1. School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore, Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hum, Kowloon, Hong Kong, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore, Laboratoire de Minéralogie et Cosmochimie, Muséum National d’Histoire Naturelle, CNRS 7202, CP52, 61 Rue Buffon, 75005 Paris, France, and Division of Physics and Applied Physics, School of...