Amotchkina Tatiana, Trubetskov Michael, Schulz Marcus, Pervak Vladimir
Opt Express. 2019 Feb 18;27(4):5557-5569. doi: 10.1364/OE.27.005557.
Two beamsplitters operating across the near-infrared (770-1050 nm) and mid-infrared (4-8 µm) spectral ranges are developed. For the first time, the beamsplitters based on thin-film materials combinations of ZnS/YbF and Ge/YbF are investigated. The multilayers operate at the Brewster angle of ZnSe substrate. There are no special temperature conditions. The dichroic coatings are designed, produced, and carefully characterized. Potentials of the ZnS/YbF and Ge/YbF thin-film material combinations are discussed based on analytical estimations, as well as on optical and non-optical characterization results. The ZnS/YbF pair provides high reflectance in the near-infrared spectral range. The Ge/YbF solutions exhibit very broadband reflection zones. The Ge/YbF coatings are thinner and comprise fewer layers than ZnS/YbF multilayers. Ge/YbF pair has high potential for design and production of NIR-MIR coatings.
开发了两种分别工作在近红外（770 - 1050纳米）和中红外（4 - 8微米）光谱范围内的分束器。首次对基于ZnS/YbF和Ge/YbF薄膜材料组合的分束器进行了研究。这些多层膜在ZnSe衬底的布儒斯特角下工作。不存在特殊的温度条件。设计、制作并仔细表征了二向色涂层。基于分析估计以及光学和非光学表征结果，讨论了ZnS/YbF和Ge/YbF薄膜材料组合的潜力。ZnS/YbF对在近红外光谱范围内提供高反射率。Ge/YbF组合表现出非常宽的反射区。Ge/YbF涂层比ZnS/YbF多层膜更薄且层数更少。Ge/YbF对在近红外 - 中红外涂层的设计和生产方面具有很大潜力。
