학술논문
Tracking Electron & Hole Dynamics in 3D Dirac Semimetals
Document Type
Conference
Author
Source
2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) Infrared, Millimeter and Terahertz Waves (IRMMW-THz),2022 47th International Conference on. :1-2 Aug, 2021
Subject
Language
ISSN
2162-2035
Abstract
Using ultrafast optical-pump terahertz-probe spectroscopy (OPTP) and ultrafast terahertz emission spectroscopy, we showcase the electron and hole dynamics in Cd 3 As 2 nanowires (NWs), a well-known 3D Dirac semimetal a subgroup of the newly discovered. A temperature-dependent photoconductivity measurement was carried out yielding an incredibly high electron mobility ~ 16,000 cm 2 /Vs at 5K. Strong THz emission due to helicity-dependent surface photocurrents was also observed for both nanowires and single crystal (SC) which is highly desirable for devices such as THz sources.