Extreme Multiphoton Coupling in Molecules

本研究项目的重点是研究分子的强场激发的性质和程度。最近的理论工作表明，双原子分子具有这样的电子结构，其中AC斯塔克位移大大降低，多光子耦合大大增强到这样的程度，即高阶（n10）多光子π脉冲可以通过共振过程产生。将使用光学参量放大器研究分子在强激光场中的行为作为激光波长的函数，紫外荧光光谱将用作所形成的激发态的高度特异性指示剂。这项工作预计将在激光/物质相互作用的广阔领域产生重大影响。此外，这些实验需要最先进的激光系统，为学生提供最新激光和光学技术的实践经验，从而为他们提供各种基于研究或高科技的职业道路。

This research project focuses on the study of the nature and extent of the strong field excitation of molecules. Recent theoretical work shows that diatomic molecules possess an electronic structure in which the AC Stark shift is greatly reduced and the multi-photon coupling is greatly enhanced to such an extent that high-order (n10) multi-photon pi pulses can be produced through a resonant process. The behavior of molecules in strong laser fields as a function of laser wavelength will be studied using an optical parametric amplifier, and ultraviolet fluorescence spectroscopy will be used as a highly specific indicator of the excited states formed. This work is expected to have a major impact in the vast field of laser/matter interactions. Moreover, these experiments require state-of-the-art laser systems, giving students hands-on experience with the latest laser and optical technologies and, thus, will prepare them for a variety of research-based or high-tech career paths.