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Drastic Reduction of Plasmon Damping in Two-Dimensional Electron Disks
P A Gusikhin1, V M Muravev1, A A Zagitova1
1Institute of Solid State Physics, RAS, Chernogolovka 142432, Russia.
Abstract:
In this Letter, plasmon damping has been investigated using resonant microwave absorption of two-dimensional electrons in disks with different diameters. We have found an unexpected drastic reduction of the plasmon damping in the regime of strong retardation. This finding implies large delocalization of the retarded plasmon field outside the plane of the two-dimensional electron system. A universal relationship between the damping of plasmon polariton waves and the retardation parameter is reported.
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