Collision Induced Processes in Macroscopic Optical Coherence(Physics)

宏观光学相干中的碰撞诱发过程（物理）

• 批准号: 8922212
• 负责人: John Thomas
• 金额: $ 23.5万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922212&HistoricalAwards=false
• 关键词: Collision; Induced; Processes; Macroscopic; Optical

It is proposed to continue a program of experimental study and theoretical interpretation, of collision-induced phase in macroscopic optical coherence for two-level atoms. The experimental configuration is similar to that of an optical photon-echo measurement except that detection is based, not on a reradiated pulse, but on interrogation of the prepared system in terms of absorption from a weak c.w. probe laser beam. A phase is measured as a function of the partial pressure of perturber atoms. Measurement of phase, as opposed to intensity effects is, in effect, to study the "imaginary' rather than the "real" collision kernels. This investigation is unique in this respect, and surprising contrasts were found in studies of 174Yb, between the imaginary and the (well-studied) real collision kernel properties. The method will be extended to 154Sm, which may provide new surprises, and will, on the basis of a detailed comparison between Yb and Sm results, greatly facilitate physics interpretation of results.

建议继续开展两能级原子宏观光学相干碰撞诱导相位的实验研究和理论解释计划。 该实验配置类似于光学光子回波测量，不同之处在于检测不是基于再辐射脉冲，而是基于对所准备的系统的弱连续波吸收的询问。探测激光束。 相位被测量为扰动原子分压的函数。 与强度效应相反，相位测量实际上是为了研究“想象的”而不是“真实的”碰撞内核。这项研究在这方面是独一无二的，在 174Yb 的研究中发现了想象的和（经过充分研究的）真实碰撞内核属性之间的令人惊讶的对比。该方法将扩展到 154Sm，这可能会在 Yb 和 Sm结果，极大地方便了物理结果的解释。