Journal
OPTIK
Volume 174, Issue -, Pages 282-288Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2018.08.071
Keywords
Graphene; Tunable; Multichannel; FDTD; Filter
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11704326]
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A tunable multichannel mid-infrared filter based on monolayer graphene is proposed and investigated. The optical transmission spectra are numerically simulated by the method of finite difference time-domain (FDTD). The numerical results denote that the filtering properties can be tuned by the chemical potentials of graphene, the depth of the air trench, the temperature, and the quasi-period number of the structure. The numerical results are discussed by deducing the effective refractive index of surface plasmon polaritons (SPPs) propagating on the multilayered structure of air/graphene/dielectric and air/graphene/air/dielectric. This work can provide a method to design tunable multichannel filter with a single layer of graphene. Due to its tunability and miniaturization, the proposed structure can be found application in high speed integrated photonic circuit.
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