偏振集成红外光电探测器研究进展与应用

Overview: As one of the important platforms of the fourth generation new photoelectric imaging technology, the polarization integrated detector can simultaneously obtain multi-dimensional information such as the intensity and polarization of infrared radiation, and has the advantages of small size and high reliability. It is the development direction of the future infrared polarization imaging system. We first introduce the concept and research progress of the polarization integrated detectors, from the earliest regional polarization integrated detectors to pixel level polarization integrated detectors, and from the linear polarization integrated detectors to the focal planar array polarization integrated detectors. The second part mainly introduces the key technologies of the polarization integrated detector, mainly including the integrated structure design and the influence of related parameters on device performance, the method of the submicron polarization grating structure integration process, and the performance testing system. The third part mainly introduces the pseudo color image reconstruction method of the polarization integrated detector imaging and its application to typical targets in complex scenes. The last part introduces the new progress of the long-wave infrared polarization focal plane of Shanghai Institute of Technical Physics.

Infrared polarization imaging shows great advantages based on the application requirements in some scenarios, but it also faces the huge challenge of reducing the signal-to-noise ratio and the spatial resolution caused by halving the received radiation energy. It needs to make continuous efforts to break through the existing technical bottlenecks in both hardware and software. In terms of the performance of polarization integrated devices, it is necessary to continue to improve the extinction ratio of the polarization integrated detector by cooperating with the metasurface structure to control the light field. In the aspect of image reconstruction and fusion, it is necessary to clarify the polarization characteristics of the target and background and the transmission characteristics of polarization through the polarization coding algorithm, and reflect its important value of significantly improving the signal-to-background ratio in the imaging detection of typical targets in relevant application scenarios.