Open AccessStudy of surface plasmon chirality induced by Archimedes’ spiral grooves
Author(s) -
Tomoki Ohno,
S. Miyanishi
Publication year - 2006
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.14.006285
Subject(s) - surface plasmon , chirality (physics) , optics , nanophotonics , plasmon , finite difference time domain method , ray , surface plasmon polariton , circular polarization , spiral (railway) , materials science , localized surface plasmon , excitation , physics , quantum mechanics , mathematical analysis , chiral symmetry breaking , mathematics , nambu–jona lasinio model , quark , microstrip
A chirality of surface plasmons excited on a silver film with Archimedes' spiral grooves during incidence of a circularly polarized light is analytically and numerically studied by using the finite-difference time-domain (FDTD) modeling method. We found that the surface of a plasmon has selective chirality, which is given by the sum of the chiralities of the incident light and the spiral structure. The surface plasmons with the chirality lead to zero-order, first-order, and high-order evanescent Bessel beams with electric charge distributions on the film. This selectivity could be widely applied for chiral detection of the incident light and chiral excitation of several optical modes in nanophotonics.