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Creation of 3D terahertz photonic crystals by the direct writing technique with a TiO 2 sol‐gel ink
Author(s) -
Wang Rong,
Yang Weiyi,
Zhu Pengfei,
Gao Shuang,
Li Bo,
Li Qi
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15347
Subject(s) - sol gel , materials science , terahertz radiation , inkwell , calcination , photonic crystal , rutile , photonics , band gap , optoelectronics , optics , nanotechnology , chemical engineering , composite material , chemistry , catalysis , biochemistry , physics , engineering
Three‐dimensional TiO 2 woodpile terahertz photonic crystals with feature size less than 100 μm were created by the direct writing technique with a TiO 2 sol‐gel ink. With proper heat treatment, the rheological properties of the TiO 2 sol‐gel ink were modulated to meet the requirement to construct 3D‐ TPC s with feature size less than 100 μm by the direct writing technique. Well‐crystallized rutile TiO 2 3D‐ TPC s were obtained by the calcination process to provide the required high refractive indices, while the lattice periods of these TiO 2 3D‐ TPC s could be changed to tune their terahertz properties. With the increase of the lattice period, a shift of their TH z photonic band gap peaks toward the lower frequency was observed in both the simulated and experimental investigations.