Electronic transport and polarization-dependent photoresponse in few-layered hafnium trisulfide (HfS₃) nanoribbons

Abstract

Few-layered HfS3 nanoribbons exhibit n-type conductivity and a large photoresponse to visible light. The photocurrent strongly depends on the polarization direction of the excitation laser due to the highly anisotropic quasi-1D crystal structure of HfS3.

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

“…Discovering an experimental pathway to realize high-performance polarization-sensitive photodetectors is a central technological goal in the design of photonic devices, which has deep implications in remote sensing, optical navigation, polarimetric imaging, and free-space communication applications. − Diverse approaches have been attempted toward these promising functionalities, including the adoption of anisotropic low-dimensional structures, − the subtle construction of heterostructures, , and the design of in-plane homojunctions, etc. , which have been of great interest in the materials research community.…”

“…Among them, a powerful way to enhance the anisotropic photonic effect is through the adoption of low-dimensional materials, in particular, for the one-dimensional (1D) van der Waals (vdW) materials, such as HfS 3 , Nb 2 Pd 3 Se 8 , and Ta 2 Ni 3 Se 8 . The unique anisotropic crystal structure of 1D vdW materials ensures the attainment of the superior polarization-sensitive performance due to the emerged anisotropic chemical and physical properties arising from their strong quantum confinement effect and striking anisotropic phonon vibration, photon absorption, and electric band structures. , Moreover, the distinct 1D structure significantly reduces the lattice symmetry, which also carries great promising for the anisotropic technological applications .…”