Fast and Low-Power All-Optical Tunable Fano Resonance in Plasmonic Microstructures

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Abstract

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A fast and low-power all-optical tunable Fano resonance in a plasmonic microstructure made of gold and polycrystalline LiNbO3 is realized by combining strong quantum confinement enhancing nonlinearity and near-resonant excitation enhancing nonlinearity. The operating pump intensity is reduced by four orders of magnitude, while a fast response time on the order of a hundred picoseconds and a large tunability are maintained.

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