Tunable deep ultraviolet laser based near ambient pressure photoemission electron microscope for surface imaging in the millibar regime 

Yanxiao Ning, Yifan Li, Chao Wang, Rongtan Li, Fengfeng Zhang, Shenjin Zhang, Zhimin Wang, Feng Yang, Nan Zong, Qinjun Peng, Zuyan Xu, Xiaoyang Wang, Kukang Li, M. Breitschaft, S. Hagen, Qiang Fu* , Xinhe Bao*