Unveiling the ultrafast optoelectronic properties of 3D Dirac semi-metal Cd3 As2
2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)（2020）
摘要
We employ ultrafast optical-pump terahertz-probe spectroscopy and ultrafast THz emission spectroscopy to investigate the ultrafast charge carrier dynamics in the 3D Dirac semi-metal Cd
3
As
2
. We extract the temperature-dependent electron mobility (16,000cm
2
V
-1
s
-1
at 5K) for Cd
3
As
2
nanowire ensemble. We also demonstrate strong THz emission from both Cd
3
As
2
single crystal and nanowires, whose polarity depends strongly on incident angle and pump polarisation.
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关键词
Cd3As2 single crystal,incident angle,pump polarisation,temperature-dependent electron mobility,ultrafast THz emission spectroscopy,ultrafast charge carrier dynamics,ultrafast optical-pump terahertz-probe spectroscopy,3D Dirac semimetal,nanowires,temperature 5.0 K,Cd3As2
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