Dynamic tuning of terahertz atomic lattice vibration via cross-scale mode coupling to nanomechanical resonance in WSe₂ membranes.

ABSTRACT: Nanoelectromechanical systems (NEMS) based on atomically-thin tungsten diselenide (WSe₂), benefiting from the excellent material properties and the mechanical degree of freedom, offer an ideal platform for studying and exploiting dynamic strain engineering and cross-scale vibration coupling in two-dimensional (2D) crystals. However, such opportunity has remained largely unexplored for WSe₂ NEMS, impeding exploration of exquisite physical processes and realization of novel device functions. Here, we demonstrate dynamic coupling between atomic lattice vibration and nanomechanical resonances in few-layer WSe₂ NEMS. Using a custom-built setup capable of simultaneously detecting Raman and motional signals, we accomplish cross-scale mode coupling between the THz

SUBMITTER: Xu B 

PROVIDER: S-EPMC11754608 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature