The Investigation Of Design And Fabrication Of Multiple Photonic Quasicrystal

Since the concept of photonic crystals was proposed in 1987, the application prospect of this kind of "optical semiconductor" materials has received worldwide attention of scientists, and raised the research upsurge, in 1999 it has been selected as one of the ten major progress by "Science" magazine. The performance of the photonic crystal material is excellent, so it can be used for straight waveguide, bend waveguide, filter, photonic crystal fiber.Found of all kinds of quasicrystal structure on the century 80’s in the alloy structure, it caught the researchers view once again. The quasicrystal structure does not have the translational periodicity of the periodic photonic crystal structure, it only has the rotation symmetry. Because of this advantage, it not only has the same characteristics of periodic photonic crystal materials, and has its inherent superiority. For example, the threshold of band gap appearance refractive index is lower, without introducing defects can appear defect state. These makes it can be good candidate for photonic band gap materials, negative refractive index material, the prospect of its application is unique. The main work accomplished are as follows:Study on the band gap properties of periodic photonic crystal structure. Comparing the band-gap characteristics of two kinds of triangular lattice structure, analyzes the influence of the incident angle on the band gap characteristics.Study on the property of 12-fold quasicrystal structure. Constructs twelve fold quasicrystal structure, calculates the width of band gap with the change trend of the dielectric refractive index, filling factor parameter. The investigation of defect model based on the model, by introducing a line defect, point defect, designs micro cavity and waveguide structure with excellent properties, presents the optical field transmission diagram of these structures.Iinvestigation the band gap characteristics of 18-fold quasicrystal structure. Calculates the influence of main parameters on the width of band gap, and the band gap properties are compared to twelve fold structures.Fabrication of quasicrystal with single prism photolithography. Top-cut five angle prism interferometer system was prepared for obtaining10-fold quasicrystal structure, then observes the structure. In addition theoretically verifies the feasibility of using a simple prism to create multiple crystal structure through different sample rotation and multiple exposure method.