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Dependence of the performance of GaAs/AlGaAs quantum well infrared photodetectors on doping and bias (1991)

Gunapala, S. D. ; Levine, B. F. ; Pfeiffer, L. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 69 (1991), S. 6517-6520

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: We have measured and theoretically analyzed the doping density, ND, dependence of the intersubband absorption coefficient α, the quantum efficiency η, the optical gain g, the dark current ID, and the detectivity D*. We discuss the optimum doping and show that D* depends only weakly on both ND and also the bias voltage, Vb. In particular, we find that the dark current can be reduced by three orders of magnitude, without significantly reducing the detectivity. This would substantially alleviate the undesirable filling of imaging array multiplexer storage capacitors, thereby allowing longer integration times and thus higher sensitivity.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.348861

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