Coordination and workshops

这一优先计划的目的是分析、相干控制和利用金属纳米结构和混合纳米结构中电磁激励的时空动力学。在这样的系统中，电磁激励倾向于高度局域化和强烈增强。这种场局域化现象在各个学科的各种重要应用中发挥着关键作用，包括实现新的激光结构，利用光学非线性进行超灵敏的化学和生物探测，以及开发用于量子信息处理的增强型单光子源。超快宽带光脉冲对纳米结构的相干激发增加了时间自由度，并允许控制纳米局域场的时空性质。不断发展的“超快纳米光学”领域提供的远远不止是高时间和空间分辨率的总和。它提供了对近场激发和相互作用的访问，这超出了现有超快技术的范围，从而产生了巨大的附加值。理解和操纵纳米结构中的电磁场动力学是一个具有挑战性的基本实验和理论问题。在理论方面，挑战在于自洽地描述量子系统和介观电磁场的耦合演化。这一优先计划的研究主题包括超短激光脉冲与纳米结构的耦合，宽带纳米光激发的传播，纳米光学中的非线性现象，以及纳米光激发的相干控制。除了基本方面，在物理、化学和生物之间的交叉学科领域也实现了新的光谱应用。

The aim of this priority program is to analyze, coherently control, and utilize the spatiotemporal dynamics of electromagnetic excitations in metallic nanostructures and hybrid nanostructures. In such systems, electromagnetic excitations tend to be highly localized and strongly enhanced. Such field-localization phenomena play a key role in a variety of important applications across the disciplines, including the realization of novel laser structures, the exploitation of optical nonlinearities for ultra-sensitive chemical and biological probing, and the development of enhanced single-photon sources for quantum information processing. The coherent excitation of nanostructures by ultrafast broadband light pulses adds the temporal degree of freedom and allows for controlling the spatiotemporal properties of nanolocalized fields. The evolving field of "Ultrafast nanooptics" offers substantially more than the sum of high temporal and spatial resolution. It yields enormous added value by providing access to near-field excitations and interactions that are beyond the reach of existing ultrafast techniques. Understanding and manipulating the electromagnetic field dynamics in nanostructures is a challenging and fundamental experimental and theoretical problem. On the theoretical side, the challenge consists in self-consistently describing the coupled evolution of quantum systems and mesoscopic electromagnetic fields. The research topics tackled in this priority program cover the coupling between ultrashort laser pulses and nanostructures, the propagation of broadband nanooptical excitations, nonlinear phenomena in nanooptics, and coherent control of nanooptical excitations. In addition to fundamental aspects also new spectroscopic applications are realized in the interdisciplinary field between physics, chemistry and biology.