| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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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| Cite this article: |
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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.
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| Keywords:
78.20.Ci
42.70.Qs
42.60.Da
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Received: 30 November 2008
Published: 25 March 2009
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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42.70.Qs
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(Photonic bandgap materials)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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