Journal
NANOTECHNOLOGY
Volume 23, Issue 49, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/49/495201
Keywords
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Funding
- National Science Foundation [1102070]
- Center for Micro/Nano Systems and Nanotechnology at the University of Missouri, Columbia
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1102070] Funding Source: National Science Foundation
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We demonstrate strong electromagnetic field enhancement from nano-gaps embedded in silver gratings for visible wavelengths. These structures fabricated using a store-bought HD-DVD worth $10 and conventional micro-contact printing techniques have shown maximum fluorescence enhancement factors of up to 118 times when compared to a glass substrate under epi-fluorescent conditions. The novel fabrication procedure provides for the development of a cost-effective and facile plasmonic substrate for low-level chemical and biological detection. Electromagnetic field simulations were also performed that reveal the strong field confinement in the nano-gap region embedded in the silver grating, which is attributed to the combined effect of localized as well as propagating surface plasmons.
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