3D printed alumina as a millimeter-wave optical element

Rex Lam; Scott Cray; Calvin Firth; Shaul Hanany; Jürgen Koch; Kuniaki Konishi; Tomotake Matsumura; Yuki Sakurai; Haruyuki Sakurai; Ryota Takaku; Andrew Yan

doi:10.1117/12.3019180

16 August 2024 3D printed alumina as a millimeter-wave optical element

Rex Lam, Scott Cray, Calvin Firth, Shaul Hanany, Jürgen Koch, Kuniaki Konishi, Tomotake Matsumura, Yuki Sakurai, Haruyuki Sakurai, Ryota Takaku, Andrew Yan

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131022N (2024) https://doi.org/10.1117/12.3019180
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We present transmission and loss measurements of 3D printed alumina and reflectance measurement of a sample with 3D printed sub-wavelength structures anti-reflection coatings (SWS-ARC). For a band between 160 and 700 GHz we find an index of refraction n = 3.11 ± 0.01 and loss tan δ = 0.002 ± 0.003. Transmission measurements between 160 and 250 GHz of a sample with SWS-ARC 3D printed on one side give a reduction of reflectance from a maximum of 64% to a maximum of 31% over the band, closely matching predictions. These first measurements of the index and loss over this frequency band suggest that the material could be useful for astrophysical applications.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Rex Lam, Scott Cray, Calvin Firth, Shaul Hanany, Jürgen Koch, Kuniaki Konishi, Tomotake Matsumura, Yuki Sakurai, Haruyuki Sakurai, Ryota Takaku, and Andrew Yan "3D printed alumina as a millimeter-wave optical element", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131022N (16 August 2024); https://doi.org/10.1117/12.3019180

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