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Properties of Coherent Thermal Emission of One-dimensional Defective Periodic Structure

Author: LiuXiaoYuan
Tutor: ZhouZhongXiang
School: Harbin Institute of Technology
Course: Optics
Keywords: Photonic crystals Thermal radiation Transfer matrix Photon localization Defect
CLC: O734
Type: Master's thesis
Year: 2010
Downloads: 69
Quote: 0
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Abstract


In recent years , with the development of nano- photonics , micro or nano -scale microstructure peculiar nature of thermal radiation caused a great deal of interest , this structure in the thermal photovoltaic systems, energy conversion systems and other fields have a very good application prospects , this paper is to study the defect containing one-dimensional periodic structure coherent thermal radiation properties . We analyzed the general non- absorbing defect layer containing a one-dimensional finite-length optical properties of the periodic structure , the thickness of the defect rate of the reflector , the one-dimensional periodic structure of the density of states , we found by calculating the one-dimensional periodic structure in the forbidden band edge peak density of states exists , the density of states within the band gap is zero, after the introduction of defect states corresponding defect density peaks . Absorbing medium containing SiC for one-dimensional finite length defect of the optical properties of periodic structure , we have conducted a study into the defect layer is divided into a direct insertion into and substitutional , we analyzed the defect layer thickness , the emissivity of the emitting angle studied, and the time and space radiation coherence discussed, given the emission peak temporal coherence characterization of the quality factor and characterization of spatial coherence of the radiation angular distribution. We studied the SiC- containing absorbing media defects semi-infinite one-dimensional photonic crystal structure properties of coherent radiation , and a periodic structure in front of the defect layer is of finite length can be made to reach the defects in the outer layer of the light field so as to be absorbed, and emissivity greatly enhanced due to defect modes and defect structure of the junction with the right side of the periodic surface wave excited by the coupling effect , we studied the defect layer thickness on the rate of emission , and gives an emission peak wavelength corresponding electric field spatial distribution , in addition to analyzing the defect mode on the thermal radiation of the radiation rate, coherent impact.

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