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We report the experimental implementation of a bulk metamaterial with an all-angle left-handed response in the ultraviolet. Using this metamaterial, we fabricate an optically switchable Veselago flat lens capable of imaging arbitrary two-dimensional objects beyond the near field.
Ohmic losses severely limit the performance of metamaterials. High-index semiconductors offer an attractive alternative. We review several meta-surfaces based on silicon and silicon carbide enabling infrared applications such as polarization manipulation and thermal emission.
We present an analytical approach that adequately describes the nonlocal optical response for plasmonic nanowire metamaterials. The technique provides an insight into the origin of the additional wave and allows implementation additional boundary conditions.
We present an ultrafast dynamics of THz graphene-metamaterial hybrid devices, where the refractive index and the conductivity are largely modulated by electrical and optical methods. Unprecedentedly large modulation of refractive index and the pump-induced negative conductivity are investigated by an ultrafast time-resolved optical-pump THz-probe spectroscopy with varying gate voltage.
We demonstrate truly deep sub-wavelength nanoscale metamaterial optical nanocavities with anomalous scaling laws, by incorporating indefinite metamaterials with hyperbolic dispersion. Cavities with sizes down to ∼ λ/20 and high effective refractive index of 17.4 are realized.
We experimentally investigate the nonlinear propagation in thick optical negative index materials. The ratio of the forward to backward four wave mixing generation was shown to follow the prediction of the phase-matching relations.
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