Wei-Hua Wang

• Fabrication of low-dimensional nano-devices such as graphene field-effect transistors and their transport properties and applications
• Spin-dependent transport properties in materials with low spin-orbit coupling such as graphene and carbon nanotubes

Dr. Wei-Hua Wang leads a research team investigating the electron transport and optoelectronic properties of nanoscale devices based on two-dimensional (2D) materials. Exploiting on the diverse physical characteristics

of 2D semiconductors and the unique opportunities provided by Van der Waals heterostructures, the group explores novel physics and potential applications unattainable with conventional materials. A primary objective is developing advanced device fabrication techniques that leverage the atomic-scale thickness and lateral bonding of these materials for next-generation nanoelectronics. Specifically, the team has demonstrated enhanced performance in 2D semiconductor field-effect transistors through edge metal contacts, which facilitate complete channel encapsulation. To address the challenges of interface analysis, they innovated a directional angular etching technique that effectively characterizes the chemical states at the metal-semiconductor interface, a critical advancement for optimizing device contacts. Beyond transport, the research delves into novel optoelectronic properties, identifying strong exciton-phonon coupling in monolayer semiconductors to manipulate dark excitons. By precisely controlling material composition and structural architecture, the team aims to bridge the gap between fundamental physical studies and practical applications in high-performance electronic and optoelectronic devices.

• B.S., 1995, National Taiwan University, Taiwan
• M.S., 1999, National Taiwan University, Taiwan
• Ph.D., 2005, Pennsylvania State University, USA

• Postdoctoral researcher, University of California at Riverside (2005-2008)
• Assistant Research Fellow, IAMS, Academia Sinica (2008-2016)
• Associate Research Fellow, IAMS, Academia Sinica (2016- present)