Liang Li,ab Jian Liu,*a Yan Liu,a Chenguang Liu,*ab He Zhang,a Xiaoyu You,a Kang Gu,a Yuhang Wangab and Jiubin Tana
a Center of Ultra-Precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin, China
b Research Center of Basic Space Science, Harbin Institute of Technology, Harbin, China