Development of solar selective absorbers and sky radiators based on two-dimensional diffractive grating surfaces
Development of solar selective absorbers and sky radiators based on two-dimensional diffractive grating surfaces
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DOI：
10.1117/12.662672
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发表时间：
2006-04
期刊：
影响因子：
--
通讯作者：
M. Hasumi;H. Yugami
中科院分区：
文献类型：
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作者：
M. Hasumi;H. Yugami
研究了二维（2D）金属表面光栅的光谱特性，以开发高性能的太阳选择性吸收器和天空辐射器。基于严格耦合波分析（RCWA）进行了数值计算，并采用光刻和蚀刻工艺在硅衬底上制备了表面光栅。测量了样品的反射率光谱，它们对每种应用都表现出良好的光谱选择性。为了以低成本制造大面积表面微结构，提出了直接金属压印技术。采用电镀技术制备了太阳能选择性吸收器表面的微结构镍金属模具，并利用机械压印系统在铜金属表面进行了压印实验。结果，表面结构的某些部分成功地转移到铜基板上。
Spectral properties of two-dimensional (2D) metal surface gratings are investigated to develop high performance solar selective absorbers and sky radiators. Numerical calculations based on rigorous coupled-wave analysis (RCWA) are performed and surface gratings are fabricated on silicon substrates by means of photolithography and etching process. Reflectivity spectra of the samples are measured and they show good spectral selectivity for each application. In order to fabricate surface microstructures in large area with low cost, direct metal imprinting technology are proposed. A microstructured nickel metal mold for the solar selective absorber surface is fabricated by means of electroplating technique and imprint experiments are performed on copper metal surface using mechanical pressing system. As a result, some parts of the surface structures are successfully transferred onto copper substrate.