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Metallic photonic crystals for terahertz tunable filters

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Abstract

We have investigated the photonic band gap and transmission properties of metallic photonic crystals (PCs) filled with liquid crystal (LC) in the terahertz region by using the finite element method and the finitedifference time-domain method. The calculations on the LC-filled metallic PC and metallic PC waveguide demonstrated that they can realize low-loss broadband terahertz tunable filters, which have a tunable range of about 110 GHz and extinction ratio larger than 35 dB. Moreover, the 3 dB bandwidths of the filters keep constant. The designed filters based on the metallic PC can greatly improve the performances in terms of loss, bandwidth and tunable region compared to those based on the LC-filled dielectric PC.

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Authors and Affiliations

  1. Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Science and Technology, Ministry of Education, Tianjin, 300071, China

    Fei Fan, ShengJiang Chang & Yu Hou

Authors
  1. Fei Fan
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  2. ShengJiang Chang
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  3. Yu Hou
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Correspondence to ShengJiang Chang.

Additional information

FAN Fei was born in 1986. He received his BS degree in opto-electronic technology and science in 2009 from Tianjin University, Tianjin. Currently, he is a Ph.D. graduate student of optical engineering at Nankai University. His research interests include terahertz technology, photonic crystal and metamaterials.

CHANG ShengJiang received his Ph.D. degrees in optical Engineering in 1996 from the Nankai University, Tianjin, Currently, He is working as a professor at Institute of Modern Optics, Nankai University. His research interests include terahertz technology and application, digital image processing and pattern recognition. He has authored and co-authored more than 100 academic papers in the field of neural networks and terahertz technique.

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Fan, F., Chang, S. & Hou, Y. Metallic photonic crystals for terahertz tunable filters. Sci. China Inf. Sci. 55, 72–78 (2012). https://doi.org/10.1007/s11432-011-4485-3

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  • DOI: https://doi.org/10.1007/s11432-011-4485-3

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