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Investigation and Modification of Coupling of Photonic Crystal Defects |
| LIN Xu-Sheng;CHEN Xiong-Wen;LAN Sheng |
| Department of Physics, Shantou University, Shantou 515063 |
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| Cite this article: |
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LIN Xu-Sheng, CHEN Xiong-Wen, LAN Sheng 2005 Chin. Phys. Lett. 22 1698-1701 |
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Abstract We investigate the coupling of photonic crystal (PC) defects by using coupled-mode theory. The PC molecules formed by the coupling of two identical PC atoms are the focus of our study. It is revealed that the flatness of the transmission spectra of the PC molecules is determined uniquely by the phase shift of the travelling wave between the two coupled PC atoms. By properly adjusting the distance between the two constitutional PC atoms, we are able to modify the transmission spectrum of the resulting PC molecule. Theoretical analyses based on the coupled-mode theory are in good agreement with the simulation results obtained by the transfer matrix method and the finite-difference time-domain technique.
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| Keywords:
42.70.Qs
42.60.Da
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Published: 01 July 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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