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Extreme-ultraviolet light generation in plasmonic nanostructures

Plasmonic enhancement of high harmonic generation revisited

dc.contributor.advisorRopers, Claus Prof. Dr.
dc.contributor.authorSivis, Murat
dc.titleExtreme-ultraviolet light generation in plasmonic nanostructuresde
dc.title.alternativePlasmonic enhancement of high harmonic generation revisitedde
dc.contributor.refereeRopers, Claus Prof. Dr.
dc.subject.gokPhysik (PPN621336750)de
dc.description.abstractengThe present (cumulative) thesis examines fundamentals of nanostructure-enhanced extreme-ultraviolet light generation in noble gases using two different nanostructure geometries for local field-enhancement. Specifically, resonant antennas and tapered hollow waveguide nanostructures are utilized to enhance low-energy femtosecond laser pulses, which in turn induce light emission from excited xenon, argon and neon atoms and ions. Spectral analysis of this radiation reveals that coherent high-order harmonic generation is not feasible under the examined conditions, contrary to former expectations and reports. Instead, the spectral characteristics unequivocally identify that incoherent fluorescence from multiphoton excited and strong-field ionized gas atoms is the predominant process in such schemes. Furthermore, novel nanostructure-enhanced effects are reported such as surface-enhanced fifth-order harmonic generation (from bow-tie nanoantennas) and the formation of a bistable nanoplasma (in a hollow waveguide). These effects offer intriguing links between nonlinear nano-optics, plasma dynamics and extreme-ultraviolet
dc.contributor.coRefereeSalditt, Tim Prof. Dr.
dc.contributor.thirdRefereeAbel, Bernd Prof. Dr.
dc.contributor.thirdRefereeRaschke, Markus B. Prof. Dr.
dc.subject.engNonlinear plasmonicsde
dc.subject.engMetallic nanostructuresde
dc.subject.engextreme-ultraviolet lightde
dc.subject.enghigh-order harmonic generationde
dc.subject.engatomic fluorescencede
dc.subject.engstrong-field physicsde
dc.subject.engbow-tie antennade
dc.subject.englocalized plasmonsde
dc.subject.engoptical bistabilityde
dc.subject.engplasma dynamicsde
dc.subject.engnoble gas atomsde
dc.subject.engmultiphoton excitationde
dc.subject.engintensity gaugingde
dc.subject.engspectral analysisde
dc.affiliation.instituteFakultät für Physikde

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