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首页> 外文期刊>Journal of Heat Transfer >Effects of Periodic Structures on the Coherence Properties of Blackbody Radiation
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Effects of Periodic Structures on the Coherence Properties of Blackbody Radiation

机译:周期性结构对黑体辐射相干特性的影响

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摘要

Radiative properties have been studied for one-dimensional dielectric multilayer structures subjected to blackbody radiation sources. The total hemispherical transmittances are calculated for periodic structures and structures with random variation in layer thickness, using wave-optics and ray-tracing methods. Simulation results show that for periodic structures, the transmittance calculated using wave optics approaches a nonzero constant value with an increasing number of layers, while the transmittance obtained using the ray-tracing method asymptotically approaches zero. For random structures, the transmittance given by wave optics drops to zero at different rates depending on the order of random variations in layer thickness. It is found that the wave interference effect always plays a role when dealing with multilayer structures. The results are explained based on extended and localized waves.
机译:已经对经受黑体辐射源的一维介电多层结构的辐射特性进行了研究。使用波光学和射线追踪方法,计算出周期性结构和层厚度随机变化的结构的总半球透射率。仿真结果表明,对于周期性结构,使用波光学计算的透射率接近非零常数值,且层数增加,而使用射线跟踪方法获得的透射率渐近地接近零。对于随机结构,取决于层厚度随机变化的顺序,波动光学器件给出的透射率以不同的速率下降到零。发现在处理多层结构时,波干扰效应总是起着作用。根据扩展波和局部波来解释结果。

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