Influence of groove depth and surface profile on fluorescence enhancement by grating-coupled surface plasmon resonance
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The fluorescence intensity of a sample placed on a metal grating pattern is enhanced due to excitation by the electric field of the grating-coupled surface plasmon resonance (GC-SPR). The dependence of the enhancement on groove depth and surface profile was studied with the aim of improving the sensitivity of fluorescence detection. The enhancement was found to depend on the groove depth, with intensity most enhanced on grating substrate of about 20 nm depth, which produced an intensity about 30 times greater than that on a flat borosilicate glass substrate. Rigorous coupled wave analysis calculation showed that the shape of the groove influenced GC-SPR, suggesting that controlling not only the depth but also the shape of the grating surface profile can be an important factor in improving the sensitivity of detection by fluorescence microscopy.
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- Influence of groove depth and surface profile on fluorescence enhancement by grating-coupled surface plasmon resonance
Volume 16, Issue 2 , pp 216-221
- Cover Date
- Print ISSN
- Online ISSN
- Optical Society of Japan
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- surface plasmon resonance
- grating structure
- sensitivity of fluorescence detection
- Industry Sectors
- Author Affiliations
- 2. Research Institute for Cell Engineering, National Institute of Advanced Industrial Science and Technology, Ikeda, Osaka, 563-8577, Japan
- 1. Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Ikeda, Osaka, 563-8577, Japan