학술논문
Mapping the ultrafast charge transfer in van der Waals heterostructures
Document Type
Conference
Author
Source
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2020 45th International Conference on. :01-02 Nov, 2020
Subject
Language
ISSN
2162-2035
Abstract
We employ THz near-field microscopy to investigate ultrafast interlayer charge transfer in van der Waals heterostructures (HS) by tracing the resulting THz emission on the nanoscale. We further employ a novel concept of contact-free tunneling microscopy to monitor the interlayer electron-hole (e-h) pair population through its build up and decay, providing access to the ultrafast carrier dynamics with spatial resolution orders of magnitude better than the diffraction limit.