High-temperature resistive surface grating for spectral control of thermal radiation
High-temperature resistive surface grating for spectral control of thermal radiation
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DOI：
10.1063/1.1560867
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发表时间：
2003-03-17
影响因子：
4
通讯作者：
Yugami, H
中科院分区：
文献类型：
--
作者：
Sai, H;Kanamori, Y;Yugami, H
研究了二维W光栅的光谱发射率和热稳定性，以获得高温电阻选择性发射器。基于严格的耦合波分析的数值计算进行，以确定具有良好的光谱选择性的光栅的结构轮廓。根据所确定的参数，在单晶和多晶W衬底上制作了周期为1.0 μ m的矩形微腔组成的二维W光栅。光栅显示出强的发射峰，这可以由腔内的受限模式来解释。由单晶W制成的壁厚为200 nm的光栅在1400 K以上显示出非常高的热稳定性，而多晶光栅由于晶粒生长而在高温下变形。(C)2003年，美国物理学会。
Spectral emittance and thermal stability of two-dimensional W gratings are investigated to obtain high-temperature resistive selective emitters. Numerical calculations based on rigorous coupled-wave analysis are performed to determine the structural profile of gratings with good spectral selectivity. According to the determined parameters, two-dimensional W gratings composed of rectangular microcavities with the period of 1.0 mum are fabricated on single crystalline and polycrystalline W substrates. The grating shows a strong emission peak which can be explained by the confined modes inside the cavities. The grating with 200 nm wall thickness made from a single crystalline W shows very high thermal stability over 1400 K, while the polycrystalline grating is deformed at a high temperature because of the grain growth. (C) 2003 American Institute of Physics.