Ermolaev Georgy A, Kushnir Sergey E, Sapoletova Nina A, Napolskii Kirill S
Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 143026 Moscow, Russia.
Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia.
Nanomaterials (Basel). 2019 Apr 23;9(4):651. doi: 10.3390/nano9040651.
Photonic crystals based on titanium oxide are promising for optoelectronic applications, for example as components of solar cells and photodetectors. These materials attract great research attention because of the high refractive index of TiO. One of the promising routes to prepare photonic crystals based on titanium oxide is titanium anodizing at periodically changing voltage or current. However, precise control of the photonic band gap position in anodic titania films is a challenge. To solve this problem, systematic data on the effective refractive index of the porous anodic titanium oxide are required. In this research, we determine quantitatively the dependence of the effective refractive index of porous anodic titanium oxide on the anodizing regime and develop a model which allows one to predict and, therefore, control photonic band gap position in the visible spectrum range with an accuracy better than 98.5%. The prospects of anodic titania photonic crystals implementation as refractive index sensors are demonstrated.
基于二氧化钛的光子晶体在光电子应用方面很有前景，例如作为太阳能电池和光电探测器的组件。由于TiO的高折射率，这些材料吸引了大量的研究关注。制备基于二氧化钛的光子晶体的一种有前景的方法是在周期性变化的电压或电流下进行钛阳极氧化。然而，精确控制阳极二氧化钛薄膜中的光子带隙位置是一项挑战。为了解决这个问题，需要有关多孔阳极氧化钛有效折射率的系统数据。在本研究中，我们定量确定了多孔阳极氧化钛有效折射率对阳极氧化条件的依赖性，并开发了一个模型，该模型能够预测并因此控制可见光谱范围内光子带隙的位置，精度优于98.5%。展示了阳极二氧化钛光子晶体作为折射率传感器的应用前景。
