Tailoring the excitation of localized surface plasmon-polariton resonances by focusing radially-polarized beams.
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.
Mojarad
Nassiredin M
NM
Nano-Optics Group, Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland. nassiredin.mojarad@phys.chem.ethz.ch
Agio
Mario
M
D004560:Electricity; D001330:Electronic Data Processing; D005898:Glass; D008027:Light; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D036103:Nanotechnology / Q000379:methods; D016011:Normal Distribution; D055095:Optics and Photonics; D011789:Quantum Theory; D012834:Silver; D020349:Surface Plasmon Resonance / Q000379:methods*
D008670:Metals; D012834:Silver