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Article Dans Une Revue Nano Letters Année : 2007

Coherent acoustic vibration of metal nanoshells

Résumé

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.

Dates et versions

hal-00267037 , version 1 (26-03-2008)

Identifiants

Citer

C. Guillon, P. Langot, N. del Fatti, F. Vallee, A. S. Kirakosyan, et al.. Coherent acoustic vibration of metal nanoshells. Nano Letters, 2007, 7 (1), pp.138-142. ⟨10.1021/nl062380d⟩. ⟨hal-00267037⟩

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