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Omnidirectional Gaps of One-Dimensional Photonic Crystals Containing Single-Negative Materials |
| JIANG Hai-Tao;CHEN Hong;LI Hong-Qiang;ZHANG Ye-Wen |
| Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092 |
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| Cite this article: |
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JIANG Hai-Tao, CHEN Hong, LI Hong-Qiang et al 2005 Chin. Phys. Lett. 22 884-886 |
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Abstract We show that a one-dimensional photonic crystal containing two kinds of single-negative materials can possess an omnidirectional gap whose edges are insensitive to incident angle and polarization, owing to the unusual field configuration in the structure. In contrast to an omnidirectional gap based on a photonic gap that corresponds to zero averaged refractive index, it can be made very wide by varying the ratio of the thicknesses of two media. Moreover, it is independent of polarization under special parameters. These properties may provide a mechanism to design a broadband omnidirectional reflector with fixed bandwidth.
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| Keywords:
42.70.Qs
78.20.Ci
41.20.Jb
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Published: 01 April 2005
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| PACS: |
42.70.Qs
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(Photonic bandgap materials)
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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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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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