Hidden progress: broadband plasmonic invisibility
arXiv:1003.5476 · doi:10.1364/OE.18.015757
Abstract
The key challenge in current research into electromagnetic cloaking is to achieve invisibility over an extended bandwidth. There has been significant progress towards this using the idea of cloaking by sweeping under the carpet of Li and Pendry, with dielectric structures superposed on a mirror. Here, we show that we can harness surface plasmon polaritons at a metal surface structured with a dielectric material to obtain a unique control of their propagation. We exploit this to control plasmonic coupling and demonstrate both theoretically and experimentally cloaking over an unprecedented bandwidth (650-900 nm). Our non-resonant plasmonic metamaterial allows a curved reflector to mimic a flat mirror. Our theoretical predictions are validated by experiments mapping the surface light intensity at the wavelength 800 nm.
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- Moulding the flow of surface plasmons using conformal and quasiconformal mapping
- Controlling surface plasmon polaritons in transformed coordinates
- Electromagnetic analysis of arbitrarily shaped pinched carpets
- Curved trajectories on transformed metal surfaces: Luneburg lens, beam-splitter, invisibility carpet and black hole for surface plasmon polaritons
- General Properties of Two-dimensional Conformal Transformation in Electrostatics
- On solutions of Maxwell's equations with dipole sources over a thin conducting film
- Cloaking and anamorphism for light and mass diffusion
- Photonic crystal carpet: Manipulating wave fronts in the near field at 1550 nm