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THz Aperture Near-Field Spectroscopy of Dirac Plasmons in Topological Insulator Bi2Se3

Hale, LL; Wang, Z; Law, S; Brener, I; Mitrofanov, O; (2022) THz Aperture Near-Field Spectroscopy of Dirac Plasmons in Topological Insulator Bi2Se3. In: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). IEEE: Delft, Netherlands. Green open access

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Abstract

We map the dispersion relation in ribbon gratings of topological insulator Bi2Se3 using both far-field and aperture-type near-field THz spectroscopy methods. The results are consistent with theoretical predictions of coupling between the optical phonon and massless Dirac plasmons.

Type: Proceedings paper
Title: THz Aperture Near-Field Spectroscopy of Dirac Plasmons in Topological Insulator Bi2Se3
Event: 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)
Dates: 28 Aug 2022 - 2 Sep 2022
ISBN-13: 9781728194271
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/IRMMW-THz50927.2022.9895794
Publisher version: https://doi.org/10.1109/IRMMW-THz50927.2022.989579...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Couplings, Spectroscopy, Phonons, Apertures, Plasmons, Polaritons, Optical coupling
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10158200
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