Dicke Superradiance in a magnetoplasma

Details Dicke Superradiance in a magnetoplasma Dicke Superradiance in a magnetoplasma

1999-08-30

arxiv.org/abs/cond-mat/9908448v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Proc. of HCIS-11, Kyoto(Japan), July 19-23 1999. To appear in Physica B

Scientific paper

10.1016/S0921-4526(99)00301-4

We present theoretical results for superradiance, i.e. the collective coherent decay of a radiating system, in a semiconductor heterostructure under a strong quantizing magnetic field. We predict a strong peak (`Dicke-peak') in the emission intensity as a function of time, which should be observable after a short initial excitation of electrons into the conduction band. This peak has a characteristic dependence on the magnetic field and should be observable on sub-picosecond time scales. Furthermore, pumping of electrons and holes into the systems at a rate T leads to a novel kind of oscillations with frequency $\sim \sqrt{T}$ in the limit of the lowest Landau level.

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