Single photon?InGaAs photodetector
With the rapid development of LiDAR, the?light detection?technology and ranging technology used for automatic vehicle tracking imaging technology also have higher requirements, the sensitivity and time resolution of the detector used in the traditional low light detection technology can not meet the actual needs. Single photon is the smallest energy unit of light, and the detector with the ability of single photon detection is the final tool of low light detection. Compared with InGaAs?APD photodetector, single-photon detectors based on InGaAs APD photodetector have higher response speed, sensitivity and efficiency. Therefore, a series of researches on IN-GAAS APD photodetector single photon detectors have been carried out at home and abroad.
Researchers from the University of Milan in Italy first developed a two-dimensional model to simulate the transient behavior of a single photon?avalanche photodetector?in 1997, and gave numerical simulation results of the transient characteristics of a single photon avalanche photodetector. Then in 2006, the researchers used MOCVD to prepare a planar geometric?InGaAs APD photodetector?single photon detector, which increased the single-photon detection efficiency to 10% by reducing the reflective layer and enhancing the electric field at the heterogeneous interface.
In 2014, by further improving the zinc diffusion conditions and optimizing the vertical structure, the single-photon detector has a higher detection efficiency, up to 30%, and achieves a timing jitter of about 87 ps. In 2016, SANZARO M et al. integrated the InGaAs APD photodetector single-photon detector with a monolithic integrated resistor, designed a compact single-photon counting module based on the detector, and proposed a hybrid quench method that significantly reduced avalanche charge, thereby reducing post-pulse and optical crosstalk, and reducing timing jitter to 70 ps. At the same time, other research groups have also carried out research on InGaAs APD?photodetector?single photon detector.
#Optical?#photonics #semiconductor #Optics?#opticalcenter #SiliconPhotonics #photodetectors #optomechanics?#laser
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