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Titanium Dioxide Engineered for Near-dispersionless High Terahertz Permittivity and Ultra-low-loss
Chuying, Yu Zeng, Yang Yang, Bin Donnan, Robert S. Huang, Jinbao Xiong, Zhaoxian Mahajan, Amit Shi, Baogui Ye, Haitao Binions, Russell
Chuying, Yu
Zeng, Yang
Yang, Bin
Donnan, Robert S.
Huang, Jinbao
Xiong, Zhaoxian
Mahajan, Amit
Shi, Baogui
Ye, Haitao
Binions, Russell
Advisors
Editors
Other Contributors
EPub Date
Publication Date
2017-07-26
Submitted Date
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accepted manuscript
Adobe PDF, 843.3 KB
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Abstract
Realising engineering ceramics to serve as substrate materials in high-performance terahertz(THz) that are low-cost, have low dielectric loss and near-dispersionless broadband, high permittivity, is exceedingly demanding. Such substrates are deployed in, for example, integrated circuits for synthesizing and converting nonplanar and 3D structures into planar forms. The Rutile form of titanium dioxide (TiO2) has been widely accepted as commercially economical candidate substrate that meets demands for both low-loss and high permittivities at sub-THz bands. However, the relationship between its mechanisms of dielectric response to the microstructure have never been systematically investigated in order to engineer ultra-low dielectric-loss and high value, dispersionless permittivities. Here we show TiO2 THz dielectrics with high permittivity (ca. 102.30) and ultra-low loss (ca. 0.0042). These were prepared by insight gleaned from a broad use of materials characterisation methods to successfully engineer porosities, second phase, crystallography shear-planes and oxygen vacancies during sintering. The dielectric loss achieved here is not only with negligible dispersion over 0.2 - 0.8 THz, but also has the lowest value measured for known high-permittivity dielectrics. We expect the insight afforded by this study will underpin the development of subwavelength-scale, planar integrated circuits, compact high Q-resonators and broadband, slow-light devices in the THz band.
Citation
Chuying, Y., et al. (2017). Titanium Dioxide Engineered for Near-dispersionless High Terahertz Permittivity and Ultra-low-loss. Scientific Reports, 7, 6639.
Publisher
Nature Publishing Group
Journal
Scientific Reports
Research Unit
DOI
10.1038/s41598-017-07019-9
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
Series/Report no.
ISSN
EISSN
2045-2322