Multiple excitation of localized surface plasmon to create a 10 nm x 10 nm strong optical spot using an Au nanoparticle array-based ridge waveguide.
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.
Kang
Sung-Mook
SM
Center for Information Storage Device (CISD), Yonsei University, Seoul, Korea.
Han
Jin
J
Kim
Taeseob
T
Park
No-Cheol
NC
Park
Kyoung-Su
KS
Min
Byung-Kwon
BK
Park
Young-Pil
YP
D006046:Gold / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008029:Lighting / Q000379:methods*; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
D006046:Gold