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Surface plasmon polaritons (SPPs) enable extreme device miniaturization via deeply sub-wavelength electromagnetic field confinements [1]. Conventional coupling techniques typically require phase matching or mode-matching, which is challenging at sub-wavelength dimensions. Here, we introduce and experimentally demonstrate a novel near-field hybrid fiber [2, 3] nanoprobe for the efficient excitation...
In my presentation I will review our recent results on plasmonics inside optical fiber with the special focus on plasmonic hybridization, supermode excitation and a novel fiber-integrated near field probe.
Localized surface plasmon resonances (LSPRs) are collective oscillations of the electron ensemble in a metallic nanostructure and can be excited by electromagnetic (EM) waves. Their characteristics are determined by the morphology of the nanostructure and the permittivities of the metal and the surrounding dielectric. An intriguing feature of LSPRs is the local EM field enhancement, resulting in strong...
The near-field profile of a quadrupolar plasmon mode, guided on a gold nanowire incorporated in a PCF, is imaged using SNOM. The mode is excited by phase-matched coupling from an adjacent glass core.
High quality metallic wires (diameters down to 260nm) are fabricated using direct fiber drawing from a gold-filled cane. Measurements show coupling of light from the glass-core to plasmonic resonances on the wire, causing dips in the transmission at specific wavelengths.
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