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Improved Y-splitter photonic crystal waveguides in terahertz regime

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Abstract

Using the finite-difference time-domain method, the electromagnetic field distribution of terahertz waves in different photonic crystals Y-splitters were simulated. By continuous wave excitation of the guided mode, the simulation results show that those different Y-splitters can divide the power in an input wave guide equally between two output waveguides. By pulse excitation of a Gaussian envelope in time, the different Y-splitters have large different amplitude-frequency characteristics. The improved Y-splitter with a rod in the junction and without rods in the corners has widest −3-dB bandwidth 0.224 THz, and the amplitude reaches 0.616. The improved Y-splitter has better performance than other Y-splitters. These results provide a useful guide and a theoretical basis for the developments of terahertz functional components.

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Authors and Affiliations

  1. State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R. China

    S. Li, H.-W. Zhang, Q.-Y. Wen, F.-M. Bai, W.-W. Ling, Y.-s. Xie & Y.-X. Li

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  1. S. Li
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  2. H.-W. Zhang
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  3. Q.-Y. Wen
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  4. F.-M. Bai
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  5. W.-W. Ling
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  6. Y.-s. Xie
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  7. Y.-X. Li
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Correspondence to H.-W. Zhang.

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Li, S., Zhang, HW., Wen, QY. et al. Improved Y-splitter photonic crystal waveguides in terahertz regime. Appl. Phys. B 99, 709–716 (2010). https://doi.org/10.1007/s00340-010-3928-7

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  • DOI: https://doi.org/10.1007/s00340-010-3928-7

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