, Volume 5, Issue 4, pp 417–422 | Cite as

Plasmonic Waveguide Filters Based on Tunneling and Cavity Effects

  • Peng-Hsiao Lee
  • Yung-Chiang LanEmail author


This work presents a bandstop plasmonic filter that comprises a metal–insulator–metal (MIM) waveguide and a few pairs of strip cavities that are embedded in the metal. The strip cavity acts as both a near-field antenna and an MIM resonator. The central frequency and the bandwidth of the forbidden band are inversely related to the cavity length and the cavity-to-waveguide distance, respectively. These results correlate with the predictions of the ring resonator model but only under the resonant condition that double the effective length of cavity is an integer multiple of the guiding wavelength in the cavity.


Plasmonic filter Strip cavity Metal–insulator–metal 



This work was supported by the National Science Council of the Republic of China under contract numbers NSC98-2112-M-006-005-MY3 and NSC99-2120-M-002-012. The National Center for High-Performance Computing of Taiwan and the Computer and the Network Center of National Cheng Kung University are also acknowledged for uses of high-performance computing facilities.


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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Institute of Electro-Optical Science and EngineeringNational Cheng Kung UniversityTainanRepublic of China

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