27 September 2016 Sensors based on visible collective resonances of plasmonic lattices
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Abstract
We show arrays of large gold nanodisks on glass substrates can support strong optical features with narrow spectral widths associated with their collective plasmonic-lattice modes. Our results show that these modes can offer significant sensitivity to the refractive index of the environment, far more than those of individual nanodisks. We show the visible collective modes supported by such arrays can distinctively detect a monolayer of biotin with high resolution. We use donor (CdSe/ZnS) and acceptor (CuInS/ZnS) quantum dots to investigate the field properties of these arrays after deposition of a thick layer of a silicon. We demonstrate a distinct increase of emission of CuInS/ZnS quantum dots, indicating the possibility of enhancement of energy transfer between these two types of quantum dots.
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Seyed M. Sadeghi, Waylin J. Wing, Quinn Campbell, "Sensors based on visible collective resonances of plasmonic lattices", Proc. SPIE 9930, Biosensing and Nanomedicine IX, 993006 (27 September 2016); doi: 10.1117/12.2238407; https://doi.org/10.1117/12.2238407
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