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Regulation Properties of Liquid Crystal Defect One-dimensional Photonic Crystal Micro-cavity

Author: YanGuiZhong
Tutor: QianXiangZhong
School: Wenzhou University
Course: Condensed Matter Physics
Keywords: Photonic crystals Liquid crystal defects Micro-cavity Temperature tuning Voltage influence Quality factor
CLC: O734
Type: Master's thesis
Year: 2010
Downloads: 74
Quote: 0
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Abstract


With the 1980s, the advent of photonic crystals, after the majority of researchers in this field of research, the theory of photonic crystals increasingly deepen and mature. The reason why the development of photonic crystals up to now such a wide range of situations, mainly because of its physical characteristics and the production of photonic crystal devices compared to conventional optics has many new features and new benefits. Photonic crystals are composed of two periodic arrangement of high and low refractive index dielectric optical material, it has unique physical properties - form a photonic band gap. With this unique physical properties can be designed with a new physical properties of many optical devices. In this paper, one-dimensional photonic crystals based on the introduction of a nematic liquid crystal as a defect, which constitutes one-dimensional liquid crystal defect photonic crystal micro-cavity, and then discuss the nature of the cavity and the temperature and voltage effects on these properties and regulation. This article consists of the following: From the transfer matrix deduced photonic crystal dispersion relation, obtained by numerical simulation of one-dimensional photonic crystal photonic band gap, analyzing the factors that affect the photonic band gap; around the liquid crystal electro-optical and thermo-optic effect effect, introduce a nematic liquid crystal temperature characteristics and voltage characteristics, the main effects of temperature and voltage on the nematic liquid crystal birefringence effects; dimensional photonic crystals in a nematic liquid crystal defects introduced, based on micro-Resonator conditions proposed can produce one-dimensional photonic crystal resonant micro-cavity model, and then use the transfer matrix calculation Micro-cavity performance parameters, such as the resonance wavelength, the width of the defect mode, quality factor, etc., then the temperature and voltage, respectively, for the control variable discuss in detail the temperature and voltage, respectively, the performance of the entire micro-resonator parameters. Resonance wavelength resonance phenomenon represents the value of the operating wavelength. Resonant micro-cavity mold width is a very important parameter is the bandwidth of resonance, the same micro-resonator quality factor is an important performance parameters, which directly determines the one-dimensional photonic crystal micro-cavity perform. In this paper, numerical simulation and make the appropriate changes in the image, to analyze the temperature and voltage changes so one-dimensional photonic crystal resonator performance parameters. Finally, according to temperature and voltage regulation, on the one-dimensional photonic crystal micro-cavity performance parameters of a comprehensive tuning.

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