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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII
EditorsJonas Zmuidzinas, Jian-Rong Gao, Jian-Rong Gao
PublisherSPIE
ISBN (Electronic)9781510675278
DOIs
StatePublished - 2024
EventMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII 2024 - Yokohama, Japan
Duration: Jun 18 2024Jun 22 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume13102
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceMillimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII 2024
Country/TerritoryJapan
CityYokohama
Period6/18/246/22/24

Bibliographical note

Publisher Copyright:
© 2024 SPIE.

Keywords

  • 3D Printed
  • Alumina
  • Anti-reflective Coatings
  • Millimeter-wave Optical components
  • Sub-Wavelength Structures
  • Transmissivity

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