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

在本计画中，将设计并优化多极粒子与系统。多极粒子的线性和非线性光学性质为超快纳米光学的基础和应用研究开辟了新的可能性。多极粒子和结构将使用新的实验方法，激光诱导转移。它们对光学和表面等离子体激元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。利用超短激光脉冲引起的带间跃迁激发和绝热金属化效应，研究多极粒子和粒子系统光学性质的超快开关。将设计和表征用于产生电场和磁场的局部热点的多极粒子的金属-电介质混合系统。有序和无规混合纳米结构可用作新型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，提供了独特的可能性，为新型低强度开关元件和探测磁场在光频率。我们计划使用共振激发的多模粒子来实现具有表面等离子体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.