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Plasmonic nanostructures can help to greatly enhance light-matter interaction that in involved in many energy transfer and transformation processes [1, 2]. Here we discuss design and fabrication of symmetry-broken plasmonic spiral conical tips that enable efficient transport and focusing of optical signal and energy input from optical fiber via surface plasmon polariton (SPP) [3, 4]. Metallic probes...
We discuss our recent experimental and theoretical works on the efficient generation of prominent and robust Fano resonances in 3D metamaterials (MMs). The 3D MMs are formed by integrating vertical U-shape SRRs or vertical rectangular plates along a planar metallic hole array with extraordinary optical transmission (EOT) built by means of homemade focused ion-beam (FIB) lithography [1, 2]. In such...
Plasmonic nanostructures have offered a wide variety of opportunities to manipulate the properties of light and light-matter interactions. In this talk we discuss a novel methodology called surface wave holography, which allows for direct determination of the morphology of plasmonic nanostructrues perforated on a metal thin film for wavefront control and shaping of light without the need of complicated...
Metal nanocrystal has attracted extensive interest due to its nanoscale confinement of electromagnetic field near the metal surface far beyond the diffraction limit. Fluorescence enhancement is one of the promising applications based on the interaction between such confined near field and fluorescence molecules. Here we present an interesting method by utilizing double surface plasmon resonance (SPR)...
We propose a scheme to enhance near-UV band absorption of a rutile TiO2 nanoparticle by embedding TiO2 nanoparticle into designed Al three-dimensional (3D) nanostructures. The 3D finite-difference time-domain (FDTD) method was employed to calculate the absorption spectrum of pure rutile TiO2 nanoparticle and that of TiO2 mixed with designed Al nanostructures. Our theoretical study has shown that pure...
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