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Design of tunable terahertz photonic crystal narrow-band filters

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The coupling between the line defect and point defect in a two-dimensional photonic crystal is studied by using plane wave expansion method and finite difference time domain method. Based on the analysis, we propose a novel tunable terahertz narrow-band filter. Simulation results on the defect modes and output spectra show that the photonic crystal that consists of two line defects and one point defect can act as a tunable filter with narrow bandwidth of 0.02 THz under the control of an external electric field.

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Correspondence to Hui Zhang  (张会).

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This work has been supported by the National Basic Research Program of China (Grant No.2007CB310403), the National Natural Science Foundation of China (Grant No. 60772105), and Key Program of the Applied Basic Research of Tianjin(Grant No. 07JCZDJC05500)

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Zhang, H., Bai, Jj., Guo, P. et al. Design of tunable terahertz photonic crystal narrow-band filters. Optoelectron. Lett. 5, 169–172 (2009).

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