The modulation on the optical responses of one-dimensional photonic crystals based on the ordered porous TiO2 films |
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Authors: | Jian Wang Cheng-Wei Wang |
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Institution: | Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China |
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Abstract: | The optical responses of the 1D porous TiO2/SiO2 complete and defect PCs formed with the ordered porous TiO2 film prepared by using the spin coating and annealing techniques have been systematically studied with FDTD simulation technique. The whole photonic band gap can be easily linearly modulated by the structure parameters, such as thickness, porosity, the filled materials, and so on. The defect layer thickness and porosity only modulate the defect state, and have little effects on the whole PBG. It is more important that the 1D porous TiO2/SiO2 complete and defect PCs have no omnidirectional photonic band gap and defect state. |
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Keywords: | One-dimensional complete and defect photonic crystal Defect state Ordered porous TiO2 films The finite-different time-domain (FDTD) |
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