摘要
在理论上介绍了用非相干光和相干的激光脉冲实现二能级或三能级原子或分子能态间转移的各种方法,包括光泵浦,受激辐射泵浦,共振相干激发,受激拉曼绝热过程(STIRAP),并在转移的效率和转移速度等方面进行了比较,指出适当运用相干脉冲序列转移粒子数要优于非相干脉冲,特别是受激拉曼绝热过程(STIRAP),可以实现粒子数的完全快速转移.
It introduced several methods to transfer population, including two- level system and three-level system, and gave some comparisons on transfer efficiency and transfer velocity of them in theory. It is shown that population transfer by coherent pulse sequence is better than incoherence one. Numerical simulation results showed that when using Stimulated Raman Adiabatic Rapid Passage （STIRAP）, in which the pump laser pulse fully overlaps the Stokes pulse with the Stokes preceding the pump, population can be transferred completely and rapidly, Robust control ofpopulation transfer among Zeeman sublevels in the ground states of three-level system is investigated using adiabatic rapid passage in theory. The laser pulse widths are supposed to be short compared to the lifetime of the excited level, which means adiabatic. We demonstrated that techniques of STIRAP can be found to optimize population transfer in the ground states of three-level A system.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2007年第5期1009-1013,共5页
Journal of Atomic and Molecular Physics
基金
浙江大学宁波理工学院教学基金(21002545403)
关键词
量子光学
粒子数转移
数值计算
受激拉曼绝热过程
转移效率
三能级
quantum optics, population transfer, numerical simulation, STIRAP, transfer efficiency, three- level system
