1. Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190 China
2. CAS Center for Excellence in Topological Quantum Computation and School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049 China
3. Key Laboratory of Luminescence and Optical InformationMinistry of EducationBeijing Jiaotong UniversityBeijing 100044 China
4. Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic SystemsSchool of Materials Science & EngineeringBeijing Institute of TechnologyBeijing 100081 China
5. Songshan Lake Materials LaboratoryDongguan Guangdong 523808 China