Tunable band-stop plasmonic waveguide filter with symmetrical multiple-teeth-shaped structure
2016; Optica Publishing Group; Volume: 41; Issue: 6 Linguagem: Inglês
10.1364/ol.41.001233
ISSN1539-4794
AutoresHongqing Wang, Junbo Yang, Jingjing Zhang, Jie Huang, Wenjun Wu, Dingbo Chen, Gongli Xiao,
Tópico(s)Photonic Crystals and Applications
ResumoA 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.
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