Parametric amplification of magnetoplasmons in semiconductor quantum dots

Details Parametric amplification of magnetoplasmons in semiconductor quantum dots Parametric amplification of magnetoplasmons in semiconductor quantum dots

2011-08-03

arxiv.org/abs/1108.0891v3

Phys. Rev. B 84, 125441 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 5 figures; published version

Scientific paper

10.1103/PhysRevB.84.125441

We show that the magnetoplasmon collective modes in quasi-two-dimensional semiconductor quantum dots can be parametrically amplified by periodically modulating the magnetic field perpendicular to the nanostructure. The two magnetoplasmon modes are excited and amplified simultaneously, leading to an exponential growth of the number of bosonic excitations in the system. We further demonstrate that damping mechanisms as well as anharmonicities in the confinement of the quantum dot lead to a saturation of the parametric amplification. This work constitutes a first step towards parametric amplification of collective modes in many-body fermionic systems beyond one dimension.

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