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Title: 1 × 3 Beam splitter based on self-collimation effect in two-dimensional photonic crystals
Authors: Wan, Y.
Yun, M.
Xia, L.
Zhao, X. 
Keywords: Beam splitter
Integrated optical device
Photonic crystals
Issue Date: Feb-2011
Citation: Wan, Y., Yun, M., Xia, L., Zhao, X. (2011-02). 1 × 3 Beam splitter based on self-collimation effect in two-dimensional photonic crystals. Optik 122 (4) : 337-339. ScholarBank@NUS Repository.
Abstract: The analysis and simulation result of a 1 × 3 beam splitter in a two-dimensional square-lattice photonic crystal is presented in this paper, where the light is self-collimated as dictated by the self-collimation effect. The frequency and the direction of propagation of the self-collimated beam are obtained by the equal-frequency contours (EFCs) plot which is calculated by plane wave expansion method. Then a line defect is introduced by simultaneously varying the radii and the dielectric constant of the rods along the proper direction, the self-collimated beam propagation in such structure is simulated by the two-dimensional finite-difference time-domain (2D FDTD) method with perfectly matched layer absorbing boundary conditions. The simulation results show that the self-collimated beam can be split into three beams. With the same principle, a 1 × 7 beam splitter is realized by introducing different line defects along (X direction. Such devices can greatly enhance photonic crystals for usage in high-density optical integrated circuits. © 2010 Elsevier GmbH. All rights reserved.
Source Title: Optik
ISSN: 00304026
DOI: 10.1016/j.ijleo.2010.02.018
Appears in Collections:Staff Publications

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