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Research on Photonic Crystal Waveguide Slow Light Dynamic Control Characteristics

Author: ZhangNing
Tutor: ZhuNa
School: Jiangsu University
Course: Electromagnetic Field and Microwave Technology
Keywords: Photonic crystal Plane wave expansion method Slow light Dynamic control Photonic band gap limit
CLC: O734
Type: Master's thesis
Year: 2010
Downloads: 146
Quote: 0
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Abstract


With the continuous improvement of the transmission rate of the optical fiber communication network and the rapid development of electronic devices increasing speed bottleneck restricting the development of the optical network. The all-optical network is the direction of the development of the next generation network. But, the key components of the optical buffer yet practical ways. Therefore, the slow-light technology is one of the ways of development of optical buffer solution. Photonic crystal waveguide slow light technology compared to the traditional slow light technology has advantages: produce slow light at room temperature, do not require special materials, almost any frequency slow light and dynamic control of slow light speed. This paper around the main characteristics of the photonic crystal waveguide slow light photonic crystal band gap limit to start the study. The major work completed and the results are as follows: (1) design group velocity dispersion calculation method. Group velocity calculated by the group velocity dispersion of the method to calculate the photonic crystal defect mode. Compare defect mode frequency changes before and after the group velocity dispersion, the band gap of the photonic crystal defect mode frequency changes caused by the change of the group velocity dispersion. (2) to derive the law of slow light speed of light is determined by the frequency of the defect mode. By controlling the photonic crystal slow light two counter-examples: mobile photonic crystal line defect defects, dynamically adjusting the refractive index of the two media, neither of these two methods defect mode can slow the light speed of light changes. Slow light to arrive at the speed of light is determined by the frequency of the defect mode. (3) study the dynamic control process, found that the impact of slower light speed of light changes the speed factor. The partial derivatives of the time through mathematical gradually decompose slow light speed of light, from the theoretical and simulation analysis has been the impact factor. After exclude conflicting factors and slow optical design, there is obtained the final optimized design: media faster response speed, and a high level of the defect mode, and the photonic crystal structure is reasonable. (4) the electron tunneling effect encountered in the study compared the miniaturization of electronic devices, the photon tunneling effect appears inevitably found in the miniaturization of the process of the photonic crystal device. This is because the miniaturization of the process of the photonic crystal with the lattice constant is fixed, and can only reduce the number of cycles, the photons have a chance to penetrate the forbidden band. Simulation analysis of photonic crystal parameters influence found: the larger the dielectric constant of the medium can be reduced tunneling probability of photonic crystal lattice of the tunneling probability is very large, and the radius of the material can influence ignored.

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CLC: > Mathematical sciences and chemical > Crystallography > Crystal physics > The optical properties of the crystal
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