Paper 13102-168
3D printed alumina as a millimeter-wave optical element
On demand | Presented live 20 June 2024
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.
Presenter
Rex Lam
Univ. of Minnesota, Twin Cities (United States)
Rex Lam is a researcher at the University of Minnesota working with laser ablation to create sub-wavelength structures on alumina for anti-reflection coating purposes.