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Focusing light beyond the diffraction limit is of great interest in photonics. Metallic nano-tips offer the ability to concentrate light in nanometric volumes on femtosecond timescales, facilitating applications in tip-enhanced Raman scattering, optical near field microscopy or ultrafast photoemission. Here, we report the spatial mapping of surface plasmon polaritons on conical gold nano-tips by electron...
We present a bottom-up approach to fabricate single active optical antennas as well as antenna arrays consisting of semiconductor quantum dots and plasmonic nanostructures. It is based on a two-step lithographic process in combination with chemical functionalization of the substrate and allows for the deposition of quantum dots with high accuracy relative to arbitrary metal nanostructures. Examples...
We present an Electron Energy Loss Spectroscopy (EELS) study in a Scanning Transmission Electron Microscope (STEM) of individual Split-Ring Resonator (SRR). We show the possibility to map each plasmonic modes with a nanometric spatial resolution in the Near IR to UV spectral range.
We present spectrally resolved near-field transmission experiments on one-dimensional metallic photonic crystal slabs. The observed features depend on polarization and periodicity and are attributed to the excitation of waveguide modes or waveguide-plasmon polaritons
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