Observation of axisymmetric dark plasma excitations in a two-dimensional electron system
| Autor: | V. M. Muravev, S. I. Gubarev, I. V. Andreev, V. N. Belyanin, I. V. Kukushkin |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Physics::Optics Heterojunction Astrophysics::Cosmology and Extragalactic Astrophysics 02 engineering and technology Plasma Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Excited state 0103 physical sciences Atomic physics 010306 general physics 0210 nano-technology Absorption (electromagnetic radiation) Excitation Plasmon Microwave |
| Zdroj: | Physical Review B. 96 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.96.045421 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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