Tuning plasmonic cloaks with an external magnetic field

Abstract

We propose a mechanism to actively tune the operation of plasmonic cloaks with an external magnetic field by investigating electromagnetic scattering by a dielectric cylinder coated with a magneto-optical shell. In the long wavelength limit we show that the presence of an external magnetic field may drastically reduce the scattering cross-section at all observation angles. We demonstrate that the application of external magnetic fields can modify the operation wavelength without the need of changing material and/or geometrical parameters. We also show that applied magnetic fields can reversibly switch on and off the cloak operation. These results, which could be achieved for existing magneto-optical materials, are shown to be robust to material losses, so that they may pave the way for developing actively tunable, versatile plasmonic cloaks.

5 pages and 4 figures Figure 4 has been remade

References in corpus (5)

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Cited by in corpus (9)

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• Molding the flow of light with a magnetic field: plasmonic cloaking and directional scattering
• Optical tristability and ultrafast Fano switching in nonlinear magneto-plasmonic nanoparticles
• Purcell effect at metal-insulator transitions
• Cloaking Resonant Scatterers and Tuning Electron Flow in Graphene
• Controlling optical memory effects in disordered media with coated metamaterials