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(a) Material layer structure and (b) energy-band diagram of the voltage tunable four-color QWIP.
Spectral responsivity of (a) the SL1∕SL2 stack and (b) the SL3∕SL4 stack of 45° edge-coupled detector at 10 K for different .
Dark current density (solid lines) and background photocurrent density (dashed line) of (a) the SL1∕SL2 stack and (b) the SL3∕SL4 stack.
Measured (solid curves) and the calculated (dashed curves) photoresponse spectra of the detector.
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