1. Department of Materials Science and Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
2. Graduate Degree Program of Science and Technology of Accelerator Light Source, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
3. Department of Physics, National Taiwan Normal University, 88 Ting-Chou Road, Taipei 116, Taiwan
4. National Synchrotron Radiation Research Center, Taiwan, 101 Hsin Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
5. Department of Materials Science and Engineering, National Tsing Hua University, 101 Kung-Fu Road, Hsinchu 30013, Taiwan