Multipole interactions in nanooptical and plasmonic systems for nanosensors and nanooptical logical elements

在这个项目中，多极粒子和系统将被设计和优化。多极粒子的线性和非线性光学特性为超快纳米光学的基础和应用研究开辟了新的可能性。利用激光诱导转移的新实验方法将产生多极粒子和多极结构。它们对光学和表面等离子体极化场的响应将分别通过傅里叶变换显微镜和干涉泄漏辐射显微镜进行研究。利用超短激光脉冲激发带间跃迁和绝热金属化效应，研究多极粒子和粒子体系光学性质的超快切换。多极粒子的金属-介电混合系统将被设计和表征，用于产生局域的电场和磁场热点。有序和随机混合纳米结构可以作为新型的高灵敏度传感器元件。特别感兴趣的是磁偶极子相互作用的研究，为新型低强度开关元件和探测光学频率的磁场提供了独特的可能性。我们计划用共振激发的多模粒子来实现具有表面等离子激元的光学逻辑元件。

In this project, multipole-particles and systems will be designed and optimized. The linear and nonlinear optical properties of multipole-particles open new possibilities for fundamental and applied research in ultrafast nanooptics. Multipole-particles and structures will be generated using the novel experimental methods of laser induced transfer. Their response to optical and surface plasmon-polariton fields will be studied by Fourier-transform microscopy and interferometric leakage radiation microscopy, respectively. Ultrafast switching of optical properties of multipole-particles and particle systems will be studied, using excitation of interband transitions and adiabatic metallization effects induced by ultrashort laser pulses. Metallic-dielectric hybrid systems of multipole particles for generating localized hot-spots of electric and magnetic fields will be designed and characterized. Ordered and random hybrid nanostructures can be applied as novel highly sensitive sensor elements. Of special interest is the study of magnetic dipole interactions, providing unique possibilities for novel low-intensity switching elements and for probing magnetic fields at optical frequencies. We plan to use resonantly excited multimode-particles for the realization of optical logic elements with surface plasmon-polaritons.