University of Science and Technology of China (USTC) - National Synchrotron Radiation Laboratory Research Center, Tamkang University, National Taipei University of Technology, National Taipei University of Technology, National Chiao Tung University, University of Science and Technology of China (USTC) - National Synchrotron Radiation Laboratory Research Center, University of Science and Technology of China (USTC) - National Synchrotron Radiation Laboratory Research Center, Department of Physics, Tamkang University and National Chiao Tung University