Tunable omnidirectional reflection bands and defect modes of a one-dimensional photonic band gap structure with liquid crystals
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- Young-Ki Ha
- Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea
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- Y.-C. Yang
- Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea
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- J.-E. Kim
- Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea
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- H. Y. Park
- Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea
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- C.-S. Kee
- Department of Molecular Science and Technology, Ajou University, Suwon 442-749, Korea
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- H. Lim
- Department of Molecular Science and Technology, Ajou University, Suwon 442-749, Korea
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- J.-C. Lee
- Department of Information and Communications, Kwangju Institute of Science and Technology, Kwangju 500-712, Korea
説明
<jats:p>We have theoretically investigated the tunability of the omnidirectional reflection band (ORB) of a one-dimensional (1D) photonic crystal (PC) consisting of alternating isotropic dielectric and nematic liquid crystal layers by an external electric field. The width of the ORB becomes wide as the external voltage increases, but the center frequency is changed little. The frequency of the defect mode created by inserting a layer of liquid crystals into a 1D dielectric PC is also found to be tunable by the application of external voltage. These properties can be applied to tunable optical filters or optical switches.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 79 (1), 15-17, 2001-07-02
AIP Publishing