Controling Rydberg Systems with Microwaves

用微波控制里德伯系统

• 批准号: 0555491
• 负责人: Thomas Gallagher
• 金额: --
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0555491&HistoricalAwards=false
• 关键词: Controling; Rydberg; Systems; Microwaves

This experimental research program has two goals. The first is to conduct experiments to understand ionization of highly excited, or Rydberg atoms by strong microwave fields at or above the orbital frequency of the valence electron in the Rydberg atom, and, secondly, manipulate the Rydberg atoms with somewhat weaker microwave fields. The objective in the first part of the project is to link ionization of atoms by low frequency electromagnetic fields to ionization by high frequency fields. In the former case the slowly varying electromagnetic field distorts the atomic potential, allowing the electron to escape. In the latter a photon is absorbed. The objective in the second part of the project is to manipulate the orbital frequency of the electron. The experiments will be carried out using atomic beams of alkali atoms. The atoms are excited to Rydberg states using pulsed dye lasers, and after the laser excitation they are exposed to a microwave pulse. The effect of the microwave pulse is determined by analyzing the final states, either by state selective field ionization of bound atoms or measuring the fraction of atoms ionized. The broader impact of the program involves education as well as applications to other fields.

这项实验研究计划有两个目标。 第一个是进行实验，以了解高激发，或里德伯原子电离的强微波场或以上的价电子在里德伯原子的轨道频率，第二，操纵里德伯原子与稍微弱的微波场。该项目第一部分的目标是将低频电磁场电离原子与高频场电离联系起来。在前一种情况下，缓慢变化的电磁场会扭曲原子势，使电子逃逸。在后者中，光子被吸收。该项目第二部分的目标是操纵电子的轨道频率，实验将使用碱原子的原子束进行。使用脉冲染料激光器将原子激发到里德伯态，并且在激光激发之后，它们暴露于微波脉冲。微波脉冲的影响是通过分析最终状态来确定的，无论是通过状态选择性场电离的束缚原子或测量电离的原子的分数。该计划的更广泛影响涉及教育以及对其他领域的应用。