10-14W weak light readout for quantum photodetector array at 300K

Wei Wang; Shuhua Zhang; Haidong Lu; Peng Xu; Fangmin Guo

doi:10.1117/12.2199825

15 October 2015 10^-14W weak light readout for quantum photodetector array at 300K

Wei Wang, Shuhua Zhang, Haidong Lu, Peng Xu, Fangmin Guo

Proceedings Volume 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology; 96741Z (2015) https://doi.org/10.1117/12.2199825
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

The novel photodetector array has a specific inner multiplication mechanism at low bias voltage in the weak light environment. High current gains are achieved and accompanied by extremely low dark currents. The photocurrent spectrum of the photodetector shows excellent light absorption in visible spectrum (VIS) and near infrared spectrum (NIRS), ranging from 500nm up to 900nm. Capacitor feedback trans-impedance amplifier (CTIA) readout circuit has been designed to acquire the integration voltage of photocurrent with wide wavelength range. Weak light experiments have measured the response voltage is 4mV@0.01pW illumination and 100μs integration time at 300K. The responsivity reaches 4×10¹¹V/W. A high sensitivity spectrometer based on the photodetector array and readout circuit is developing and will be applied to weak signal detection in the fields of the environmental monitoring and biomedicine science.

Citation Download Citation

Wei Wang, Shuhua Zhang, Haidong Lu, Peng Xu, and Fangmin Guo "10^-14W weak light readout for quantum photodetector array at 300K", Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 96741Z (15 October 2015); https://doi.org/10.1117/12.2199825

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