Eliade Stefanescu - DYNAMICS OF A SUPER RADIANT DISSIPATIVE SYSTEM OF ELECTRONS TUNNELING IN A MICRO-CAVITY

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  Publication Details (including relevant citation   information):

  Rom. Journ. Phys. 50 (2005) 629-638.

  Abstract:

  We discuss the super-radiant dissipative tunneling of electrons   in a perfectly
  tuned micro-cavity of a p-i-n semiconductor structure with   quantum dots. Our
  description is based on a quantum master equation with   microscopic coefficients,
  depending on two-body potentials, densities of the dissipative   environment states,
  and temperature, that is in accordance with the detailed balance   principle. For this
  system, we obtain Maxwell-Bloch equations with explicit   microscopic dissipative
  coefficients, while taking into account a current that could be   injected in the device,
  and the field dissipation and propagation, that essentially   determine the superradiation
  process. We are especially interested in the absolute values of   the superradiant
  pulse amplitude and in the space and time-distributions as   functions of
  physical characteristics and operation conditions of the system.   Due to the planar
  distribution of the quantum dots, at a low density of these dots   the super-radiant
  exponent is 3, not 2 as it is for a volume distribution. Due to   Rabi oscillations, in an
  under-damped system the super-radiant exponent decreases with the   quantum dot
  density, tending to 1.5. Power densities of the order of those   that could be absorbed
  from Sun at the level of our planet are easily obtained for   realistic values of the
  system parameters and operation conditions.

  Address (URL): http://www.nipne.ro/rjp/2005_50_7-8/0629_0638.pdf

 

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