Three-dimensional TiO2 woodpile terahertz photonic crystals with feature size less than 100 μm were created by the direct writing technique with a TiO2 sol-gel ink. With proper heat treatment, the rheological properties of the TiO2 sol-gel ink were modulated to meet the requirement to construct 3D-TPCs with feature size less than 100 μm by the direct writing technique. Well-crystallized rutile TiO2 3D-TPCs were obtained by the calcination process to provide the required high refractive indices, while the lattice periods of these TiO2 3D-TPCs could be changed to tune their terahertz properties. With the increase of the lattice period, a shift of their THz photonic band gap peaks towards the lower frequency was observed in both the simulated and experimental investigations. This article is protected by copyright. All rights reserved.

中文翻译：

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使用 TiO2 溶胶-凝胶墨水通过直写技术创建 3D 太赫兹光子晶体

特征尺寸小于 100 μm 的三维 TiO2 木桩太赫兹光子晶体是通过使用 TiO2 溶胶-凝胶墨水的直写技术创建的。通过适当的热处理，TiO2 溶胶-凝胶墨水的流变特性得到调节，以满足通过直写技术构建特征尺寸小于 100 μm 的 3D-TPC 的要求。通过煅烧过程获得结晶良好的金红石 TiO2 3D-TPC，以提供所需的高折射率，而这些 TiO2 3D-TPC 的晶格周期可以改变以调整它们的太赫兹特性。随着晶格周期的增加，在模拟和实验研究中都观察到它们的太赫兹光子带隙峰值向较低频率移动。本文受版权保护。版权所有。