Discovery of Two-Dimensional Electromagnetic Plasma Waves

We report the experimental discovery of "superluminal" electromagnetic 2D plasma waves in the electromagnetic response of a high-quality GaAs/AlGaAs two-dimensional electron system on a dielectric substrate. We measure the plasma wave spectrum on samples with different electron density. It...

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Veröffentlicht in:Physical review letters 2021-04, Vol.126 (13), p.136801-136801, Article 136801
Hauptverfasser: Shuvaev, A, Muravev, V M, Gusikhin, P A, Gospodarič, J, Pimenov, A, Kukushkin, I V
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Sprache:eng
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Zusammenfassung:We report the experimental discovery of "superluminal" electromagnetic 2D plasma waves in the electromagnetic response of a high-quality GaAs/AlGaAs two-dimensional electron system on a dielectric substrate. We measure the plasma wave spectrum on samples with different electron density. It is established that, at large two-dimensional densities, there is a strong hybridization between the plasma and the Fabry-Perot light modes. In the presence of a perpendicular magnetic field, the plasma resonance is shown to split into two modes, each corresponding to a particular sense of circular polarization. Experimental results are found to be in good agreement with the theory.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.126.136801