Optical charge state manipulation of divacancy spins in silicon carbide under resonant excitation  

作　　者：JUN-FENG WANG JI-YANG ZHOU QIANG LI FEI-FEI YAN MU YANG WU-XI LIN ZE-YAN HAO ZHI-PENG LI ZHENG-HAO LIU WEI LIU KAI SUN YU WEI JIAN-SHUN TANG JIN-SHI XU CHUAN-FENG LI GUANG-CAN GUO 

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]College of Physics,Sichuan University,Chengdu 610065,China [4]Center for Micro-and Nanoscale Research and Fabrication,University of Science and Technology of China,Hefei 230027,China

出　　处：《Photonics Research》2021年第9期1752-1757,共6页光子学研究（英文版）

基　　金：Fundamental Research Funds for the Central Universities(WK2030380017,WK2470000026);Anhui Initiative in Quantum Information Technologies(AHY020100,AHY060300);Science Foundation of the CAS(ZDRW-XH-2019-1);Key Research Program of Frontier Sciences,Chinese Academy of Sciences(CAS)(QYZDY-SSW-SLH003);National Natural Science Foundation of China(11774335,11804330,11821404,11975221,61725504,61905233,U19A2075);National Key Research and Development Program of China(2016YFA0302700,2017YFA0304100)。

摘　　要：Spin defects in silicon carbide(SiC)have attracted much attentions in various quantum technologies.In this work,we study the optical manipulation of charge state and coherent control of multifold divacancy spins ensemble in SiC under resonant excitation.The results reveal that the resonantly excited divacancy ensemble counts have dozens of enhancements by repumping a higher-energy laser.Moreover,it has a similar optimal repump laser wavelength of around 670 nm for multiple divacancies.On the basis of this,the optically detected magnetic resonance(ODMR)experiment shows that repump lasers with different wavelengths do not affect the ODMR contrast and line width.In addition,the repump lasers also do not change the divacancy spins'coherence times.The experiments pave the way for using the optimal repump excitation method for SiC-based quantum information processing and quantum sensing.

关 键 词：PUMP PUMPING RESONANT 

分 类 号：TQ163.4[化学工程—高温制品工业]