30 September 2013 Surface multiplasmonics for optical sensing
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Multiple surface plasmon-polariton (SPP)-wave modes can be guided by the interface of a metal and a chiral sculptured thin film (STF). Theory predicts that the angular locations of SPP-wave modes will be shifted if the void regions of the chiral STF are infiltrated with a liquid. Therefore, chiral STFs of lanthanum fluoride were fabricated and employed as a partnering dielectric material to an aluminum thin film to guide multiple SPP-wave modes. The SPP-wave modes shifted to higher angular locations when the refractive index of the infiltrant was increased, exhibiting sensitivity comparable to state-of-research values. Thereby, surface multiplasmonics was exploited for optical sensing.
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Stephen E. Swiontek, Drew P. Pulsifer, Akhlesh Lakhtakia, "Surface multiplasmonics for optical sensing", Proc. SPIE 8833, Tribute to H. John Caulfield, 883309 (30 September 2013); doi: 10.1117/12.2022273; https://doi.org/10.1117/12.2022273

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