GHz photon-number resolving detection with high detection efficiency and low noise by ultra-narrowband interference circuits  

作　　者：Tingting Shi Yuanbin Fan Zhengyu Yan Lai Zhou Yang Ji Zhiliang Yuan 

机构地区：[1]Beijing Academy of Quantum Information Sciences,Beijing 100193,China [2]Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [3]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Semiconductors》2024年第3期71-75,共5页半导体学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(62250710162 and 12274406);the National Key Research and Development Program of China(2022YFA1405100).

摘　　要：We demonstrate the photon-number resolution(PNR)capability of a 1.25 GHz gated InGaAs single-photon avalanche photodiode(APD)that is equipped with a simple,low-distortion ultra-narrowband interference circuit for the rejection of its background capacitive response.Through discriminating the avalanche current amplitude,we are able to resolve up to four detected photons in a single detection gate with a detection efficiency as high as 45%.The PNR capability is limited by the avalanche current saturation,and can be increased to five photons at a lower detection efficiency of 34%.The PNR capability,combined with high efficiency and low noise,will find applications in quantum information processing technique based on photonic qubits.

关 键 词：single photon avalanche diode(APD) photon number resolution(PNR) detection efficiency 

分 类 号：TN312.7[电子电信—物理电子学]