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Degeneracy and Split of Defect States in Photonic Crystals |
| HUANG Xiao-Qin;CUI Yi-Ping |
| Department of Electronic Engineering, Southeast University, Nanjing 210096
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| Cite this article: |
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HUANG Xiao-Qin, CUI Yi-Ping 2003 Chin. Phys. Lett. 20 1721-1724 |
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Abstract One-dimensional photonic crystals with two or more structural defects are studied. We observed an interesting characteristic of transmission band structure of photonic crystals with defects using the transmission-matrix-method simulation. The transmission states in the wide photonic band gap caused by defects reveal degeneracy and split in certain conditions. Every split state is contributed by coupling of all defects in a photonic crystal. Using the tight-binding method, we obtain an approximate analytic expression for the split frequency of photonic crystals with two structural defects.
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| Keywords:
41.20.Jb
42.55.Tv
42.70.Qs
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Published: 01 October 2003
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.55.Tv
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(Photonic crystal lasers and coherent effects)
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42.70.Qs
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(Photonic bandgap materials)
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