| Original Articles |
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Independent Modulation of Omnidirectional Defect Modes in Single-Negative Materials Photonic Crystal with Multiple Defects |
| WANG Qiong;YAN Chang-Chun;ZHANG Ling-Ling;CUI Yi-Ping |
| Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 |
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| Cite this article: |
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WANG Qiong, YAN Chang-Chun, ZHANG Ling-Ling et al 2008 Chin. Phys. Lett. 25 1313-1316 |
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Abstract Single-negative materials based on photonic crystal with multiple defect layers are designed and the free modulation of defect modes is studied. The results show that the multi-defect structure can avoid the interference between the defect states. Therefore, the designed double defect modes in the zero effective-phase gap can be adjusted independently by changing
the thickness of different defect layers. In addition, the two tunable defect modes have the omnidirectional characteristics. This multi-defect structure with above-mentioned two advantages has potential applications in modern optical devices such as tunable omnidirectional filters.
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| Keywords:
42.70.Qs
41.20.Jb
78.20.Ci
42.25.Bs
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Received: 10 December 2007
Published: 31 March 2008
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| PACS: |
42.70.Qs
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(Photonic bandgap materials)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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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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42.25.Bs
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(Wave propagation, transmission and absorption)
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