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Bragg gratings, because of their favored surface plasmon coupling characteristic, are widely applied in nano-optics. We propose a periodic staggered Bragg gratings structure as a refractive index sensor by the finite element method. The optimized extraordinary optical transmission based on staggered gratings can excite surface plasmon resonance for much larger wavelength. The refractive index can...
In this paper, we propose a novel three dimensional metamaterial design with eight-fold rotational symmetry that shows a polarization-insensitive, wide-angle and broadband perfect absorption in the microwave band. By simulation, the polarization-insensitive absorption is over 90% between 26.9GHz to 32.9GHz, and the broadband absorption remains a good absorption performance to a wide incident angles...
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