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We experimentally demonstrate wave propagation in 2D nanophotonic epsilon-near-zero (ENZ) waveguides. We show an ENZ double-slit experiment, investigate ENZ diffraction and observe the disappearance of wavelength-scale obstacles close to the cut-off of the waveguide mode.
We experimentally demonstrate spectrally broad (λ0=1200–1800 nm) in-plane negative diffraction of SPPs in an array of plasmonic channel waveguides with negative mutual coupling resulting in negative refraction on the array's interface and refocusing in an adjacent metal layer.
We study defect and surface states in PT-symmetric optical mesh lattices. Such localized states can emerge in both the real and complex domain and can exhibit peculiar properties that are otherwise unattainable in Hermitian systems.
We study propagation dynamics in a new class of optical lattices which are bi-periodic and discrete in both coordinates. These mesh structures exhibit peculiar linear and nonlinear properties which are unattainable in traditional optical lattices.
Plasmonic gap waveguides allow for subwavelength integration of optical circuitry. A side effect is extraordinarily high field enhancement. Here we present experimental and numeric results, which indicate nonlinear switching in a directional coupler.
High confinement in plasmonic waveguides usually comes along with high loss. We present experiments on a new approach, which allows to tune adiabatically between high confinement and low loss waveguides, connected to optical Yagi-style antennas.
We experimentally demonstrate the excitation of plasmonic gap waveguides by nano antennas. The excitation is shown to be both spatially and spectrally dependent which can potentially be used for the selective excitation of plasmonic nanostructures.
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