META 2021, META'12

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Plasmonic lenses and metasurfaces
ALEXANDER V KILDISHEV, Satoshi Ishii, Xingjie Ni, Naresh K Emani, Vladimir P Drachev, Alexandra Boltasseva, Vladimir M Shalaev

Last modified: 2012-01-13

Abstract


We review our recent progress in developing various types of planar nanoslit lenses, milled in metal films. We show the LC-tunable plasmonic slit lenses, which could be used as tunable elements of diffractive optical devices. Then, combining a loss-compensated hyperbolic metamaterial slab with the diffraction pattern produced by a double-slit gold mask, we show with our numerical simulations that the light confinement peak, which approaches ~1/17th of a free-space wavelength of 716 nm, can be obtained, and present the experimental demonstration of the subwavelength diffraction pattern, hence, confirming the predictions of our numerical modeling. Finally, we experimentally demonstrate even more extreme control over the phase of transmitted or reflected light using a 2D array of optical nanoantennas, achieving both negative refraction and reflection in the near-IR range.

Keywords


metamaterials; plasmonics; nanophotonics