://hdl.handle.net/2115/42696https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/42696/1/JAP107-3_033521.pdf0021-8979Journal of Applied Physics10730335212010-02-01enginfo:doi/10.1063/1.3298472Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 107, 033521 (2010) and may be found at https://dx.doi.org/10.1063/1.3298472publisher