Observation of axisymmetric dark plasma excitations in a two-dimensional electron system

Observation of axisymmetric dark plasma excitations in a two-dimensional electron system Resonant microwave absorption of two-dimensional electron systems in AlGaAs/GaAs heterostructures with a single Corbino disk geometry has been studied. Axisymmetric dark plasmon modes have been excited using a near-field excitation technique, and their magnetodispersion have been determined in the presence of a perpendicular magnetic field. Plasma excitations observed have been compared to bright plasmon modes in a single disk of identical geometry. Dark plasmon modes have been found to have considerably longer lifetimes compared to bright plasmon modes due to the inhibition of superradiant losses. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Observation of axisymmetric dark plasma excitations in a two-dimensional electron system

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Observation of axisymmetric dark plasma excitations in a two-dimensional electron system

Abstract

Resonant microwave absorption of two-dimensional electron systems in AlGaAs/GaAs heterostructures with a single Corbino disk geometry has been studied. Axisymmetric dark plasmon modes have been excited using a near-field excitation technique, and their magnetodispersion have been determined in the presence of a perpendicular magnetic field. Plasma excitations observed have been compared to bright plasmon modes in a single disk of identical geometry. Dark plasmon modes have been found to have considerably longer lifetimes compared to bright plasmon modes due to the inhibition of superradiant losses.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.045421
Publisher site
See Article on Publisher Site

Abstract

Resonant microwave absorption of two-dimensional electron systems in AlGaAs/GaAs heterostructures with a single Corbino disk geometry has been studied. Axisymmetric dark plasmon modes have been excited using a near-field excitation technique, and their magnetodispersion have been determined in the presence of a perpendicular magnetic field. Plasma excitations observed have been compared to bright plasmon modes in a single disk of identical geometry. Dark plasmon modes have been found to have considerably longer lifetimes compared to bright plasmon modes due to the inhibition of superradiant losses.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 17, 2017

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