Nonlinear and nonlocal optical response in complex nanostructured multilayers (A05)

在一个复杂的大尺度结构的光学响应的纳米功能的局部效应的影响是在这个项目的核心。它扩展了经典的方法来描述多层，纳米叠层和其他复杂的超材料，如非晶复合材料的非线性特性。从半经典的角度发展了多层结构的非线性理论。这包括金属部件中的非经典电子相互作用效应和粗糙界面产生的额外散射。这种复杂的系统能够分别通过几何和材料参数以及通过局部场增强现象实现非线性的高可调谐性和放大。这些发现支持项目B3| Szeghalmi/Tünnermann和B4| Nolte/Zeitner处理非晶薄膜和混合多层膜。关于电子动力学的半经典描述，该项目将从与项目A3的密切合作中受益匪浅|Busch/Peschel。

The impact of localized effects at nanosized features on the optical response of a complex largescale structure is at the heart of this project. It extends classical methods to describe nonlinear properties of multilayered, ultrathin nanolaminates and other complex metamaterials, such as amorphous composites. A nonlinear theory for multilayered structures is developed from a semiclassical perspective. This includes non-classical electron interaction effects in metal components and additional scattering stemming from rough interfaces. Such complex systems enable a high tunability and amplification of nonlinearities through geo-metrical and material parameters and via local field enhancement phenomena, respectively. These finding support the projects B3|Szeghalmi/Tünnermann and B4|Nolte/Zeitner dealing with amorphous films and hybrid multilayers. With respect to a semiclassical description of electron dynamics, the project will strongly benefit from close collaboration with project A3|Busch/Peschel.