Coupling mediated coherent control of localized plasmonic resonances

耦合介导的局域等离子体共振的相干控制

• 批准号: 222306284
• 负责人: Professor Dr. Thomas Zentgraf
• 金额: --
• 依托单位: Ultrafast Nanophotonics Group
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/222306284?language=en
• 关键词: Coupling; mediated; coherent; control; localized

A direct control of the light matter interaction and therefore the modification of the light propagation is a major challenge in optical research. With our project we want to explore the possibilities of coherently controlled light-matter interaction in plasmonic metamaterials with the goal of modifying the light propagation and nonlinear light emission. In comparison to previous and on-going research in the field of coherent control of light fields our proposal focuses on the strong near-field interaction of plasmonic meta-atoms. In particular we are interested in utilizing strong near-field coupling effects to coherently control an effect called plasmon induced transparency. Similar to atomic physics where the electromagnetic induced transparency can lead to an enhancement of the nonlinear properties due to large dispersion we expect that the plasmon induced transparency in plasmonic meta-atoms should lead to similar effects like light storage and strong field enhancement. However, the short life times and the high energy dissipation in the plasmonic systems together with extremely small structures sizes are tremendous challenges in a practical realization. Furthermore, it is unclear if the near-field coupling effects are strong enough to lead to a complete control of the optical properties. Meeting these challenges will yield a fundamental and more complete understanding of the linear and nonlinear optical properties of collective excitations in strongly coupled metallic meta-atoms and metamaterials. The answers of these problems can potentially help to modify or improve the nonlinear response of active photonic devices with metal-based nanostructures in the future.

对光物质相互作用的直接控制以及对光传播的修正是光学研究中的一大挑战。通过我们的项目，我们想要探索等离子体超材料中相干控制的光-物质相互作用的可能性，目的是改变光的传播和非线性光发射。与以前和正在进行的光场相干控制领域的研究相比，我们的提议侧重于等离子体准原子的强近场相互作用。特别是，我们感兴趣的是利用强近场耦合效应来相干控制一种被称为等离子体诱导透明的效应。类似于原子物理中，由于大的色散，电磁诱导的透明可以导致非线性性质的增强，我们期望等离子体激元在准原子中诱导的透明应该会导致类似的效应，如光存储和强场增强。然而，等离子体系统的短寿命和高能量耗散，以及极小的结构尺寸是实现实际的巨大挑战。此外，还不清楚近场耦合效应是否足够强，从而导致对光学性质的完全控制。迎接这些挑战将使我们对强耦合金属原子和超材料中集体激发的线性和非线性光学性质有一个更基本和更全面的理解。这些问题的解答可能有助于改进或改善未来金属基纳米结构有源光子器件的非线性响应。