Controlling light emission with plasmonic nanostructures
Robert Jan Moerland
Robert Jan Moerland
This thesis discusses interactions of light and emitters with metallic (nano-) structures. Investigations (theoretical and experimental) are carried out for a lens specifically for near fields, which allows imaging of the near field. The lens is composed of a thin metal film on a dielectric surface. A method is presented that can directly evaluate the performance of a metallic film as a lens, at optical frequencies. With a near-field optical probe, acting as a source, experimental data prove that the performance of a silver film as a lens improves with decreasing wavelength
Furthermore, a near-field method is discussed for reversible and a priori control of the polarization of radiation emitted by a single emitter, such as a molecule. Placing a metal nanoscale object, close to an emitter, alters its emission properties, such that the polarization of the emission in the far field can be chosen at will. Finally, the behaviour of emitters embedded in a periodic array of rectangular holes in a metallic film is discussed
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