Size dependence of dipole and quadrupole plasmon resonances in light induced sodium clusters

A. Derkatchova; K. Kolwas

doi:10.1117/12.629494

1 June 2005 Size dependence of dipole and quadrupole plasmon resonances in light induced sodium clusters

A. Derkatchova, K. Kolwas

Proceedings Volume 5849, Fifth Workshop on Atomic and Molecular Physics; (2005) https://doi.org/10.1117/12.629494
Event: Fifth Workshop on Atomic and Molecular Physics, 2004, Jurata, Poland

Abstract

The dependence of the optical properties of large sodium clusters as a function of their size is studied. Clusters are light induced allowing observation of the smooth change of their sizes as a result of the spontaneous nucleation process. We combine the formalism of the classical Mie scattering theory for spheres of arbitrary large size and the concept of the collective electron oscillations (plasmons). The maxima in normalized intensities of light scattered by single cluster we attribute to resonant excitation of dipole and quadrupole plasmon oscillation respectively. We show that plasmon resonances take place for different cluster sizes when excited with different wavelength. We compare these results with expectations resulting from solving the problem of eigenfrequencies of free-electron sphere with the dielectric function described within the Lorentz-Drude model.

Citation Download Citation

A. Derkatchova and K. Kolwas "Size dependence of dipole and quadrupole plasmon resonances in light induced sodium clusters", Proc. SPIE 5849, Fifth Workshop on Atomic and Molecular Physics, (1 June 2005); https://doi.org/10.1117/12.629494

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