首页|Linear dichroism transition and polarization-sensitive photodetector of quasi-one-dimensional palladium bromide
Linear dichroism transition and polarization-sensitive photodetector of quasi-one-dimensional palladium bromide
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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 PdBr2 by using combined measurements of the angle-resolved polarized Raman spectroscopy(ARPRS)and anisotropic opti-cal absorption spectrum.The analyses of ARPRS data validate the anisotropic Raman properties of the PdBr2 flake.And anisotropic optical absorption spectrum of PdBr2 nanoflake demonstrates distinct optical linear dichroism rever-sal.Photodetector constructed by PdBr2 nanowire exhibits high responsivity of 747 A·W-1 and specific detectivity of 5.8×1012 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 PdBr2,establishing it as a promising candidate for miniaturization and integration trends of polarization-related applica-tions.
linear dichroism reversalpolarization sensitivityanisotropypolarized photodetector
朱万里、甄伟立、牛瑞、焦珂珂、岳智来、胡慧杰、薛飞、张昌锦
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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
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国家重点研发计划国家重点研发计划国家自然科学基金Basic Research Program of the Chinese Academy of Sciences Based on Major Scientific Infrastructures