Chin. Phys. Lett.  2009, Vol. 26 Issue (4): 047805    DOI: 10.1088/0256-307X/26/4/047805
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
A Defect Effect to Light Transmission through Acute Bending Coupled Cavity Waveguide in a Two-Dimensional Photonic Crystal
HUANG Yin, LU Yan-Wu
Department of Physics, Beijing Jiaotong University, Beijing 100044
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HUANG Yin, LU Yan-Wu 2009 Chin. Phys. Lett. 26 047805
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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.
Keywords: 78.20.Ci      42.70.Qs      42.60.Da     
Received: 30 November 2008      Published: 25 March 2009
PACS:  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  
  42.70.Qs (Photonic bandgap materials)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/4/047805       OR      https://cpl.iphy.ac.cn/Y2009/V26/I4/047805
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HUANG Yin
LU Yan-Wu
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