Abstract
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.
基金项目
国家重点研发计划(2022YFA1403203)
国家重点研发计划(2021YFA1600201)
国家自然科学基金(12274414)
Basic Research Program of the Chinese Academy of Sciences Based on Major Scientific Infrastructures(JZHKYPT-2021-08)
NETL
NSTL
万方数据