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Ellipto-Hyperbolic nano-antennas are studied theoretically and experimentally. Self-modes are derived in closed-form, and very high directivity is implied. Ellipto-hyperbolic antennas are under extensive study and only few results are shown here.
Broadband plasmonic metamaterials for the near infrared regime are presented, based on multiple small antennas in a unit cell. Rules for building such metamaterials and overcoming the undesired coherent coupling are presented.
Ordered arrays of Au nanodisks, extending into the active layer of organic photovoltaic device exhibit enhanced external quantum efficiency, stemming from resonances of plasmon and nanopatch antennas. Design rules were verified experimentally.
Arrays of plasmonic nano-antennas were fabricated on InGaAs/InP multi quantum well structure. Photo-luminescence enhancement of ×9 was measured in correspondence with nano-antennas resonance, attributed to ×25 increase in radiative recombination rate.
New families of plasmonic particles with on-demand resonance design are obtained by applying ‘Evolutionary algorithm’. Other particles were designed to exhibit multipole resonance degeneracy, e.g. collocated dipole-quadrupole, which may be applied as superfilters and superabsorbers.
Efficient coupling and power concentration of radially-polarized light in conical plasmonic needle is presented. Needle length dependent resonances are calculated. Radial plasmonic DBR with needle as defect was fabricated for NSOM and nonlinear conversion experiments.
Highly asymmetrical plasmonic waveguides exhibit guiding in dimensions below the expected cutoff. A new family of discrete guided modes of asymmetrical waveguides with losses is found, which assists in nano plasmonic guiding.
Coupling effects between two types of surface-plasmon-polariton waveguides in the subwavelength regime (stripes and slots) are measured experimentally at ?? = 1.55??m using near field microscopy and validated by finite element modal calculations.
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