Open AccessMultiple excitation of localized surface plasmon to create a 10 nm × 10 nm strong optical spot using an Au nanoparticle array-based ridge waveguide
Author(s) -
Sung Mook Kang,
Jin Woo Han,
Taeseob Kim,
No Cheol Park,
Kyoung Su Park,
Byung Kwon Min,
Young Pil Park
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.18.001576
Subject(s) - surface plasmon , optics , waveguide , ridge , excitation , materials science , full width at half maximum , finite difference time domain method , plasmon , surface plasmon polariton , optoelectronics , physics , paleontology , quantum mechanics , biology
We present a description of a multiple excitation of localized surface plasmons (LSPs) from an Au nanoparticle (NP) array-based ridge waveguide to create a small optical spot size with an extremely strong intensity. Using a numerical finite-difference time-domain method, we find that the optical intensity of the ridge waveguide with an Au NP array is about 700% higher than that of a simple ridge waveguide. Moreover, the spacing between the NPs plays an important role in the multiple excitation of LSPs. The spot size, calculated at FWHM, is 10 nm x 10 nm at a distance of 5 nm from the exit plane.