Observation of plasma waves with anomalously weak damping in a two-dimensional electron system

作者: P. A. Gusikhin , V. M. Murav’ev , I. V. Kukushkin

DOI: 10.1134/S0021364014220068

关键词: PlasmaAbsorption (electromagnetic radiation)ElectronMicrowaveElectromagnetic electron waveAtomic physicsAbsorption spectroscopyWaves in plasmasPhysicsResonance

摘要: The microwave absorption spectra of a stripe two-dimensional electrons in GaAs/AlGaAs heterostructure are investigated using the optical detection absorption. A previously unknown low-frequency microwave-absorption resonance corresponding to excitation weakly damped plasma wave electron system is observed. new mode anomalously narrow, its width being considerably smaller than inverse relaxation time electrons. measured dependences frequency this on density and magnetic field give evidence plasmon-polariton nature.

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