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Surface acoustic waves with negative group velocity in a thin film structure on silicon

Tue, 2009-07-07 01:00 — Guest
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A. A. Maznev and A. G. Every
A surface acoustic wave dispersion curve of a thin film structure on silicon measured with the laser-induced transient grating technique displays a local minimum in frequency at nonzero wavenumber. For a range of wavenumbers to one side of this minimum the dispersion curve is of negative slope, impl ... [Appl. Phys. Lett. 95, 011903 (2009)] published Mon Jul 6, 2009.

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