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approvedabstract_osi2015_mfleischer_full.pdf2015-03-29 02:08:14Monika Fleischer


Author: Monika Fleischer
Requested Type: Pre-Selected Invited
Submitted: 2015-03-01 08:44:33


Contact Info:
University of Tuebingen
Auf der Morgenstelle 10
Tuebingen,   72076

Abstract Text:
Plasmonic nanostructures acting as optical antennas are employed to locally create strong electrical near-fields or concentrate energy. The nanostructure material and geometry can be tailored to match the localized surface plasmon resonances to the wavelength of excitation or to particular transitions of a nanosystem coupled to the antenna. Such hybrid structures present interesting systems for fundamental studies as well as device applications.

In the presented work plasmonic nanostructures are fabricated by electron beam lithography, either by lift-off or by etch-mask transfer. The geometry and plasmonic modes of the metallic nanostructures, in particular gold nanocones, are characterized by scanning electron microscopy, numerical simulations, and nanospectroscopy. To prepare individual hybrid systems based on these structures, nanoscale control over the positioning of nanoemitters within the high near-field regions of the nanoantennas is required. Firstly, strategies for the self-aligned fabrication of nanocone-nanoemitter structures by back-etching, dry ablation and dielectrophoresis are demonstrated. Secondly, nanogratings coupled to organic thin-films are discussed. The respective hybrid systems are investigated by microscopy, dark-field scattering, extinction, and Raman spectroscopy.