Xiaojing Ju, Weiyi Yang, Shuang Gao, Qi Li,
https://pubs.acs.org/doi/10.1021/acsami.9b10561
The direct writing technology was used to create microfluidic 3D terahertz photonic crystal structures (3D-TPCSs) with a glass cement ink, which demonstrated potentials for various terahertz technology applications. By a simple injection of liquid alloy into them, metallic 3D-TPCSs could be created easily with a low cost to solve the challenges on their creation by current approaches. These microfluidic 3D-TPCSs also possessed a specific capability of changing their terahertz properties in real time without structure changes by injecting fluidic media with different dielectric properties into their microfluidic channels, which endowed them the easy integration into various terahertz devices that require terahertz modulation for a wide range of applications. Due to their micro-sized channel structure and subsequent reduction of terahertz irradiation absorption by water in them, they demonstrated the potential as real time, nondestructive biological and chemical sensors to detect changes occurred in fluidic media in them with the terahertz time-domain spectroscopy (THz-TDS).
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