Open AccessEffect of surface plasmon resonance on the optical activity of chiral metal nanogratings
Author(s) -
Kuniaki Konishi,
Takashige Sugimoto,
Benfeng Bai,
Yuri Svirko,
Makoto KuwataGonokami
Publication year - 2007
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.15.009575
Subject(s) - optics , materials science , surface plasmon , surface plasmon resonance , polarization (electrochemistry) , electric field , grating , diffraction , surface plasmon polariton , metamaterial , dielectric , diffraction grating , plasmon , optoelectronics , physics , nanotechnology , chemistry , quantum mechanics , nanoparticle
We examine the mechanism responsible for the optical activity of a two-dimensional array of gold nanostructures with no mirror symmetry on a dielectric substrate. Measurements with different incident angles, polarizations and sample orientations allow us to reveal that observed polarization effect is enhanced by surface plasmon resonance. By performing numerical simulation with rigorous diffraction theory we also show that the grating chirality can be described in terms of the non-coplanarity of the electric field vectors at the front (air-metal) and back (substrate-metal) sides of the grating layer.