Resonant Nanophotonics
Group leader: Dr. Femius Koenderink
The Resonant Nanophotonics group initiated its activities in February 2008. The interest of this group is in studying subwavelength photonic structures that are assembled from scatterers with an intrinsic resonance, such as plasmon resonant particles, or subwavelength metamaterial resonances that have a resonant magnetic response to light.
Plasmonic and metamaterial building blocks are essentially part of the same toolkit for nanophotonics: a kit that consists of subwavelength ('point-like') scatterers with a tailored resonance in electric and magnetic polarizability that can be coupled to give rise to complex functional optical behavior. Predictions range from optical nanocircuits in which light is guided and processed in subwavelength photonic structures to optical nano-antenna structures in which single light sources can be controlled in terms of emission rate, directionality and polarization. We study these structures by far-field scattering, microscopy and near-field emitter microscopy.
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- (Left) Array antennas of plasmonic particles on glass. Depending on pitch, particle size and metal (Ag or Au), the antennas operate at different wavelengths. (Right) Split rings of 200 nm in size of gold on glass operate as magnetic scatterers at telecom wavelengths. All structures were fabricated by e-beam lithography in the Amsterdam nanocenter.
