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- W2069251758 abstract "In this article, we report on the growth by molecular beam epitaxy of a series of modulation-doped AlGaAs/AlAs/GaAs structures designed to work as quantum well infrared photodetectors in the 3–5 μm transmission atmospheric window. Growth conditions based on particular aspects of the surface reconstructions observed in the constituent layers are used. The performance of the modulation doped samples is analyzed by a number of characterization techniques and compared with that of a detector with doping in the well and otherwise the same structure. Responsivity measurements performed at various bias voltages reveal a strong photovoltaic behavior of the detectors. The value of the zero volts responsivity and of the external voltage required to quench the photovoltaic signal are highly dependent on the doping profile. A controlled photovoltaic operation may then be achieved by a proper design of the dopant location." @default.
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- W2069251758 date "2003-03-01" @default.
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- W2069251758 title "Growth and characterization of modulation-doped double barrier quantum well infrared photodetectors" @default.
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- W2069251758 doi "https://doi.org/10.1116/1.1562643" @default.
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