Strong Field Chemistry

坦普尔大学的罗伯特·莱维斯得到了实验物理化学计划的支持，继续他的研究，旨在了解和利用强、超快激光脉冲与多原子分子的相互作用。实验计划集中在三个相互关联的领域：1)了解分子的强场非绝热激发，2)中红外电离/解离，研究电荷转移态在强场光解中的作用，以及3)基于强场激光的方法在控制气相生物分子解离中的应用。将在两个理论领域开展工作，特别是继续开发包括Landau-Dykne型激发和多电子非绝热激发方案在内的简单模型，以及继续合作开发Ehrenfest类型的动力学，以更好地理解和控制强激光场中多原子分子的激发。这项研究的结果有望使人们对在强、超快激光存在下更大、更复杂的分子系统中发生的光物理过程有新的理解。从长远来看，这项研究的结果有望有助于高科技化学的发展。最终应用于天然产物/复杂分子合成、生物医学诊断、纳米材料合成、分子电子学和化学/生物传感器开发是可能的。

Robert Levis of Temple University is supported by the Experimental Physical Chemistry Program to continue his research aimed at understanding and exploiting the interaction of intense, ultrafast laser pulses with polyatomic molecules. The experimental program focuses on three interconnected areas: 1) understanding strong-field nonadiabatic excitation of molecules, 2) ionization/dissociation in the mid-infrared, examining the role of charge transfer states in strong field photodissociation, and 3) the application of strong field laser-based methods for controlling gas phase biomolecule dissociation. Work will occur in two theoretical areas, specifically continuing the development of simple models including Landau-Dykne-type excitation and multi-electron nonadiabatic excitation schemes, and continuing a collaboration to develop Ehrenfest-type dynamics to understand and control better the excitation of polyatomic molecules in intense laser fields. Outcomes are expected to enable new understanding of the photophysical processes occurring in larger and more complex molecular systems in the presence of intense, ultrafast laser light.Outcomes from this research, in the long run, are expected to assist in the development of high technology chemistries. Eventual applications in natural products/complex molecules synthesis, biomedical diagnostics, nanomaterials synthesis, molecular electronics, and chemical/biological sensor development are possible.