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Paper detail

Refractive-index sensing with ultra-thin plasmonic nanotubes

We study the refractive-index sensing properties of plasmonic nanotubes with a dielectric core and ultra-thin metal shell. The few-nm thin metal shell is described by both the usual Drude model and the nonlocal hydrodynamic model to investigate the effects of nonlocality. We derive an analytical expression for the extinction cross section and show how sensing of the refractive index of the surrounding medium and the figure-of-merit are affected by the shape and size of the nanotubes. Comparison with other localized surface plasmon resonance sensors reveals that the nanotube exhibits superior sensitivity and comparable figure-of-merit.

preprint2012arXivOpen access
S. RazaG. ToscanoA. -P. JauhoN. A. MortensenM. Wubs
cond-mat.mes-hallphysics.optics
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S. RazaG. ToscanoA. -P. JauhoN. A. MortensenM. Wubs

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