Omni-directional mirror for visible light based on one-dimensional photonic crystal |
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| Authors: | Huihuan Guan Peide Han Yanqing Yang Yuping Li Xue Zhang and Wenting Zhang |
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| Institution: | 1,2 1 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China 2 Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024, China |
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| Abstract: | The omni-directional reflection characteristics of one-dimensional photonic crystals composed of Ta 2 O 5 /MgF 2 multi-quantum well (MQW) are studied using the transfer matrix method. An omni-directional reflector consisting of three and four Ta 2 O 5 /MgF 2 MQWs is investigated. Results show that the photonic band gap of the photonic crystal composed of three and four Ta 2 O 5 /MgF 2 MQWs, which are within the wavelength ranges of 402–712 and 412–1,023 nm, respectively, could cover the entire visible region. The relationship among the width of the band gap, its location, reflectivity rate, and incident angle of the incident light is analyzed. The optimal structural parameters of the MQW of the omni-directional reflector in the visible region are also calculated. The calculations provide a guide for the design of omni-directional reflection devices in the visible region. |
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