A Defect Effect to Light Transmission through Acute Bending Coupled Cavity Waveguide in a Two-Dimensional Photonic Crystal |
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| Authors: | HUANG Yin LU Yan-Wu |
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| Affiliation: | Department of Physics, Beijing Jiaotong University, Beijing 100044 |
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| Abstract: | Light propagation through a coupled-defect waveguide with a 63.5° bend in a two-dimensional (2D) photonic crystal is investigated. The waveguide modes are non-degenerate monopole state and dipole defect state of a square lattice for two different branches. To increase the transmission in the bending waveguide, we propose a method to rotate the localized state by introducing a new type defect with a sheared square rod into coupled cavity. The higher coupling efficiency and transmission in the bending waveguide are obtained with proper shear shift. |
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| Keywords: | 78.20.Ci 42.70.Qs 42.60.Da |
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