Tailoring the excitation of localized surface plasmon-polariton resonances by focusing radially-polarized beams

Abstract

We study the interaction of focused radially-polarized light with metal nanospheres. By expanding the electromagnetic field in terms of multipoles, we gain insight on the excitation of localized surface plasmon-polariton resonances in the nanoparticle. We show that focused radially-polarized beams offer more opportunities than a focused plane wave or a Gaussian beam for tuning the near- and far-field system response. These results find applications in nano-optics, optical tweezers, and optical data storage.

arXiv comment4 pages, 3 figures

References in corpus (1)

• Plasmon spectra of nanospheres under a tightly focused beam

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