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

• Published in: Chinese physics B Vol. 33; no. 6; pp. 68101 - 538
• Main Authors: Zhu, Wan-Li, Zhen, Wei-Li, Niu, Rui, Jiao, Ke-Ke, Yue, Zhi-Lai, Hu, Hui-Jie, Xue, Fei, Zhang, Chang-Jin
• Format: Journal Article
• Language: English
• Published: Chinese Physical Society and IOP Publishing Ltd 01.05.2024
• Subjects: anisotropy; linear dichroism reversal; polarization sensitivity; polarized photodetector; polarization sensitivity; linear dichroism reversal; polarized photodetector; anisotropy
• ISSN: 1674-1056; 2058-3834; 2058-3834
• DOI: 10.1088/1674-1056/ad36ba

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.