Terahertz Spectroscopy to Unveil Intraband Scattering in Photoexcited Graphene

Kar, S and Adeyemo, SO and Sood, AK and Joyce, HJ (2019) Terahertz Spectroscopy to Unveil Intraband Scattering in Photoexcited Graphene. In: 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019, 1 - 6 September 2019, Paris.

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Abstract

Intraband scattering dynamics of optically excited graphene has been explored by using time resolved terahertz spectroscopy. The results for different forms of graphene in terms of layers, Fermi energy position, hydrogen functionalization have been discussed and explained by using Boltzmann transport theory. It is shown how the short-range and Coulomb scattering play important roles in determining photo-induced terahertz conductivity. While photoexcited single layer graphene showed completely negative photoinduced terahertz conductivity (the real part), photoexcited bilayer graphene showed transition from negative to positive in the spectral range 0.5-2.5 THz. © 2019 IEEE.

Item Type:	Conference Paper
Publication:	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Publisher:	IEEE Computer Society
Additional Information:	The copyright for this article belongs to IEEE Computer Society
Keywords:	Graphene; Statistical mechanics; Terahertz waves, Bilayer Graphene; Boltzmann transport theory; Coulomb scattering; Energy position; Functionalizations; Intraband scattering; Spectral range; Time-resolved, Terahertz spectroscopy
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	07 Jan 2023 04:55
Last Modified:	07 Jan 2023 04:55
URI:	https://eprints.iisc.ac.in/id/eprint/78842

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