基于频谱迁移的红外探测研究进展(特邀)  

Progresses in infrared detection based on spectrum transducing(invited)

作　　者：周志远[1] 史保森[1] Zhou Zhiyuan;Shi Baosen(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学中国科学院量子信息重点实验室,安徽合肥230026

出　　处：《红外与激光工程》2023年第5期1-11,共11页Infrared and Laser Engineering

基　　金：科技部重点研发计划项目(2022YFB3607700,2022YFB3900027);国家自然科学基金(11934013,92065101);科技部科技创新2030-量子科学与科技项目(2021ZD0301100);中国空间碎片研究项目(KJSP2020020202)。

摘　　要：传统的红外探测主要基于铟镓砷、锑镉汞等半导体光子型探测器,然而这类探测器在常温下具有灵敏度低和噪声较大的缺点,高灵敏探测还需要深制冷,相对于成熟的硅探测器性能差距非常大。因此,将不易探测的红外波段转迁移至硅探测器的工作波段,并且利用高性能的硅基探测器进行有效探测是一种可行的路径。基于这种思想,目前发展了一种有效的频谱迁移探测方法,即通过非线性和频上转换过程将红外光子的频谱迁移到硅探测器的探测波段,从而实现高效的探测。文中系统介绍了基于频谱迁移红外探测的基本原理、主要参数和最新研究进展,最后对潜在的研究趋势和应用前景进行了展望。Significance In this paper,spectrum transducing detection of infrared light with silicon detectors is systematic reviewed.Traditional infrared detection is based on semiconductor photonic detectors,such as AsGaIn and HgCdTe.These detectors have low detection sensitivities and relatively high noise at room temperature,and deep cooling is required to get better sensitivity.While the detection performances of silicon detectors are much better than those of the infrared detectors.Therefore,an effective method to detect infrared light is to transfer the wavelength of the infrared light to the detection window of silicon detector.Based on this principle,spectrum transducing detection of infrared light with silicon detectors is developed by using frequency up-conversion via sum frequency generation.This new detection scheme has the potential to offer single photon detection sensitivity at room temperature,which is very promising to be used in remote sensing at infrared regime.Progress The main progress for spectrum transducing detection of infrared light can be divided into two groups.The first group is aimed at improving the key parameters in frequency conversion,which are quantum efficiency,noise,frequency bandwidth and spatial bandwidth.The conversion efficiency in frequency transducing can be enhanced by using cavity and waveguide(Fig.4),both configurations are demonstrated to achieve near unity internal conversion efficiencies;Noise in frequency conversion is mainly caused by spontaneous Raman scattering and parametric down conversion of strong pump beam,which can be measured at different pump configuration,and some effective methods can be used to sufficiently reduce the noise.These methods include:long wavelength pump laser,narrow band filters and reduction of the operation temperature of the nonlinear crystals.The frequency bandwidth is strongly dependent on the phase matching conditions,therefore effective methods such as chirped poling and multi-angle cut crystal can be used to enhance the frequency bandwidth

关 键 词：红外探测 频谱迁移 量子效率 噪声 频率带宽 视场 

分 类 号：O431.2[机械工程—光学工程]