针对量子点光电探测器线列进行微光检测研究, 量子点探测器采用AlAs/GaAs/AlAs双势垒结构, GaAs宽阱中分别有一个InAs量子点 (QDs) 和In0.15Ga0.85As量子阱 (QW), 建立一个简单的器件模型进行分析.常温下, 在632.8 nm He-Ne激光照射下, 当光功率为0.01 pW时, 器件偏压-0.5 V, 积分时间80.2μs, 电压响应率达到7.0×1011 V·W-1, 具有非常高的灵敏度, 这种光电探测器在300 K温度下可以探测光功率小于10-14 W极弱光.以这种量子点光电探测器为核心研制的高灵敏度光谱仪和分子超光谱系统结合对生物组织样本进行检测, 研制了一种图谱相互验证, 互为校正的生物组织光谱测量系统.%In this paper, the photoluminescence detection of quantum dot photodetector arrays is studied. The quantum dot detector adopts AlAs/GaAs/AlAs dual-barrier structure. In the wide GaAs well, there are InAs quantum dots (QDs) and In0.15Ga0.85As quantum Well (QW), and a simple device model for analysis is built. Under the irradiation of 632.8 nm He-Ne laser at room temperature, when the optical power is 0.01 pW and the bias voltage of the device is-0.5 V, the integration time is 80.2 μs and the voltage response rate is 7.0×1011 V·W-1, which has a very high sensitivity. At the temperature of 300 K, this quantum dot detector can detect the very weak light whose power is less than 10-14 W. The high-sensitivity spectrometer and molecular hyperspectral system developed with this kind of quantum dot photodetector are used to detect biological tissue samples. A spectroscopic system for mutual verification and mutual calibration of biological tissues is developed.
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