3D Printed Al2O3 for Terahertz Technology

IEEE Access

Jan C. Balzer¹  Jan Ornik²  Martin Koch²  Niels Benson³  Masoud Sakaki³ 

[1] Chair of Communication Systems, University of Duisburg-Essen, Duisburg, Germany;Department of Physics and Material Sciences Center, Philipps-University Marburg, Marburg, Germany;Faculty of Engineering, Institute of Technology for Nanostructures, University of Duisburg-Essen, Duisburg, Germany;

关键词: 3D printing;    ceramics;    Al₂O₃;    terahertz;    wave plate;   

DOI  :  10.1109/ACCESS.2020.3047514

来源: DOAJ

【 摘 要 】

In this work we demonstrate that 3D printed Al₂O₃ is a promising material for prototyping and precise fabrication of quasi-optical devices in the terahertz frequency range. The 3D printed Al₂O₃ exhibits a low absorption coefficient (α <; 2cm^-1at 1 THz) and a high refractive index (n > 3). The printing resolution in the sub 50 μm range allows for the implementation of structures in the 0.3-3.0 THz range on the subwavelength scale. Furthermore, the printing process enables the realization of crystalline solids, which allows the use of the Al₂O₃ birefringence effect. Here, a Δn ≈ 0.05 was achieved and used for the implementation of λ/2-wave plates working at ~1 THz. The material properties and wave plates were characterized using a terahertz time-domain spectrometer.

【 授权许可】

Unknown