3 October 2006 Enhanced transmission through a nanoslit bordered by both trenches and bumps nanostructures
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Abstract
A very large transmission, 20%, of light through a nano metallic slit bordered by both nano trenches and bumps has been demonstrated theoretically. The trenches bordering the nano slit, are used to excite free-space light into surface waves, while the bumps bordering the trenches are used to confine surface wave leakage. Over 50% of the escaping surface waves can be reclaimed by using a pair of bumps with a reflectivity larger than 99%. As a result, the transmission of a trench-surrounded slit bordered by a pair of bumps can be enhanced 1.5 fold.
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C. M. Wang, C. C. Chao, J. Y. Chang, "Enhanced transmission through a nanoslit bordered by both trenches and bumps nanostructures", Proc. SPIE 6324, Plasmonics: Nanoimaging, Nanofabrication, and their Applications II, 632411 (3 October 2006); doi: 10.1117/12.679907; https://doi.org/10.1117/12.679907
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