Polarization Quantum Beat Spectroscopy in Diatomic Molecules

双原子分子中的偏振量子拍光谱

• 批准号: 1309571
• 负责人: Burcin Bayram
• 金额: $ 15万
• 依托单位: Miami University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1309571&HistoricalAwards=false
• 关键词: Polarization; Quantum; Beat; Spectroscopy; Diatomic

In this scientific project, energy transfer processes in collisions between atoms and molecules are investigated. These processes play an important role and are essential to the understanding of combustion dynamics, astrophysical plasmas and plasma formation. The results can serve as bench marks with which to verify theoretical models of the processes. Theoretical models are themselves useful because they may be then conveniently applied to physical systems that are more difficult or more expensive to study experimentally. The amount of energy transfer arising from collisions between atoms and molecules will be studied by using two lasers. First, the internal properties of the quantum states of molecules will be manipulated by a laser beam. These molecules then oscillate like vibrating violin strings and collisions can alter their quantum properties. A second probe laser will arrive at the system after some time delay and sense this alteration. By varying the delay time between the two lasers as short as 10 picoseconds, time evolution of the molecular properties can be mapped out, similar to the way a stroboscope maps out the motion of macroscopic objects. These studies can provide exceptional spectroscopic precision and understanding of the various transfer processes.This project provides understanding of energy transfer processes that are important in combustion and plasma formation. It has an essential and socially important educational aspect as well. This project integrates research components into course work at Miami University while providing students with hands-on laboratory experience with state-of-the-art technology. The extensive research training and mentoring of undergraduate and graduate students contribute to the future professionals entering science, technology, engineering and mathematics (STEM) fields.

在这个科学项目中，研究了原子和分子之间碰撞中的能量传递过程。这些过程起着重要作用，对于理解燃烧动力学，天体物理等离子体和等离子体形成至关重要。结果可以用作验证过程理论模型的基准标记。理论模型本身很有用，因为然后可以方便地将其用于实验研究更困难或更昂贵的物理系统。 通过使用两个激光器，将研究由原子和分子之间碰撞产生的能量转移量。首先，分子的量子状态的内部特性将通过激光束操纵。然后，这些分子像振动的小提琴弦和碰撞一样振荡，可以改变其量子特性。一段时间后，第二次探测激光将到达系统，并感知此更改。通过将两个激光器之间的延迟时间变化为短至10个picseconds，可以将分子特性的时间演变映射出来，类似于频镜镜头映射宏观对象运动的方式。 这些研究可以提供异常的光谱精度和对各种转移过程的理解。该项目提供了对燃烧和血浆形成重要的能量传递过程的理解。 它也具有重要且在社会上重要的教育方面。该项目将研究组件纳入迈阿密大学的课程工作，同时为学生提供最先进技术的实验室经验。本科生和研究生的广泛研究培训和指导为进入科学，技术，工程和数学（STEM）领域的未来专业人员做出了贡献。