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Improvements in near-field optical performance using localized surface plasmon excitation by a scatterer-formed aperture

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9 Author(s)
Tanaka, Kenji ; Graduate School of Frontier Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan ; Hosaka, H. ; Itao, K. ; Oumi, M.
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Near-field optical performance is greatly improved using our proposed near-field structure, in which a metal scatterer formed in an aperture enhances localized surface plasmon (LSP) excitation and functions as an alternative near-field light source. Based on the design through a finite-difference time-domain method, the scatterer-formed aperture is fabricated with an electron beam technique, and its near-field optical distribution is observed using a scanning near-field optical microscope. The scatterer-formed aperture enhances the near-field optical energy due to LSP excitation, thereby realizing a significant and simultaneous improvement in throughput and spatial resolution. © 2003 American Institute of Physics.

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Applied Physics Letters  (Volume:83 ,  Issue: 6 )