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Calculated spectra of quadrumers in different dielectric environments. (a) The dip of Fano resonance is highly sensitive to the surrounding; (b) Scattering spectra of a quadrumer embedded in environments of different index of refraction; (c) The calculated figure of merit. The inset shows the calculated sensitivity to be 647 nm/RIU. Reprinted with permission from Reference [94]. Copyright (2010) American Chemical Society.
