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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 6, Iss. 10 — Oct. 1, 2008
  • pp: 709–712

A compact T-branch beam splitter based on anomalous reflection in two-dimensional photonic crystals

Yifeng Shen, Jian Sun, Xiaopeng Shen, Juan Wang, Lulu Sun, Kui Han, and Guozhong Wang  »View Author Affiliations

Chinese Optics Letters, Vol. 6, Issue 10, pp. 709-712 (2008)

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We project a compact T-branch beam splitter with a micron scale using a two-dimensional (2D) photonic crystal (PC). For TE polarization, one light beam can be split into two sub-beams along opposite directions. The propagating directions of the two splitting beams remain unchanged when the incident angle varies in a certain range. Coupled-mode theory is used to analyze the truncating interface structure in order to investigate the energy loss of the splitter. Simulation results and theoretical analysis show that choosing an appropriate location of the truncating interface (PC-air interface) is very important for obtaining high efficiency due to the effect of defect modes. The most advantage of this kind of beam splitter is being fabricated and integrated easily.

© 2008 Chinese Optics Letters

OCIS Codes
(120.1680) Instrumentation, measurement, and metrology : Collimation
(230.1360) Optical devices : Beam splitters

Yifeng Shen, Jian Sun, Xiaopeng Shen, Juan Wang, Lulu Sun, Kui Han, and Guozhong Wang, "A compact T-branch beam splitter based on anomalous reflection in two-dimensional photonic crystals," Chin. Opt. Lett. 6, 709-712 (2008)

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