TY - RPRT TI - Direct visualization of electromagnetic wave dynamics by laser-free ultrafast electron microscopy AU - Fu, Xuewen AU - Wang, Erdong AU - Zhao, Yubin AU - Liu, Ao AU - Montgomery, Eric AU - Gokhale, Vikrant J. AU - Gorman, Jason J. AU - Jing, Chunguang AU - Lau, June W. AU - Zhu, Yimei PY - 2020 DO - 10.1126/sciadv.abc3456 UR - https://www.osti.gov/biblio/1669728 ID - 1669728 ER -