Journal
NANO LETTERS
Volume 11, Issue 3, Pages 960-965Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl103408h
Keywords
Plasmonic nanostructure; nanodisk; nanoaperture; scanning near-field optical microscope; enhanced light transmission
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Funding
- Asahi Glass Foundation
- Japan Society for the Promotion of Science [18205004, 18685003, 19049015, 22655007, 22225002]
- Ministry of Education, Culture, Sports, Science, and Technology [18205004, 18685003, 19049015, 22655007, 22225002]
- Grants-in-Aid for Scientific Research [19049015, 18685003, 18205004, 22655007, 22225002] Funding Source: KAKEN
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We report an anomalous light transmission phenomenon for a nanoaperture on an opaque screen when the aperture is covered with an opaque cap. In conventional optics, light transmission must decrease when the aperture is capped. However, we found that light transmission is enhanced when the nanodisk is in close proximity to the aperture at a wavelength dose to the plasmon resonance. This effect even occurs when the disk is larger than the aperture.
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