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14 February 2007 Effect of metallic nanowires on the sensitivity enhancement of surface plasmon resonance biosensors
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Abstract
In this study, we experimentally confirmed the sensitivity enhancement by the nanowire-based surface plasmon resonance (SPR) sensor structure. Gold nanowire samples with a period of 500 nm were fabricated by interference lithography on a gold-SF10 glass substrate. Sensitivity enhancement compared to a conventional SPR structure was measured to be 31% when evaluated using a varied concentration of ethanol at a dielectric surrounding layer. This result is consistent with numerical data of rigorous coupled-wave analysis. Rough surfaces of thin gold film and gold nanowires are deemed to induce the sensitivity degradation by more than 10%. More significant sensitivity improvement can be achieved by implementing finer nanowires.
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Kyung Min Byun, Soon Joon Yoon, Donghyun Kim, and Sung June Kim "Effect of metallic nanowires on the sensitivity enhancement of surface plasmon resonance biosensors", Proc. SPIE 6450, Plasmonics in Biology and Medicine IV, 64500H (14 February 2007); https://doi.org/10.1117/12.699914
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