Plasmonic nanofocusing using a metal-coated axicon prism | Zendy

Keisuke Kato | Zendy; Atsushi Ono | Zendy; Wataru Inami | Zendy; Yoshimasa Kawata | Zendy

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Plasmonic nanofocusing using a metal-coated axicon prism

Author(s) -

Keisuke Kato,

Atsushi Ono,

Wataru Inami,

Yoshimasa Kawata

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.013580

Subject(s) - axicon , optics , prism , surface plasmon , materials science , plasmon , excitation , polarization (electrochemistry) , physics , laser , laser beams , chemistry , quantum mechanics

We propose an excitation method for the localization of photons at the apex of a metal coated axicon prism. The cone angle of the prism and the metallic film thickness are designed to match the excitation conditions for surface plasmons. The plasmons propagate along the sides of the prism and converge at its apex. The resulting nanofocusing was investigated by simulating the intensity distributions around the apex of the prism using a finite-difference time-domain algorithm. For incident radial polarization, a localized and field enhanced spot is generated by the constructive interference of surface plasmons.

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