载流子漂移时电场的热涨落
Thermal Fluctuations of the Electric Field in the Presence of Carrier Drift
摘要：
我们考虑一个半导体在一个非平衡的稳定状态，与直流电流。在静止的载体运动之上，存在波动。示出了载体的静止运动（即，它们的漂移）可以对样品体中以及样品外部靠近表面的电磁场波动（近场中的倏逝波）具有深远的影响。这种效应在等离子体频率附近特别明显。这是因为漂移导致体和表面等离子体激元的色散关系的显著修改。
英文摘要：
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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