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(Color online) Schematic illustrations of the energy dispersions and energy band diagrams of (a) FIR/terahertz QWIP; (b) QWISP showing intersubband and impurity scattering assisted intrasubband optical absorption and carrier extraction mechanisms.
(Color online) Calculated quantum well absorption coefficients for structures listed in Table I. The QWIP (set P) results are for side-incidence (-polarized) radiation only. The QWISP (set S) results for both normal-incidence (averaged over and polarizations) and side-incidence radiations are shown.
(Color online) Low-temperature FIR/terahertz QWIP (set P) side-incidence responsivity and QWISP (set S) normal-incidence responsivity. Modeling parameters are listed in Table I.
QWIP (set P) and QWISP (set S) structure and simulation parameters, and calculated activation energies and responsivity peak positions.
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