Symmetry-Reduction Enhanced Polarization-Sensitive Photoresponse Based on One-Dimensional van der Waals Materials

• DOI: 10.1021/acsami.4c03233
• Publication Date: 2024-05-02T07:06:53Z
• Authors: Wei Gan; Yucheng Liu; Xue Liu; Ruichun Xiao; Kaipeng Ni; Ming Jiang; Hui Han; Xiaoya Zhou; Sijia Li; Chuanqiang Wu; Yang Li; Hui Li

Designing high-performance polarization-sensitive photodetectors is essential for photonic device applications. Anisotropic one-dimensional (1D) van der Waals (vdW) materials have provided a promising platform to that end. Despite significant advances in 1D vdW devices, their performance still far from delivering practical potential. Herein, we propose the design of using unique materials. By leveraging chemical vapor transport technique, successfully fabricate high-quality Nb2Pd1–xSe5 (x = 0.29) nanowires. The photodetector exhibits high mobility ∼56 cm2/(V s) and superior photoresponse performance, including responsivity 1A/W an ultrafast response time ∼8 μs under 638 nm illumination. Moreover, demonstrates excellent with degree linear polarization (DOLP) up 0.85 can be modulated by adjusting gate voltage, laser power density, wavelength. Those exceptional are believed relevant symmetry-reduction induced partial occupation Pd sites. This study offers feasible approaches enhance anisotropy modulation photoresponse, which may provide deep insights into physical origin anisotropic properties