Femtosecond dynamics and control of metal-organic hybrid plasmonic systems

本项目的主题是研究与宽带飞秒激光脉冲相互作用的纳米尺度金属-有机等离子体混合系统。所研究的杂化体系由表面等离子体支撑金属纳米结构和有机纳米纤维组成，具有很强的非线性和光波导特性。在我们的研究中，我们计划系统地处理和控制这些混合器件在光耦合和光传输方面的时空响应。我们研究中将使用的主要实验技术是时间分辨和干涉双光子光电子显微镜技术，它使我们能够在远低于衍射极限的长度尺度上监测局域纳米光场的超快相态和群动力学。基于低聚苯的有机纳米纤维表现出宽频带和几乎无损耗的光波导特性，其波长低至400 nm。我们相信，这些光纤可以作为光通道亚单位和高度局域的、非线性的有源发射体在未来的超快纳米光子器件中发挥关键作用。

The subject of this project is the study of nano-scaled metal-organic plasmonic hybrid-systems in interaction with broadband femtosecond laser pulses. The investigated hybrid systems are composed of surface plasmon supporting metal nanostructures and organic nanofibers characterized by strong nonlinear characteristics and optical waveguiding properties. In our study we plan to systematically address and control the spatio-temporal response of these hybrid devices with respect to light-coupling and light-transport. The main experimental technique that will be applied in our study is the time-resolved and interferometric two-photon photoemission electron microscopy technique which enables us to monitor the ultrafast phase- and group dynamics of localized nano-optical fields on length scales that are well below the diffraction limit. Oligophenylene-based organic nanofibers exhibit broadband and almost loss-free optical waveguiding properties down to wavelengths as short as 400 nm. We believe that these fibers can play a crucial role as light-channeling sub-units and highly localized, nonlinear active emitters in future ultrafast nanophotonic devices.