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Coherent acoustic vibration of metal nanoshells

C. Guillon·P. Langot·N. Del Fatti·F. Vallee·A. S. Kirakosyan·T. V. Shahbazyan·T. Cardinal·M. Treguer
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Abstract

Using time-resolved pump-probe spectroscopy we have performed the first investigation of the vibrational modes of gold nanoshells. The fundamental isotropic mode launched by a femtosecond pump pulse manifests itself in a pronounced time-domain modulation of the differential transmission probed at the frequency of nanoshell surface plasmon resonance. The modulation amplitude is significantly stronger and the period is longer than in a gold nanoparticle of the same overall size, in agreement with theoretical calculations. This distinct acoustical signature of nanoshells provides a new and efficient method for identifying these versatile nanostructures and for studying their mechanical and structural properties.

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C. Guillon, P. Langot, N. Del Fatti, F. Vallee, A. S. Kirakosyan, T. V. Shahbazyan, T. Cardinal, M. Treguer. 2007-01-10. Coherent acoustic vibration of metal nanoshells. https://doi.org/10.1021/nl062380d

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