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Two-Dimensional Photonic Band-Gap Defect Modes with Deformed Lattice |
| CAI Xiang-Hua;ZHENG Wan-Hua;MA Xiao-Tao;REN Gang;XIA Jian-Bai |
| Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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| Cite this article: |
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CAI Xiang-Hua, ZHENG Wan-Hua, MA Xiao-Tao et al 2005 Chin. Phys. Lett. 22 2290-2293 |
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Abstract A numerical study of the defect modes in two-dimensional photonic crystals with deformed triangular lattice is presented by using the supercell method and the finite-difference time-domain method. We find the stretch or shrink of the lattice can bring the change not only on the frequencies of the defect modes but also on their magnetic field distributions. We obtain the separation of the doubly degenerate dipole modes with the change of the lattice and find that both the stretch and the shrink of the lattice can make the dipole modes separate large enough to realize the single-mode emission. These results may be advantageous to the manufacture of photonic crystal lasers and provide a new way to realize the single-mode operation in photonic crystal lasers.
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| Keywords:
42.70.Qs
42.60.Da
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Published: 01 September 2005
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| PACS: |
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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