Design and Fabrication of Metamaterial Anti-Reflection Coatings for the Simons Observatory

被引：14

作者：

Golec, Joseph E. ^{[1
]}

McMahon, Jeffrey J. ^{[1
,2
,3
,4
]}

Ali, Aamire M. ^{[5
]}

Dicker, Simon ^{[6
]}

Galitzki, Nicholas ^{[7
]}

Harrington, Kathleen ^{[2
]}

Westbrook, Benjamin ^{[5
]}

Wollack, Edward J. ^{[8
]}

Xu, Zhilei ^{[6
]}

Zhu, Ningfeng ^{[6
]}

机构：

[1] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA

[3] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[4] Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA

[5] Univ Calif Berkeley, Dept Phys, Berkeley, CA USA

[6] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[7] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[8] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

来源：

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION IV | 2020年 / 11451卷

关键词：

Simons Observatory; millimeter wavelengths; CMB; anti-reflection coatings; BROAD-BAND;

D O I：

10.1117/12.2561720

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Simons Observatory (SO) will be a cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope, which will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 transition-edge sensor (TES) bolometers in six spectral bands centered between 27 and 280 GHz in order to achieve the sensitivity necessary to measure or constrain numerous cosmological quantities, as outlined in The Simons Observatory Collaboration et al. (2019). These telescopes require 33 highly transparent, large aperture, refracting optics. To this end, we developed mechanically robust, highly efficient, metamaterial anti-reflection (AR) coatings with octave bandwidth coverage for silicon optics up to 46 cm in diameter for the 22-55, 75-165, and 190-310 GHz bands. We detail the design, the manufacturing approach to fabricate the SO lenses, their performance, and possible extensions of metamaterial AR coatings to optical elements made of harder materials such as alumina.

引用

页数：8