Tracking Electron & Hole Dynamics in 3D Dirac Semimetals

Jessica Boland

doi:10.1109/irmmw-thz50926.2021.9567041

Abstract

Using ultrafast optical-pump terahertz-probe spectroscopy (OPTP) and ultrafast terahertz emission spectroscopy, we showcase the electron and hole dynamics in Cd ₃As 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.

Original language	English
Pages	1-2
Number of pages	2
DOIs	https://doi.org/10.1109/irmmw-thz50926.2021.9567041
Publication status	Published - 20 Oct 2021

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10.1109/irmmw-thz50926.2021.9567041

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title = "Tracking Electron & Hole Dynamics in 3D Dirac Semimetals",

abstract = "Using ultrafast optical-pump terahertz-probe spectroscopy (OPTP) and ultrafast terahertz emission spectroscopy, we showcase the electron and hole dynamics in Cd 3As 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. ",

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AB - Using ultrafast optical-pump terahertz-probe spectroscopy (OPTP) and ultrafast terahertz emission spectroscopy, we showcase the electron and hole dynamics in Cd 3As 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.

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Tracking Electron & Hole Dynamics in 3D Dirac Semimetals

Abstract

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Terahertz, Topology, Technology: Realising the potential of nanoscale Dirac materials using near-field terahertz spectroscopy

Terahertz lights up the nanoscale: Exposing the ultrafast dynamics of Dirac systems via near-field terahertz spectroscopy

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Tracking Electron & Hole Dynamics in 3D Dirac Semimetals

Abstract

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Terahertz, Topology, Technology: Realising the potential of nanoscale Dirac materials using near-field terahertz spectroscopy

Terahertz lights up the nanoscale: Exposing the ultrafast dynamics of Dirac systems via near-field terahertz spectroscopy

Cite this