Coherent vibrations of submicron spherical gold shells in a photonic crystal

Details Coherent vibrations of submicron spherical gold shells in a photonic crystal Coherent vibrations of submicron spherical gold shells in a photonic crystal

2006-07-31

arxiv.org/abs/cond-mat/0607812v2

Physical Review B 75, 161102(R) (2007)

Physics

Condensed Matter

Other Condensed Matter

Error in Eqs.2 and 3 corrected; Tabl. I corrected; Fig.1 revised; a model that explains the dependence of the oscillation ampl

Scientific paper

10.1103/PhysRevB.75.161102

Coherent acoustic radial oscillations of thin spherical gold shells of submicron diameter excited by an ultrashort optical pulse are observed in the form of pronounced modulations of the transient reflectivity on a subnanosecond time scale. Strong acousto-optical coupling in a photonic crystal enhances the modulation of the transient reflectivity up to 4%. The frequency of these oscillations is demonstrated to be in good agreement with Lamb theory of free gold shells.

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