I-Chun Cheng⁸, Chia-Hung Hsu⁵, David Hsieh⁴, Wei-Cheng Lee³, Guang-Yu Guo^2,7,†, and Wei-Li Lee^1,‡

• ¹Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan
• ²Department of Physics, National Taiwan University, Taipei 10617, Taiwan
• ³Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, USA
• ⁴Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
• ⁵Scientific Research Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
• ⁶Nano Science and Technology, Taiwan International Graduate Program, Academia Sinica and National Taiwan University, Taipei, Taiwan
• ⁷Physics Division, National Center for Theoretical Sciences, Taipei 10617, Taiwan
• ⁸Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan

• ^*These authors contributed equally to this work.
• ^†gyguo@phys.ntu.edu.tw
• ^‡wlee@phys.sinica.edu.tw