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Highly In-Plane Anisotropic 2D PdSe_2 for Polarized Photodetection with Orientation Selectivity

机译：具有方向选择性的极性光检测的高度面内各向异性2D PDSE_2

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摘要

Polarized photodetection based on anisotropic two-dimensional materials display promising prospects for practical application in optical communication and optoelectronic fields. However, most of the reported polarized photodetection are limited by the lack of valid tunable strategy and low linear dichroism ratio. A peculiar noble metal dichalcogenide-PdSe(2)with a puckered pentagonal structure and abnormal linear dichroism conversion-potentially removes these restrictions and is demonstrated in this study. Herein, azimuth-dependent reflectance difference microscopy combined with anisotropic electrical transport measurements indicate strong in-plane anisotropic optical and electrical properties of two-dimensional PdSe2. Remarkably, the typical polarization-resolved photodetection exhibits anisotropic photodetection characteristics with a dichroic ratio up to approximate to 1.8 at 532 nm and approximate to 2.2 at 369 nm, and their dominant polarization orientation differs by 90 degrees corresponding to thea-axis andb-axis, respectively. The unique orientation selection behavior in polarization-dependent photodetection can be attributed to the intrinsic linear dichroism conversion. The results make 2D PdSe(2)a promising platform for investigating anisotropic structure-property correlations and integrated optical applications for novel polarization-sensitive photodetection.
机译：基于各向异性二维材料的偏振光检测显示了光通信和光电领域的实际应用前景。然而，大多数报道的极化光检测受缺乏有效的可调策略和低线性二色性比值的限制。一种特殊的贵金属二甲基化物-PDSE（2）具有褶皱五角形结构和异常线性二色性转换 - 可能除去这些限制，并在本研究中证明。这里，方位依赖性反射率差异显微镜与各向异性电传输测量结合表示二维PDSe2的强平面各向异性光学和电性能。值得注意的是，典型的偏振分离的光电探测表现出直级光电检测特性，二向量比率在532nm处近似为1.8，并且在369nm处近似为2.2，并且它们的主导偏振取向与The轴和B轴相对应的90度不同，分别。偏振依赖性光检测中的独特取向选择行为可归因于内在的线性二色性转换。结果使2D PDSE（2）为研究各向异性结构性质相关性和用于新颖的偏振敏感性光电探测的有前途的平台。

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  • 来源
    《Advanced Functional Materials》 |2021年第3期|2006774.1-2006774.9|共9页
  • 作者

    Pi Lejing; Hu Chunguang; Shen Wanfu; Li Liang; Luo Peng; Hu Xiaozong; Chen Ping; Li Dongyan; Li Zexin; Zhou Xing; Zhai Tianyou;

  • 作者单位

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

    Tianjin Univ State Key Lab Precis Measuring Technol & Instrume Tianjin 300072 Peoples R China;

    Tianjin Univ State Key Lab Precis Measuring Technol & Instrume Tianjin 300072 Peoples R China;

    Anhui Univ Minist Educ Inst Phys Sci & Informat Technol Key Lab Struct & Funct Regulat Hybrid Mat Hefei 230601 Peoples R China;

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

    Zhengzhou Univ Green Catalysis Ctr Zhengzhou 450001 Peoples R China|Zhengzhou Univ Coll Chem Zhengzhou 450001 Peoples R China;

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol HUST Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    in-plane anisotropy; orientation selectivity; PdSe2; polarized photodetector; 2D materials;

    机译：面内各向异性;取向选择性;PDSE2;偏振光探测器;2D材料;

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