Tunable band-stop plasmonic waveguide filter with symmetrical multiple-teeth-shaped structure

A nanometeric plasmonic filter with a symmetrical multiple-teeth-shaped structure is investigated theoretically and numerically. A tunable wide bandgap is achievable by adjusting the depth and number of teeth. This phenomenon can be attributed to the interference superposition of the reflected and t...

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Bibliographic Details
Published in:Optics letters 2016-03, Vol.41 (6), p.1233-1236
Main Authors: Wang, Hongqing, Yang, Junbo, Zhang, Jingjing, Huang, Jie, Wu, Wenjun, Chen, Dingbo, Xiao, Gongli
Format: Article
Language:English
Subjects:
Circuits
Coupling
Energy gaps (solid state)
Light
Nanostructure
Optical Devices
Optical Phenomena
Plasmonics
Plasmons
Teeth
Waveguide filters
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Summary:A nanometeric plasmonic filter with a symmetrical multiple-teeth-shaped structure is investigated theoretically and numerically. A tunable wide bandgap is achievable by adjusting the depth and number of teeth. This phenomenon can be attributed to the interference superposition of the reflected and transmitted waves from each tooth. Moreover, the effects of varying the number of identical teeth are also discussed. It is found that the bandgap width increases continuously with the increasing number of teeth. The finite difference time domain method is used to simulate and compute the coupling of surface plasmon polariton waves with different structures in this Letter. The plasmonic waveguide filter that we propose here may have meaningful applications in ultra-fine spectrum analysis and high-density nanoplasmonic integration circuits.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.001233