Abstract
A plasmonic bus waveguide with a side-coupled T-shaped (TS) or a reverse T-shaped (RTS) resonator
consisting of a parallel and a perpendicular cavities is proposed. The compact configuration could serve as a
wavelength demultiplexing device as a forbidden band is achieved based on the symmetric distribution of resonators. By
shifting one cavity away from the center of the resonator, the system exhibits electromagnetically induced
transparency (EIT) like transmission at the wavelength of the former forbidden band. The electromagnetic responses of
the structure could be handled with certain flexibility by changing the asymmetric behavior of the TS or RTS
resonator. Similar characteristics for two proposed structures could be obtained except for the center wavelength that
is determined by the two cavities in the RTS resonator or by the cavity parallel to the bus waveguide in the TS
resonator.
© 2014 IEEE
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