1. Department
of Materials Science and Engineering, Henry Samueli School of Engineering
and Applied Science, University of California Los Angeles, Los Angeles, California 90095, United States
2. Department
of Electronics Science and Engineering, State Key Laboratory on Integrated
Optoelectronics, Jilin University, Changchun 130012, China
3. Department
of Industrial and Manufacturing Engineering, High-Performance Materials
Institute, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida 32310, United States