Epoxy-based broadband antireflection coating for millimeter-wave optics.
Epoxy-based broadband antireflection coating for millimeter-wave optics.
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用于毫米波光学的环氧树脂宽带减反射涂层。
DOI：
10.1364/ao.52.008102
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发表时间：
2013
期刊：
影响因子：
1.9
通讯作者：
William Walker
中科院分区：
文献类型：
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作者：
D. Rosen;A. Suzuki;B. Keating;William Krantz;Adrian T. Lee;E. Quealy;P. Richards;Praweeen Siritanasak;William Walker
我们已经开发了基于环氧树脂的宽带涂层，用于低温光学的毫米波天体物理实验。通过使用多层涂层，其中每一层的介电常数步进，我们实现了在宽带宽上的低反射。我们抑制从氧化铝盘的反射到10%以上的分数带宽的92%和104%，分别使用两层和三层涂层。通过混合三种类型的环氧树脂并掺杂高介电混合物所需的钛酸锶粉末，环氧树脂的介电常数在2.06和7.44之间被调谐。在140 K时，两层涂层的带积分吸收损耗被抑制到1%以下，三层涂层的带积分吸收损耗被抑制到10%以下。
We have developed epoxy-based, broadband antireflection coatings for millimeter-wave astrophysics experiments with cryogenic optics. By using multiple-layer coatings where each layer steps in dielectric constant, we achieved low reflection over a wide bandwidth. We suppressed the reflection from an alumina disk to 10% over fractional bandwidths of 92% and 104% using two-layer and three-layer coatings, respectively. The dielectric constants of epoxies were tuned between 2.06 and 7.44 by mixing three types of epoxy and doping with strontium titanate powder required for the high dielectric mixtures. At 140 K, the band-integrated absorption loss in the coatings was suppressed to less than 1% for the two-layer coating, and below 10% for the three-layer coating.
霍隆理工学院/魏茨曼科学研究所（以色列）
DOI：
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