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Preparation and characterization of Ge/TiO_2 one-dimensional photonic crystal with low infrared-emissivity in the 8-14 μm band

机译:8-14μm波段低红外发射率Ge / TiO_2一维光子晶体的制备与表征

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摘要

Ge/TiO2 one-dimensional photonic crystals (1DPC), with low infrared-emissivity in the 8 - 14 mu m band, were successfully designed and prepared by alternating the Ge and TiO2 layers on the quartz substrate using optical coating technology. The microstructure and spectral emissivity of the as-prepared 1DPC were characterized using scanning electron microscopy (SEM) and Fourier-transform infrared spectrometry (FTIR), respectively. The microstructural analysis indicates that the as-prepared 1DPC has clear structural multilayer characteristics, and the thicknesses of Ge layer and TiO2 layer are very close or identical with the target values. The spectral emissivity shows the as-prepared 1DPC has low infrared emissivity in the 8 - 14 mu m band. In fact, the average emissivity can be as low as 0.202, and meets the requirement of our design. The results of this paper show that low infrared emissivity materials can be prepared successfully using materials, which are not transparent for infrared light, via a suitable one-dimensional photonic structural design. This result increases the selection range of raw materials needed to prepare low infrared-emissivity materials.
机译:通过使用光学镀膜技术在石英基板上交替布置Ge和TiO2层,成功设计并制备了在8-14μm波段具有低红外发射率的Ge / TiO2一维光子晶体(1DPC)。分别使用扫描电子显微镜(SEM)和傅里叶变换红外光谱(FTIR)对制备的1DPC的微观结构和光谱发射率进行表征。显微组织分析表明,所制备的1DPC具有清晰的结构多层特性,Ge层和TiO2层的厚度与目标值非常接近或相同。光谱发射率表明,所制备的1DPC在8-14微米波段中具有较低的红外发射率。实际上,平均发射率可以低至0.202,可以满足我们设计的要求。本文的结果表明,通过合适的一维光子结构设计,可以使用对红外光不透明的材料成功制备低红外发射率的材料。该结果增加了制备低红外发射率材料所需的原材料的选择范围。

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