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Effect of metallic nanowires on the sensitivity enhancement of surface plasmon resonance biosensors
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- Authors
- Issue Date
- 2007-01-20
- Citation
- SPIE Photonics West, San Jose, California USA, 20-25 January 2007
- 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.
- Language
- English
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