表面プラズモン共鳴による近接場光の増強

概要

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This paper discusses a technology for enhancing near-field light by controlling surface plasmons. Nearfield light is effective for creating a very small heat spots, since it is localized at surface of a material. The resonance of surface plasmons at a metal surface can control the distribution of the intensity of the nearfield. A concentric ring structure on a silver metal film was investigated as a plasmon- enhancement structure for high-density recording devices. Far-field measurements showed that the transmitted light was enhanced by a factor of 125. A hard-disk-drive-type head with a ring-type surface plasmon enhancement structure and a hole 100 nm in diameter was fabricated. The head generated near-field light at least a hundred times as strong as that generated by a simple hole 100 nm in diameter.
社団法人日本磁気学会の論文
2004-06-01