Abstract Ge/TiO2 one-dimensional photonic crystals (1DPC), with low infrared-emissivity in the 8−14 μm 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 μm 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.

中文翻译：

---

8-14 μm波段低红外发射率Ge/TiO2一维光子晶体的制备与表征

摘要 Ge/TiO2 一维光子晶体 (1DPC) 在 8~14 μm 波段具有低红外发射率，通过光学镀膜技术在石英衬底上交替 Ge 和 TiO2 层，成功设计和制备了 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) 表征所制备的 1DPC 的微观结构和光谱发射率。微观结构分析表明，所制备的1DPC具有明显的多层结构特征，Ge层和TiO2层的厚度与目标值非常接近或相同。光谱发射率显示所制备的 1DPC 在 8-14 μm 波段具有低红外发射率。事实上，平均发射率可以低至0.202，符合我们设计的要求。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材料。这一结果增加了制备低红外辐射材料所需原材料的选择范围。