亚波长光栅与法布里-珀罗滤光片集成的高性能光谱偏振分光器
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1.中国科学院上海技术物理研究所红外物理国家重点实验室,上海200083;2.上海节能镀膜玻璃工程技术研究中心,上海200083;3.中国科学院大学,北京100049;4.上海科技大学物质科学与技术学院,上海201210

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基金项目:

国家重点研发计划“变革性技术关键科学问题”重点专项(2021YFA0715500);国家自然科学基金项目(12227901);上海市市级科技重大专项(2019SHZDZX01);中国科学院国际人才计划(2021PT0007)


High-performance Spectro-Polarimetric Filter by integrating Subwavelength Gratings with Fabry-Perot filter
Author:
Affiliation:

1.State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China;2.Shanghai Engineering Research Center of Energy-Saving Coatings, Shanghai, 200083, China;3.University of Chinese Academy of Sciences, Beijing, 100049, China;4.School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

Fund Project:

National Key R&D Program of China (2021YFA0715500); National Natural Science Foundation of China (NSFC) (12227901); Shanghai Municipal Science and Technology Major Project (2019SHZDZX01); Chinese Academy of Sciences President(2021PT0007)

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    摘要:

    光谱偏振成像技术是一种新型的光学成像技术,它不仅提高了从目标获取的信息量,而且降低了背景噪声,可以捕捉目标细节并识别伪装目标。本文提出了一种将亚波长光栅与法布里-珀罗滤光片集成在一起的光谱偏振分光器,该器件可以获得超高的光谱分辨率和偏振消光比,并且光谱和偏振可以灵活的独立地调控。本文设计的光谱偏振分光器,可以同时获得4个光谱通道的斯托克斯参数。仿真结果表明,它的光谱分辨率(λ/?λ)为217,偏振消光比为10^6。实验测得亚波长光栅的偏振消光比达到500以上,传输效率达到90%。全介质F-P滤光片在长波红外波段的光谱分辨率为30,传输效率为60%。该设计方法具有通用性,可用于可见光、红外甚至太赫兹等波段。得益于这些优点,它在微型偏振光谱仪和全斯托克斯偏振检测等领域具有巨大的应用潜力。

    Abstract:

    Spectral polarization imaging technology is a novel optical imaging technique that not only enhances the amount of information acquired from targets, but also reduces background noise, which can capture target details and detect disguised targets. This paper presents a spectro-polarimetric device by integrating subwavelength gratings with Fabry-Perot (F-P) filter, which can obtain ultra-high spectral resolution and polarization extinction ratio with high control flexibly on both spectrum and polarization. A pectro-polarimetric filter has been designed to obtain 4 spectral channels of stokes parameters simultaneously. Simulation results show that it has a spectral resolution (SR, ) of 217 and polarization extinction ratio (PER) of . The polarization extinction ratio of subwavelength grating is measured to be over 500 PER with 90% transmission efficiency. The spectral resolution of all-dielectric F-P filter is measured to be30 with 60% transmission efficiency in the long wave infrared band. The design method is universal and can be used in a wide range of wavelength bands such as visible, infrared, and even terahertz. It has great potential applications in fields such as micro-polarization spectrometers and full-stokes polarization detection, benefiting from these advantages.

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  • 收稿日期:2023-07-02
  • 最后修改日期:2023-07-02
  • 录用日期:2023-08-10
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