1. Joint Key Laboratory of the Ministry of EducationInstitute of Applied Physics and Materials EngineeringUniversity of Macau Macao SAR 999078 China
2. Department of Electromechanical EngineeringFaculty of Science and TechnologyUniversity of Macau Macao SAR 999078 China
3. Department of Materials Science and EngineeringSouthern University of Science and Technology Shenzhen 518055 China
4. School of Physics and Electronic EngineeringGuangzhou University Guangzhou 510006 China
5. Department of Physics and ChemistryFaculty of Science and TechnologyUniversity of Macau Macao SAR 999078 China
6. Department of PhysicsNational University of Singapore Singapore 119077 Singapore