Authors
Zhenyang Xiao, Fang Xu, Xuying Zhong, Jiaren Yuan, Xiaxia Liao, Weichang Zhou, Yangbo Zhou
Published in
Nanoscale. Jun 09, 2025. Epub Jun 09, 2025.
Abstract
Two-dimensional (2D) van der Waals (vdW) materials with low crystal symmetry exhibit unique anisotropic optical and electronic properties. Here, we systematically investigate the optical modulation effects induced by anisotropic 2D materials on their isotropic counterparts in vertically stacked heterostructures. Through angle-resolved polarized Raman and photoluminescence (PL) spectroscopy of MoS2/Nb4P2S21 heterostructures, we observe periodic modulation of Raman and PL intensities in the intrinsically isotropic monolayer MoS2, directly correlated with the crystallographic orientation of the anisotropic Nb4P2S21 substrate. This phenomenon arises from strong in-plane birefringence and dichroism in Nb4P2S21, which create a polarization-dependent Fabry-Pérot cavity that dynamically tailors the optical environment of MoS2via cavity-mediated interference. Furthermore, we demonstrate magnetic field control of this anisotropic response through magneto-optic coupling, while polarization-resolved photocurrent measurements reveal the effect of in-plane anisotropy in Nb4P2S21 on carrier transport in MoS2. Our work establishes a cavity-mediated methodology to engineer light-matter interactions in isotropic 2D materials through anisotropic heterostructure design, opening avenues for developing advanced polarization-sensitive optoelectronics such as angle-resolved photodetectors and reconfigurable optical modulators.
PMID:
40485378
Bibliographic data and abstract were imported from PubMed on 09 Jun 2025.
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