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In this paper, a novel nanometeric plasmonic narrow-band filter consisting of a metal–insulator–metal waveguide and a cavity embedded in the metal is proposed and numerically demonstrated by using the finite difference time domain method. The physical mechanism of the filter is elucidated. The results reveal that a narrow-band spectrum notch-filtering function can be realized with the proposed structure...
Plasmonics involves manipulation of surface plasmons (SPs), which are collective oscillations of surface electrons in metal interacting with an electromagnetic field. Plasmonic structures provide compact and integrated optical processing, where planar metallic structures can be used to manipulate the amplitude and phase of SPs in two dimensions at the subwavelength level. By integrating plasmonic...
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