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

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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.