Metamaterial polarizer providing principally unlimited extinction
Metamaterial polarizer providing principally unlimited extinction
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DOI：
10.1364/ol.44.005630
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发表时间：
2019-11-15
期刊：
影响因子：
3.6
通讯作者：
Magnusson, Robert
中科院分区：
文献类型：
--
作者：
Hemmati, Hafez;Bootpakdeetam, Pawarat;Magnusson, Robert
偏振器是广泛应用于成像、显示、显微镜、干涉测量、椭偏测量和仪器仪表等领域的通用元件。在这里，我们展示了设计和制造的一类新的偏振器，是非常紧凑和有效的。基于一种低损耗的单谐振光栅，我们研制了一种具有高消光比偏振器的多层膜组件。元素偏振器包含石英衬底上的晶体硅的亚波长周期性图案。两个双光栅模块的堆叠在电信光谱区域中类似于50 nm的带宽上，在稀疏的2 mm厚设备中测得的消光比（ER）类似于100，000。理论计算表明，极端的消光值是可能的。本文探讨的基本概念的进一步发展可能导致具有优异属性的新型实用偏振器。(C)2019美国光学学会
Polarizers are universal components deployed in diverse application fields including imaging, display, microscopy, interferometry, ellipsometry, and instrumentation. Here, we demonstrate design and fabrication of a new class of polarizers that are extremely compact and efficient. Based on an elemental low-loss single-resonant grating, we develop multilayer modules providing ultrahigh extinction ratio polarizers. The elemental polarizer contains a subwave-length periodic pattern of crystalline silicon on a quartz substrate. A stack of two dual-grating modules exhibits a measured extinction ratio (ER) of similar to 100,000 in a sparse 2-mm-thick device across a bandwidth of similar to 50 nm in the telecommunications spectral region. Theoretical computations indicate that extreme values of extinction are possible. Further development of the basic concepts explored herein may lead to a new class of practical polarizers with excellent attributes. (C) 2019 Optical Society of America