1. Department of Physics and Surface Physics Laboratory (National Key Laboratory), Fudan University, Shanghai 200433, China, Department of Electrical and Computer Engineering, Fitzpatrick Institute for Photonics and Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27708, Department of Physics and William Mong Institute of NanoScience and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China, and Department of Electronic and...