GaN- and VO 2-based nanostructures: physics and photonic applications

Jostmeier, Thorben

GaN- and VO 2-based nanostructures: physics and photonic applications

dc.contributor.advisor	Betz, Markus
dc.contributor.author	Jostmeier, Thorben
dc.contributor.referee	Krenner, Hubert J.
dc.date.accepted	2016-11-20
dc.date.accessioned	2016-12-02T14:17:42Z
dc.date.available	2016-12-02T14:17:42Z
dc.date.issued	2016
dc.description.abstract	This thesis presents fundamental research on potential materials and concepts for active photonic elements operating in the telecom wavelength regime. It is analyzed how the characteristics of the investigated nanostructures and the implementation of the proposed concepts could be applied in photonic research or devices. The first part of the thesis is devoted to the investigation of semiconductor heterostructures. The inter-miniband (IMB) transition in superlattices made of GaN and AlN in the cubic phase is characterized in terms of its linear and ultrafast nonlinear optical properties. In particular, the central energy and energetic width of the IMB transition is analyzed, and the time-scales of the electron relaxation are examined. In the second part, photonic and plasmonic applications of nanocrystals made of the phase change material vanadium dioxide (VO 2) are studied. It is shown how the optically-induced metal-insulator phase transition (MIT) can be utilized for the creation of reconfigurable active photonic elements. Different approaches to define diffraction gratings and Fresnel zone plates are presented. VO 2 based nanocomposites and the MIT are moreover utilized for research on surface plasmon polaritons (SPPs). Novel routes for the creation of plasmonic elements that allow for an active control of the light-SPP coupling strength are demonstrated. The concepts are based on the grating-assisted light-SPP coupling and the Kretschmann configuration.	de
dc.identifier.uri	http://hdl.handle.net/2003/35688
dc.identifier.uri	http://dx.doi.org/10.17877/DE290R-17719
dc.language.iso	en	de
dc.subject	Photonics	de
dc.subject	Plasmonics	de
dc.subject	Surface plasmon polariton	de
dc.subject	Vanadium dioxide	de
dc.subject	GaN	de
dc.subject	Superlattice	de
dc.subject	Photonik	de
dc.subject	Plasmonik	de
dc.subject	Oberflächenplasmen	de
dc.subject	Vanadiumdioxid	de
dc.subject	Übergitter	de
dc.subject.ddc	530
dc.subject.rswk	Photonik	de
dc.subject.rswk	Oberflächenplasmon	de
dc.subject.rswk	Vanadiumdioxid	de
dc.subject.rswk	Übergitter	de
dc.title	GaN- and VO 2-based nanostructures: physics and photonic applications	de
dc.type	Text	de
dc.type.publicationtype	doctoralThesis	de
dcterms.accessRights	open access

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