Excitation and Detection of Highly Confined Plasmonic Gap Modes with Subwavelength Dimensions [Elektronische Ressource] = Anregung und Detektion hochlokalisierter plasmonischer Gap-Moden mit Subwellenlängendimensionen / Jing Wen. Betreuer: Bernhard Schmauss

Excitation and Detection ofHighly Confined PlasmonicGap Modes withSubwavelength DimensionsAnregung und Detektionhochlokalisierter plasmonischerGap-Moden mitSubwellenlängendimensionenDer Technischen Fakultät derUniversität Erlangen-Nürnbergzur Erlangung des GradesDOKTOR-INGENIEURvorgelegt vonJing Wenaus Hubei, ChinaErlangen-2011Als Dissertation genehmigt vonder Technischen Fakultät derUniversität Erlangen-NürnbergTag der Einreichung: 04.07.2011Tag der Promotion: 19.10.2011Dekan: Prof.Dr.-Ing.habil. Marion MerkleinBerichterstatter:Prof.Dr.-Ing. Bernhard SchmaussProf.Dr. Ulf PescheliSummaryPlasmonicgap waveguidesallowfor light confinement below thediffraction limit. They have great potentials for further highlyintegrated plasmonic devices, but are difficult to excite. Thisthesis demonstrates the coupling of light from the far field tohighly confined plasmonic gap modes via connected nanoanten-nas, both numerically and experimentally. Propagating surfaceplasmon modes can either be detected in the far field by using across polarization setup or in the near field by a scanning near-field opticalmicroscope(SNOM). Gapplasmonic modes aresuc-cessfullyprobedbyfocusingGaussianopticalbeamsonaloadedoptical antenna. In addition to probing propagating plasmonicmodes in a waveguide, the excitation of a plasmonic nano-rodresonatoris realizedby anincidentelectronbeam.