Boyko I. Theory of active dynamic conductivity of multi-layer resonance tunnel structures

The quantum theory of electrons quasi-stationary states and active dynamic conductivity of open multi-layered resonance tunnel structures is developed. In the frames of the theory, the electron-electron interaction and the interaction with constant electric, magnetic and electromagnetic fields is taken into account. For the examples of the experimentally fabricated quantum cascade lasers and detectors it is shown that only the model of complete cascade, as open resonance tunnel structures, allows to optimize the operation of these nano-devices confidently by the geometrical design of their active bands and to explain the happening physical phenomena.