Title :
Nanofabrication and Evanescent Light Enhancement by Surface Plasmon
Author_Institution :
Dept. of Inf. & Commun., Tokai Univ., Shizuoka
Abstract :
Metallic nanostructure gratings made up of GaP substrate and covered by gold thin film have been designed and fabricated in order to enhance the near-field light waves emitted from 30-nm apertures in the thin metallic film for throughput-efficiency increments, thereby utilizing the surface plasmon resonance effect with the nanofabricated metallic grating pitch. Theoretical analysis herein emphasizes 3-D simulation using the finite-difference time-domain method. It also experimentally shows that the near-field light from a 30-nm aperture encased in fine pitch corrugated gold thin film creates an enhancement of resonance intensity. The evanescent light output was enhanced up to 1.5% of the input linear polarized laser light without using any microlens-focused laser beam
Keywords :
diffraction gratings; finite difference time-domain analysis; gold; metallic thin films; nanostructured materials; nanotechnology; optical design techniques; optical disc storage; optical fabrication; plasmonics; surface plasmons; 30 nm; 3D finite difference time domain simulation; Au; GaP; apertures; evanescent light enhancement; fine pitch corrugated gold thin films; linear polarizer laser light; metallic nanostructure gratings; nanofabrication; near field light; near field light wave emission; resonance intensity; surface plasmon resonance; throughput efficiency; Apertures; Gold; Gratings; Nanofabrication; Plasmons; Resonance; Substrates; Surface emitting lasers; Surface waves; Transistors; Nanofabrication; nanograting; optical disk head; plasmonics; surface plasmon;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.888461
