High gain-adaptive readout of light-sensitive quantum dots photodetectors array

• 作 者: WangWei;LuHaidong;GuoFangmin;
• 机 构: Shanghai Key Laboratory of Multidimensional Information Processing Laboratory of polar Materials & D
• 出 处: 2016年上海市研究生学术论坛——电子科学与技术
• 发表日期: 2016年期

　　We discuss the readout of a kind of novel 64-pixel quantum dots photodetector array which has high current gains but low dark currents and thus has high signal to noise ratio.Photocurrent spectrum tests demonstrated that the photodetector shows excellent light absorption from 600nm to 900nm both in room temperature (300K) and cooled down environment (77K by liquid nitrogen).High gain-adaptive capacitive trans-impedance amplifier (CTIA) readout circuit has been designed to acquire photocurrents.Different integration capacitors were designed to suit for both weak and strong light environments.In weak light detection, there were 2mV voltage response in 10-13W@300K and 4mV in [e-mail] responsivities were 2× 1010V/W and 4× 1011V/W respectively.