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(a)Structural schematic of the MWIR T2SL cascade detector, “P” stands for Periods. (b) Calculated energy band-diagram of cascade detector demonstrating flow of photo-generated carriers and band alignments of different segments. The band offsets of different layers have been obtained by empirical pseudopotential method.
Measured photocurrent signal of MWIR T2SL cascade detector as a function of temperature.
(a) Dark current density as a function of bias for different temperatures. (b) Arrhenius plot of dark current density with temperature to calculate the activation energies in different temperature regimes.
Measured responsivity, measured specific detectivity with 2π FOV (300 K background) and Johnson noise limited detectivity as a function of temperature.
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