1. Tsinghua‐Berkeley Shenzhen Institute (TBSI) Tsinghua University Shenzhen Guangdong 518055 P. R. China
2. Department of Electrical Engineering University of Jeddah 285, Dhahban 23881 Saudi Arabia
3. Department of Electrical Engineering and Department of Chemistry University of Southern California Los Angeles California 90089 USA
4. Department of Electrical Engineering King Abdulaziz University Abdullah Sulayman Street Jeddah 22254 Saudi Arabia