26 September 2013 Nonlinear phenomena from a PIC-attached gold tip using a plasmonic-whispering gallery mode hybrid system
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Abstract
We proposed a plasmonic-WGM hybrid system composed of a tapered-fiber-coupled microsphere resonator and a PICattached gold tip to focus the incident light into a nanoscale domain (~728.8 nm2) with high coupling efficiency of ~80.3 % and the Q factor of ~1.9×106. In order to experimentally verify the strong interaction between light and matter owing to efficient excitation of localized surface plasmon at the gold-coated tip, we demonstrated to observe two-photon excited fluorescence from PIC dye molecules attached on the gold-coated tip even under a weak CW excitation condition via a tapered-fiber-coupled microsphere resonator.
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Fang Ren, Hideaki Takashima, Yoshito Tanaka, Hideki Fujiwara, Keiji Sasaki, "Nonlinear phenomena from a PIC-attached gold tip using a plasmonic-whispering gallery mode hybrid system", Proc. SPIE 8816, Nanoengineering: Fabrication, Properties, Optics, and Devices X, 881612 (26 September 2013); doi: 10.1117/12.2022626; https://doi.org/10.1117/12.2022626
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