Modeling of optimized cascade of quantum cascade detector operating in far infrared range

Using the theory for electron energy spectrum and oscillator strengths of inter-subband quantum transitions, developed in the model of position-dependent effective mass and rectangular potentials, the geometrical design for the compact cascade of a quantum cascade detector (with a two-well active region) operating in far infrared range is proposed.  The extractor of the cascade is optimized in such a way that the energy steps of its phonon ladder resonate with optical phonon energy, providing effective phonon-assisted tunneling of electrons between the active regions of  cascades.  It is sh