1. College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications 1 , Nanjing 210023, China
2. Photonics Research Centre, University of Malaya 2 , 50603 Kuala Lumpur, Malaysia
3. Institute of Advanced Studies (IAS), University of Malaya 3 , 50603 Kuala Lumpur, Malaysia
4. Guangdong Greater Bay Area Institute of Integrated Circuit and System 4 , 510535 Guangzhou, China
5. Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya 5 , 50603 Kuala Lumpur, Malaysia