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Significant Enhancement of Unidirectional Transmission in Asymmetrically Confined Photonic Crystal Defect Pairs |
| CAI Xu-Hong1;LIN Xu-Sheng1;LAN Sheng2 |
| 1Department of Physics, Shantou University, Shantou 5150632Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006 |
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| Cite this article: |
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CAI Xu-Hong, LIN Xu-Sheng, LAN Sheng 2008 Chin. Phys. Lett. 25 2085-2088 |
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Abstract By carrying out the two ideas of asymmetrical confinement and asymmetrical response into the photonic crystal (PC) structures that contain two or more nonlinear defects, we find that significantly unidirectional transmission can be
achieved while the transmission for the positive launch direction maintains at large values. Our analyses are supported by the simulation results based on the finite-difference time-domain technique.
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| Keywords:
42.70.Qs
42.65.Pc
42.82.Gw
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Received: 15 February 2008
Published: 31 May 2008
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| PACS: |
42.70.Qs
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(Photonic bandgap materials)
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42.65.Pc
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(Optical bistability, multistability, and switching, including local field effects)
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42.82.Gw
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(Other integrated-optical elements and systems)
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