M. Ming,1,2,* J.-H. Wang,4 J.-Y. Zhang,1 and J.-J. Zhang1,2,3 (1 Songshan lake materials laboratory, Dongguan, Guangdong, China2 Institute of Physics, Beijing, China3 Hefei National Laboratory, Hefei, Anhui, China4 Beijing Academy of Quantum Information Sciences, Beijing, China)

Md Tauhidul ISLAM,1,* and Masashi AKABORI1 (1 School of Materials Science (SMS) and Center for Nano Materials and Technology (CNMT), Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan)

Changkun Song, Jiawei Yang, Yingxin Chen, Ying Yu* (State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, China)

Likun Ai*, Fangkun Tian, Anhuai Xu, Hua Huang, Jiaxing Zhang, Ming Qi (State Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 865 Changning Road, Shanghai 200050 China)

Chaoyuan Yang,1 Yingxin Chen,1 Kun Zhan,1 and Ying Yu1* (1 State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510006, China)

Shuaicheng Liu,1 Hao Liu,1,* Chen Jiang,1 Jihong Ye,1 Hao Zhai,1 Jian Li,2 Jun Wang,1 Qi Wang,1 Xin Wei2 and Xiaomin Ren1 (1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China2 Laboratory of Nano Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China)

S. Taniguchi,1,* K. Nakaoka,1 T. Uehara,1 J. Inajima,1 Y. Teramura,1 K. Tsujimoto,1 S. Honda,1 and M. Higashiwaki1,2,* (1 Department of Physics and Electronics, Osaka Metropolitan University, Sakai, Osaka, Japan2 National Institute of Information and Communications Technology, Koganei, Tokyo, Japan)

J. Kaupp,* Y. Reum, G. Peniakov, Q. Buchinger, J. Michl, M. Kamp,T. Huber-Loyola, A. Pfenning, and S. Höfling (Julius-Maximilians-Universität Würzburg, Physikalisches Institut, Technische Physik, Am Hubland, D-97074 Würzburg, Germany)

Haruto Okuizumi1,* Ronel Christian I. Roca,1 and Itaru Kamiya1,* (1 Toyota Technological Institute, Nagoya, Aichi, Japan)