1. State Key Laboratory of ASIC and System, Shanghai Institute of Intelligent Electronics & Systems, School of Microelectronics, Fudan University, Shanghai 200433, China
2. School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China
3. Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
4. University of Johannesburg, Aukland Park, Johannesburg 2006, South Africa
5. Department of Electrical and Electronic Engineering, Synchrotron Light Application Center, Saga University, Saga 840-8502, Japan