Compact generation scheme of path–frequency hyperentangled photons using 2D periodical nonlinear photonic crystal

作     者：陈洋河 季波 李念芹 姜震 李维 李昱东 冯梁森 武腾飞 何广强 Yang-He Chen;Bo Ji;Nian-Qin Li;Zhen Jiang;Wei Li;Yu-Dong Li;Liang-Sen Feng;Teng-Fei Wu;Guang-Qiang He

作者机构：SJTU Pinghu Institute of Intelligent OptoelectronicsDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Science and Technology on Metrology and Calibration LaboratoryChangcheng Institute of Metrology&MeasurementAviation Industry Corporation of ChinaBeijing 100095China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2023年第32卷第12期

页      面：256-262页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Project supported by the Key-Area Research and Development Program of Guangdong Province of China (Grant No.2018B030325002) the National Natural Science Foundation of China (Grant No.62075129) the Open Project Program of SJTU-Pinghu Institute of Intelligent Optoelectronics (Grant No.2022SPIOE204) the Science and Technology on Metrology and Calibration Laboratory (Grant No.JLJK2022001B002) the Sichuan Provincial Key Laboratory of Microwave Photonics (Grant No.2023-04) 

主　　题：hyperentanglement nonlinear photonic crystal quasi-phase-matching 

摘      要：Hyperentanglement is a promising resource for achieving high capacity quantum ***,we propose a compact scheme for the generation of path-frequency hyperentangled photon pairs via spontaneous parametric down-conversion(SPDC)processes,where six different paths and two different frequencies are covered.A two-dimensional periodicalχ^((2))nonlinear photonic crystal(NPC)is designed to satisfy type-Ⅰquasi-phase-matching conditions in the plane perpendicular to the incident pump beam,and a perfect phase match is achieved along the pump beam s direction to ensure high conversion efficiency,with theoretically estimated photon flux up to 2.068×10^(5) pairs·s^(-1)·mm^(-2).We theoretically calculate the joint-spectral amplitude(JSA)of the generated photon pair and perform Schmidt decomposition on it,where the resulting entropy S of entanglement and effective Schmidt rank K reach 3.2789 and 6.4675,*** hyperentangled photon source scheme could provide new avenues for high-dimensional quantum communication and high-speed quantum information processing.