An antisymmetric plasmon resonance in coupled gold nanoparticles as a sensitive tool for detection of local index of refraction
A. N. Grigorenko, H. F. Gleeson, Y. Zhang, N. W. Roberts, A. R. Sidorov, A. A. Panteleev
Abstract
A nanofabricated regular array of coupled gold nano-pillars is employed to detect local indices of refraction of different liquids using a shift of an antisymmetric plasmon resonance peak observed in the reflection spectra. The peak spectral position is found to be a unique function of the local refractive index for a wide range of indices. We discuss possible applications of the fabricated nanostructured arrays in bio and chemical sensors.
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