Linear dichroism transition and polarization-sensitive photodetector of quasi-one-dimensional palladium bromide  

作　　者：朱万里 甄伟立 牛瑞 焦珂珂 岳智来 胡慧杰 薛飞 张昌锦 Wan-Li Zhu;Wei-Li Zhen;Rui Niu;Ke-Ke Jiao;Zhi-Lai Yue;Hui-Jie Hu;Fei Xue;Chang-Jin Zhang(Anhui Key Laboratory of Low-energy Quantum Materials and Devices,High Magnetic Field Laboratory,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;Science Island Branch,Graduate School of University of Science and Technology of China,Hefei 230026,China;School of Physics,Hefei University of Technology,Hefei 230601,China;Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]Anhui Key Laboratory of Low-energy Quantum Materials and Devices,High Magnetic Field Laboratory,HFIPS,Chinese Academy of Sciences,Hefei 230031,China [2]Science Island Branch,Graduate School of University of Science and Technology of China,Hefei 230026,China [3]School of Physics,Hefei University of Technology,Hefei 230601,China [4]Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Physics B》2024年第6期532-539,共8页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China (Grant Nos. 2022YFA1403203 and 2021YFA1600201);the National Natural Science Foundation of China (Grant No. 12274414);the Basic Research Program of the Chinese Academy of Sciences Based on Major Scientific Infrastructures (Contract No. JZHKYPT-2021-08)。

摘　　要：Perpendicular optical reversal of the linear dichroism transition has promising applications in polarization-sensitive optoelectronic devices. We perform a systematical study on the in-plane optical anisotropy of quasi-one-dimensional PdBr_(2) by using combined measurements of the angle-resolved polarized Raman spectroscopy(ARPRS) and anisotropic optical absorption spectrum. The analyses of ARPRS data validate the anisotropic Raman properties of the PdBr_(2) flake.And anisotropic optical absorption spectrum of PdBr_(2) nanoflake demonstrates distinct optical linear dichroism reversal. Photodetector constructed by PdBr_(2) nanowire exhibits high responsivity of 747 A·W^(-1) and specific detectivity of 5.8×10^(12) Jones. And the photodetector demonstrates prominent polarization-sensitive photoresponsivity under 405-nm light irradiation with large photocurrent anisotropy ratio of 1.56, which is superior to those of most of previously reported quasi-one-dimensional counterparts. Our study offers fundamental insights into the strong optical anisotropy exhibited by PdBr_(2), establishing it as a promising candidate for miniaturization and integration trends of polarization-related applications.

关 键 词：linear dichroism reversal polarization sensitivity ANISOTROPY polarized photodetector 

分 类 号：TN36[电子电信—物理电子学]