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| Polarization-independent self-collimation bends and beam splitters in 32,4,3,4 Archimedean photonic crystals |
| Zhong Qi, Han Kui, Shen Xiao-Peng, Tong Xing, Wu Qiong-Hua, Li Ming-Xue, Wu Yu-Xi |
| College of Science, China University of Mining and Technology, Xuzhou 221116, China |
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Abstract By using equi-frequency contour analysis and finite-difference time-domain simulation, self-collimation for TE- and TM-polarizations are achieved at the same frequency in two dimensional 32,4,3,4 Archimedean photonic crystals. The bends and beam splitters are realized by truncating an air block in the photonic crystals. It is observed that the line defect can produce a tunable one-to-two beam splitter by controlling the width of the air block. A bend and a 1 ∶1 beam splitter for the TE- and TM- polarization are designed respectively, both have high efficiency. This study proposes a new design method for optical devices based on photonic crystals.
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Received: 17 July 2009
Published: 15 October 2010
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2010, Vol. 59 
