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A detector with five bands covering visible to long-wave infrared is demonstrated using a GaAs-based n-p-n-architecture. The major elements are two back-to-back connected p-i-n photodiodes with InGaAs/GaAs and GaAs/AlGaAs-based quantum wells integrated within the n-regions. At 80 K, a preliminary detector shows two combinations of bands, each responding in three bands, covering the 0.6\u20130.8, 3\u20134, and 4\u20138 um ranges and the 0.8\u20130.9, 0.9\u20131.0, and 9\u201313 um ranges. A good selection of these two combinations based on the bias voltage polarity is observed. A similar four-band detector without any cross-talk between the bands is proposed using In0.53Ga0.47As/InP material system.Peer reviewed: YesNRC publication: Ye

Five-band bias-selectable integrated quantum well detector in an n-p-n architecture