Abstract
Dynamically tunable multichannel filter based on plasmon-induced transparencies (PITs) is proposed in a plasmonic waveguide side-coupled to slot and rectangle resonators system at optical communication range. The slot and rectangle resonators in this system can be regarded as radiative or dark resonators as same as the radiative or dark elements in the metamaterial structure with the help of the evanescent coupling. The multiple PIT responses which can enable the realization of nanoscale filter with four channels are originated from the direct near-field coupling and indirect phase couple through a plasmonic waveguide simultaneously. Moreover, the magnitudes and bandwidths of the filter can be efficiently tuned by controlling of the geometric parameters such as the coupling distances and the pump light-induced refractive index change of the Kerr material which is embedded into the metal-dielectric-metal waveguide between the radiative resonators.
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This work is supported by the National Natural Science Foundation of China (Grant No. 61376055 and 61006045), and the National Basic Research Program of China (Grant No. 2010CB923204).
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Han, X., Wang, T., Li, X. et al. Dynamically Tunable by Kerr Effect Multichannel Filter Based on Plasmon Induced Transparencies at Optical Communication Range. Plasmonics 11, 729–733 (2016). https://doi.org/10.1007/s11468-015-0102-4
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DOI: https://doi.org/10.1007/s11468-015-0102-4