Single-layer titanium dioxide (TiO2, ZnO, double-layer TiO2/ZnO and multilayer TiO2/ZnO/TiO2/ZnO were grown on ordinary glass substrate by ultrasonic spray deposition at 300∘C. Titanium chloride, zinc acetate and deionized water were employed as precursors. The ultraviolet–visible spectrometer spectra show that the quality of optical transmittance in visible wavelength range decreases as the number of bilayers increases. The crystalline phase of the thin films was identified through X-ray diffraction method with diffraction patterns scan used at 2[Formula: see text] from 10∘ to 90∘. From the DRX results, it is found that the crystallinity is enhanced when the number of TiO2/ZnO layers increased. From the 2D/3D atomic force microscopy (AFM) analysis, it is found that the surface of the films was covered by triangle-like particles. However, bilayer and multilayer TiO2/ZnO thin films show smooth and compacted surface roughnesses compared to single-layer TiO2 and ZnO, respectively. In addition to this experimental work, a multichannel filter based on TiO2/ZnO subphotonic crystals is suggested. The transmission properties of this filter have been investigated by means of the transfer-matrix method (TMM). The idea is to import a wedge of air with an apex angle as the defect layer to disturb the original periodicity of the oxide photonic crystal and generate some new kind of multichannel filtering properties.

中文翻译：

---

喷雾热解法制备的 TiO2/ZnO 光子晶体：在多通道过滤器中的应用

单层二氧化钛（TiO2, ZnO, 双层 TiO2/ZnO和多层TiO2/ZnO/TiO2/ZnO 在普通玻璃基板上通过超声喷雾沉积在 300∘C. 使用氯化钛、乙酸锌和去离子水作为前体。紫外-可见光谱仪光谱表明，可见光波长范围内的透光率质量随着双层数量的增加而降低。薄膜的结晶相通过 X 射线衍射方法鉴定，衍射图案扫描在 2 [公式：见文本] 从 10∘到 90∘. 从 DRX 结果可以看出，当 TiO2 的数量增加时，结晶度提高2/ZnO 层增加。从 2D/3D 原子力显微镜 (AFM) 分析发现，薄膜表面被三角形颗粒覆盖。然而，双层和多层 TiO2与单层 TiO2 相比，/ZnO 薄膜显示出光滑且致密的表面粗糙度2和氧化锌，分别。除了这项实验工作，基于 TiO2 的多通道滤波器2建议使用 /ZnO 亚光子晶体。该滤波器的传输特性已经通过传递矩阵方法（TMM）进行了研究。这个想法是引入一个顶角的空气楔作为缺陷层，以扰乱氧化物光子晶体的原始周期性，并产生一些新的多通道过滤特性。