Publication Date:
2018-02-07
Description:
A novel nanoscale plasmonic resonator system based on metal-dielectric-metal plasmonic waveguide coupled with left- or right-handed sectorial-ring stub resonator is proposed and investigated. The two-dimensional simulation demonstrates that a transmission spectrum with two dips and one peak is achieved in the novel system, whose left- or right-handed resonator is the same effect. The transmission spectrum can be highly tuned by adjusting the refractive index $(n)$ of the dielectric, or the central angle ( $theta$ ) or the outer radius $(R)$ and inner radius $(r)$ of the stub (namely the width ( ${w}_{mathrm{ s}}$ ) or center arc length ( $l_{mathrm{ C}}$ ) of the stub) when the $n$ , ${w}_{mathrm{ s}}$ , and $l_{mathrm{ C}}$ are unfixed, and also can be highly controlled by fixing the $n$ , ${w}_{mathrm{ s}}$ , and $l_{mathrm{ C}}$ with different $theta$ , $R$ , and $r$ . The transmission perform- nce is explained by the resonance condition, which agrees well with the numerical simulation or theoretical calculation. The proposed structure realizes asymmetrical, multiple, and tunable or controllable stub, which can become a novel plasmonic nanofilter or nanosensor. This letter provides a promising application for nanoscale optical devices and integrated optics devices.
Print ISSN:
1041-1135
Electronic ISSN:
1941-0174
Topics:
Electrical Engineering, Measurement and Control Technology
