Dynamical Control of Resonant Light-Matter Interaction

该项目将开发新的动力学方法，通过强非共振控制场对共振原子跃迁参数（频率和/或线宽）进行时间和/或空间调制，控制共振光-物质相互作用。它包括（i）一种新的高效的方法，用于形成真空紫外和XUV阿秒脉冲，通过光谱展宽的原子参数的时间调制的装置和（ii）的方法，以产生和光学控制的光子结构在均匀的原子介质中，通过由强激光场诱导的折射率的特殊调制。一个理论的VUV和XUV辐射变换在其传播过程中通过光学厚共振吸收原子介质，动态扰动的强红外或光学激光辐射，将开发。它将促进对强超快光-物质相互作用的理解和控制，包括对共振，干涉和合作效应在这种相互作用中的作用的理解。Attosec脉冲为记录和控制原子、分子和纳米结构中的电子运动提供了独特的超快工具，从而在化学和生物学、医学和能量学中产生了深远的应用。发展新的阿秒脉冲形成方法，使其脉冲特性上级或互补于现有的高次谐波产生技术，将进一步推动这些具有战略意义和根本意义的应用。在具有由控制场的强度和频率确定的广泛可变参数的均匀分布的原子系综中光学产生光子结构的新方法的发展将从根本上扩展这种结构用于控制和操纵光的流动的应用。研究生和本科生将在原子，分子和光学科学的这些跨学科领域进行培训，学习和开发基于现代激光技术的超快强场制度中光-物质相互作用的相干控制方法。将开始与实验小组合作，目的是在实验研究中实施新开发的相干控制动力学方法。

The project will develop new dynamical methods to control the resonant light-matter interaction through modulation in time and/or in space of the parameters of the resonant atomic transition (frequencies and/or line widths) by means of the strong off-resonant control field. It includes the development of (i) a new highly efficient method for the formation of the VUV and XUV attosecond pulses via the spectrum broadening by means of the temporal modulation of the atomic parameters and (ii) a method to produce and to control optically the photonic structures in a homogeneous atomic media via special modulation of the refractive index induced by the strong laser field. A theory of the VUV and XUV radiation transformation during its propagation through an optically thick resonantly absorbing atomic medium, dynamically perturbed by a strong IR or optical laser radiation, will be developed. It will advance understanding and control of the strong ultrafast light-matter interactions, including appreciation of the role of the resonant, interference, and cooperative effects in such interactions. Attosec pulses provide a unique ultrafast tool for recording and control of the electronic motion in atoms, molecules, and nanostructures, leading to profound applications in chemistry and biology, medicine and energetics. Development of the new method of attosecond pulse formation with the pulse characteristics superior or complementary to those produced by the current high-harmonic-generation technique will further push those strategically and fundamentally important applications. Development of the new method for an optical production of the photonic structures in the homogeneously distributed atomic ensembles with the widely variable parameters, determined by the intensity and frequency of the control field, will essentially extend the applications of such structures for the control and manipulation of the flow of light. The graduate and undergraduate students will be trained in these interdisciplinary fields of atomic, molecular, and optical science, learning and developing the methods of coherent control of the light-matter interaction in the ultrafast strong-field regimes based on the modern laser technologies. Collaboration with experimental groups will be initiated, aiming at implementation of the newly developed dynamical methods of coherent control in the experimental investigations.