Vasilyev Yu.B.1
1Ioffe Institute, St. Petersburg, Russia
Email: yu.vasilyev@mail.ioffe.ru
Plasmon excitations in two-dimensional electron systems in an AlGaAs/GaAs heterojunction containing a layer of self-organizing antidots at the heterointerface are experimentally studied. In a magnetic field, in the terahertz absorption spectra obtained by Fourier spectroscopy, along with the cyclotron resonance, a magnetoplasmon mode is observed. With an increase in the magnetic field, an extreme decrease in the width of the magnetoplasmon line occurs, which can be explained by the localization of plasmons by the magnetic field in a random array of antidots. Keywords: plasmon, two-dimensional electron system, array of antidots, heterojunction, cyclotron resonance.
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