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

Year: 2009

Authors: Mojarad N.M., Agio M.

Autors Affiliation: Swiss Fed Inst Technol, Phys Chem Lab, Nanoopt Grp, CH-8093 Zurich, Switzerland.

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.

Journal/Review: OPTICS EXPRESS

Volume: 17 (1)      Pages from: 117  to: 122

More Information: We thank V. Sandoghdar for continuous support and encouragement. We are also indebted to G. Zumofen and M. H. Eghlidi for fruitful discussions. This work was supported by ETH Zurich.
KeyWords: Electromagnetic Diffraction; Au Nanoparticles; Optical-systems; Scattering; Microscopy; Particles; Modes; Light; Field
DOI: 10.1364/OE.17.000117

Citations: 46
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