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
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