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Nanoscale metal stripes support plasmonic modes with strongly confined fields. When combined with a waveguide-coupled
microfluidic system, these stripes can provide highly sub-wavelength excitation regions for single biomolecule
sensing, e.g. dark-field fluorescence detection of tagged DNA. Using a prism coupled geometry, we experimentally
characterize the dispersion of plasmon modes in 80-500 nm wide metal stripes. Our results agree well with numerical
modeling. We investigate how the stripe morphology affects the mode distribution and dispersion, and consider the
implications for integrated near field fluorescence excitation.
Paul Steinvurzel,Tian Yang, andKenneth B. Crozier
"Experimental characterization of dispersion in plasmonic nanostripes for integrated DNA sensing", Proc. SPIE 7604, Integrated Optics: Devices, Materials, and Technologies XIV, 760417 (11 February 2010); https://doi.org/10.1117/12.842797
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Paul Steinvurzel, Tian Yang, Kenneth B. Crozier, "Experimental characterization of dispersion in plasmonic nanostripes for integrated DNA sensing," Proc. SPIE 7604, Integrated Optics: Devices, Materials, and Technologies XIV, 760417 (11 February 2010); https://doi.org/10.1117/12.842797