Full text loading...
Bias dependence spectral responsivity of a broadband QWIP structure which is created by replacing single-QWs in the narrow-band structure by few period superlattices.
Schematic conduction band diagram of a “stack design” broadband QWIP which consists of two stacks of MQW structures designed to respond at two different wavelengths ( and ) within the required broad wavelength band. and , and , and and pairs represent different number of wells, well-doping densities, and barrier thickness in each MQW structure.
Bias voltage dependence spectral responsivity of three different “stack design” QWIPs. (a) Due to unequal impedance of the two stacks, detector SB1 shows spectral tunability with the bias voltage. As shown in (b) and (c), SB2, and SB3 are designed to produce nearly unchanged spectra within the operating bias voltage range.
Schematic conduction band diagram of the “intermix design” of a broadband QWIP consisting of multiple periods of alternatively placed, dissimilar QWs.
Bias voltage dependence of the spectral responsivity of an “intermix design” broadband QWIP.
Design parameters of three different “stack design” broadband QWIPs.
Article metrics loading...