Optical Modification of TMD Heterostructures
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Optical modification is a fast, cost-effective, and scalable approach to tailoring the physical properties of two-dimensional (2D) materials for various applications. However, most previous efforts have focused on modifying individual 2D materials, which fails to utilize the method to its fullest potential. In this paper, heterostructures composed of hBN-capped molybdenum ditelluride (MoTe 2 ) and molybdenum disulfide (MoS 2 ) are optically modified with a continuous wave laser. The process simultaneously thins MoS 2 and induces clustering of tellurium atoms from the ablated MoTe 2 . These structural changes result in significant enhancements of the physical properties, including a 43-fold increase in MoS 2 photoluminescence and the transformation of the heterojunction into an anti-ambipolar transistor. These findings highlight a previously unutilized pathway to tune the heterostructure properties for applications in novel electronics and optoelectronics.
Source: Nano Letters
Authors: Suvi-Tuuli Varjamo, Christopher Edwards, Yaoqiang Zhou, Ruihuan Fang, Seyed Hossein Hosseini Shokouh, Zhipei Sun
Institution: Aalto University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Awards: Atomic-scale nonlinear optical interferometers, G3409804814, Finnish Centre of Excellence in Quantum Technology, Integrated Photonic-Nano Technologies for Bioapplications, G464620423, Infrastructure for single photon correlation studies, Biomaterial-based photonics and optoelectronics for sustainable ICT systems, Finnish Geospatial Research Institute, G6892745064, G7506162914, G7756516679, Atomically-engineered nonlinear photonics with two-dimensional layered material superlattices
OpenAlex ID: W4408203256