Theoretical investigations of population trapping phenomena in atomic four-color, three-step photoionization scheme
Xiao-Yong Lu(卢肖勇) and Ya-Peng Sun(孙亚鹏)
Chin. Phys. B . 2024, (3): 33202 -033202 .  DOI: 10.1088/1674-1056/ad10fc