Low-Light-Level Readout Based on Quantum Dots-in-Well Photodetector at Room Temperature
MAO Feng1, WANG Ming-jia2*
1. Electrical and Electronics Engineering, Shanghai Institute of Technology, Shanghai 201418, China
2. College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266042，China
Abstract：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.
茅 丰，王明甲. 一种基于室温工作的量子点光电探测器的微光读出和应用研究[J]. 光谱学与光谱分析, 2019, 39(03): 877-881.
MAO Feng, WANG Ming-jia. Low-Light-Level Readout Based on Quantum Dots-in-Well Photodetector at Room Temperature. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(03): 877-881.
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