1. Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong 999077 P. R. China
2. School of Science and Engineering The Chinese University of Hong Kong Shenzhen 518000 China
3. Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China
4. Frontier Research Institute for Physics South China Normal University Guangzhou 510006 China
5. 3rd Institute of Physics Research Center SCoPE and IQST University of Stuttgart 70569 Stuttgart Germany
6. Max Planck Institute for Solid State Research 70569 Stuttgart Germany
7. School of Biomedical Sciences The University of Hong Kong Hong Kong 999077 P. R. China
8. Advanced Biomedical Instrumentation Centre Hong Kong Science Park Hong Kong 999077 P. R. China