THz microscopy on a single WS2 microcrystal

Stan ter Huurne; Niels van Hoof; Rasmus Godiksen; Sara ElRafey; Alberto G. Curto; Jaime Gómez Rivas

doi:10.1109/IRMMW-THz50926.2021.9567372

THz microscopy on a single WS₂ microcrystal

Stan ter Huurne, Niels van Hoof, Rasmus Godiksen, Sara ElRafey, Alberto G. Curto, Jaime Gómez Rivas

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/Congresprocedure › Conferentiebijdrage › Academic › peer review

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Terahertz time-domain spectroscopy enables the contact-free determination of charge carrier properties in metals and semiconductors. However, the applicability of THz spectroscopy is severely reduced by the low spatial resolution imposed by the diffraction limit. We have developed a time-resolved THz near-field microscope to circumvent this limitation, allowing the determination of the carrier dynamics with a resolution of a few microns. We use this microscope to measure a single exfoliated flake of WS2 with domains of different thickness. The THz spectra reveal phonon modes in the sheet conductance. We also observe a biexponential carrier recombination associated to surface-assisted Auger scattering.

Originele taal-2	Engels
Titel	2021 46th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Uitgeverij	Institute of Electrical and Electronics Engineers
Aantal pagina's	2
ISBN van elektronische versie	978-1-7281-9424-0
DOI's	https://doi.org/10.1109/IRMMW-THz50926.2021.9567372
Status	Gepubliceerd - 20 okt. 2021
Evenement	46th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2021 - Chengdu, China Duur: 29 aug. 2021 → 3 sep. 2021 https://irmmw-thz2021.org/

Congres

Congres	46th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2021
Land/Regio	China
Stad	Chengdu
Periode	29/08/21 → 3/09/21
Internet adres	https://irmmw-thz2021.org/

Bibliografische nota

Publisher Copyright:
© 2021 European Union

Toegang tot document

10.1109/IRMMW-THz50926.2021.9567372

Andere bestanden en links

Link naar publicatie in Scopus

Citeer dit

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title = "THz microscopy on a single WS2 microcrystal",

abstract = "Terahertz time-domain spectroscopy enables the contact-free determination of charge carrier properties in metals and semiconductors. However, the applicability of THz spectroscopy is severely reduced by the low spatial resolution imposed by the diffraction limit. We have developed a time-resolved THz near-field microscope to circumvent this limitation, allowing the determination of the carrier dynamics with a resolution of a few microns. We use this microscope to measure a single exfoliated flake of WS2 with domains of different thickness. The THz spectra reveal phonon modes in the sheet conductance. We also observe a biexponential carrier recombination associated to surface-assisted Auger scattering.",

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ter Huurne, S, van Hoof, N, Godiksen, R, ElRafey, S , Curto, AG & Rivas, JG 2021, THz microscopy on a single WS₂ microcrystal. in 2021 46th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)., 9567372, Institute of Electrical and Electronics Engineers, 46th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2021, Chengdu, China, 29/08/21. https://doi.org/10.1109/IRMMW-THz50926.2021.9567372

THz microscopy on a single WS₂ microcrystal. / ter Huurne, Stan; van Hoof, Niels; Godiksen, Rasmus et al.
2021 46th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Institute of Electrical and Electronics Engineers, 2021. 9567372.

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/Congresprocedure › Conferentiebijdrage › Academic › peer review

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AB - Terahertz time-domain spectroscopy enables the contact-free determination of charge carrier properties in metals and semiconductors. However, the applicability of THz spectroscopy is severely reduced by the low spatial resolution imposed by the diffraction limit. We have developed a time-resolved THz near-field microscope to circumvent this limitation, allowing the determination of the carrier dynamics with a resolution of a few microns. We use this microscope to measure a single exfoliated flake of WS2 with domains of different thickness. The THz spectra reveal phonon modes in the sheet conductance. We also observe a biexponential carrier recombination associated to surface-assisted Auger scattering.

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