Author Affiliations

Haoliang Qian,¹ Yaoguang Ma,² Qing Yang,^1,* and Zhong Lin Wang^3,4,*

¹State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, P. R. China

²State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, P. R. China

³School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332-0245, United States

⁴Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100085, P. R. China

^*Corresponding author: qingyang@zju.edu.cn, zhong.wang@mse.gatech.edu