Widely tunable single-photon source with high spectral-purity from telecom wavelength to mid-infrared wavelength based on MgO:PPLN  

作　　者：Chang-Wei Sun Yu Sun Jia-Chen Duan Guang-Tai Xue Yi-Chen Liu Liang-Liang Lu Qun-Yong Zhang Yan-Xiao Gong Ping Xu Shi-Ning Zhu 孙昌伟;孙宇;端家晨;薛广太;刘奕辰;陆亮亮;张群永;龚彦晓;徐平;祝世宁(National Laboratory of Solid State Microstructures and School of Physics,Nanjing University,Nanjing 210093,China;Key Laboratory of Optoelectronic Technology of Jiangsu Province,School of Physical Science and Technology,Nanjing Normal University,Nanjing 210023,China;Faculty of Mathematics and Physics,Huaiyin Institute of Technology,Huaian 223003,China)

机构地区：[1]National Laboratory of Solid State Microstructures and School of Physics,Nanjing University,Nanjing 210093,China [2]Key Laboratory of Optoelectronic Technology of Jiangsu Province,School of Physical Science and Technology,Nanjing Normal University,Nanjing 210023,China [3]Faculty of Mathematics and Physics,Huaiyin Institute of Technology,Huaian 223003,China

出　　处：《Chinese Physics B》2021年第10期108-112,共5页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2017YFA0303700 and 2019YFA0308700);the National Natural Science Foundation of China(Grant Nos.11627810 and 11690031)。

摘　　要：By utilizing the extended phase-matching(EPM)method,we investigate the generation of single photons with high spectral-purity in a magnesium-doped periodically-poled lithium niobate(MgO:PPLN)crystal via the spontaneous parametric down-conversion(SPDC)process.By adjusting the temperature and pump wavelength,the wavelength of the single photons can be tuned from telecom to mid-infrared(MIR)wavelengths,for which the spectral-purity can be above 0.95 with high transmission filters.In experiments,we engineer a MgO:PPLN with poling period of 20.35µm which emits the EPM photon pair centered at 1496.6 nm and 1644.0 nm and carry out the joint spectral intensity(JSI)and Glauber’s second-order self-correlation measurements to characterize the spectral purity.The results are in good agreement with the numerical simulations.Our work may provide a valuable approach for the generation of spectrally pure single photons at a wide range of wavelengths which is competent for various photonic quantum technologies.

关 键 词：single photons quantum technologies periodically-poled lithium niobate 

分 类 号：O657.3[理学—分析化学] O413[理学—化学]