Thermal Fluctuations of the Electric Field in the Presence of Carrier Drift

Details Thermal Fluctuations of the Electric Field in the Presence of Carrier Drift Thermal Fluctuations of the Electric Field in the Presence of Carrier Drift

2010-04-17

arxiv.org/abs/1004.2969v1

Physics

Condensed Matter

Other Condensed Matter

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Scientific paper

We consider a semiconductor in a non-equilibrium steady state, with a dc current. On top of the stationary carrier motion there are fluctuations. It is shown that the stationary motion of the carriers (i.e., their drift) can have a profound effect on the electromagnetic field fluctuations in the bulk of the sample as well as outside it, close to the surface (evanescent waves in the near field). The effect is particularly pronounced near the plasma frequency. This is because drift leads to a significant modification of the dispersion relation for the bulk and surface plasmons.

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