Theoretical investigations of population trapping phenomena in atomic four-color,three-step photoionization scheme
Theoretical investigations of population trapping phenomena in atomic four-color, three-step photoionization scheme作者机构:Science and Technology on Particle Transport and Separation LaboratoryTianjin 300180China Department of Engineering PhysicsTsinghua UniversityBeijing 100084China
出 版 物:《Chinese Physics B》 (中国物理B(英文版))
年 卷 期:2024年第33卷第3期
页 面:333-340页
核心收录:
学科分类:07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学]
主 题:population trapping metastable state selective photoionization laser bandwidth
摘 要:The four-color three-step selective photoionization process of atom is very important in laser isotope separation *** population trapping phenomena and their influences are studied theoretically in monochromatic and non-monochromatic laser fields based on the density matrix theory in this *** evolutions of the photoionization properties of the four-color,three-step process are *** population trapping effects occur intensely in monochromatic excitation,while it gradually turns weak as the laser bandwidth *** effects of bandwidth,Rabi frequency,time delay,and frequency detuning on the population trapping effect are investigated in monochromatic and non-monochromatic laser *** effects of laser process parameters and atomic parameters on the effective selective photoionization are also *** ionization probability and selectivity factors,as evaluation indexes,are difficult to improve synchronously by adjusting systematic ***,the existence of metastable state may play a negative role when its population is low enough.