Laser-ablated pyramid coatings on alumina are designed and fabricated for the 30, 125, and 250 GHz bands, with simulated in-band reflectance at or below 2 percent.
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Prototype sub-wavelength structure anti-reflection coating on alumina filters for ground-based CMB telescopes
Laser-ablated pyramid coatings on alumina are designed and fabricated for the 30, 125, and 250 GHz bands, with simulated in-band reflectance at or below 2 percent.