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

Tanaka, Kenji; Hosaka, Hiroshi; Itao, Kiyoshi; Oumi, Manabu; Niwa, Takashi; Miyatanu, Tatsuya; Mitsuoka, Yasuyuki; Nakajima, Kunio; Ohkubo, Toshifumi
August 2003
Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1083
Academic Journal
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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