Çiftlenmiş yüzey plazmon yapıları ve uygulamaları

Surface plasmons have attracted great interests during past decades due to theirunique physical properties. In this thesis, we study grating-coupled surface plasmonsfor sensing and filtering applications. We first present simple physicaland chemical procedures that allow tuning and modification of the topographyof gratings present in optical storage discs into geometries optimal for gratingcoupled plasmon resonance excitation. After proper metal coating, the tunedsurfaces exhibit sharp plasmon resonances that can be excited at wavelengthsranging from 260 nm to over 2.7 ?m with relatively high quality factors. Asan immediate exemplary application, use of such optimized gratings in aqueousmedium for refractive index measurement is demonstrated.We also report another plasmonic component based on a pair of surfaces displayinggrating coupled plasmon enhanced transmission. We observe high qualityfactor transmission peaks as high as 100 through our plasmonic filter based ongratings obtained directly from optical storage disks. Wavelength and polarizationdependent transmission is also demonstrated in the visible and infraredportions of the spectrum. The resonance wavelength of this filter can be tunedby simply changing the angle of incidence. Numerical calculations agree wellwith measurements. Our work can open up directions toward disposable opticalcomponents such as filters and polarizers.Morever, we investigate plasmonic force between two coupled metallic layers.We observe the mode splitting due to coupling between plasmonic surfaces byusing finite difference time domain simulations.Keywords: Surface Plasmons, Grating Coupling, Optical Disks, Filter, PrismCoupling, MIM Waveguide, Mode Splitting, Plasmonic Force.