TY  - JOUR
A1  - Rewitz, Christian
A1  - Keitzl, Thomas
A1  - Tuchscherer, Philip
A1  - Goetz, Sebastian
A1  - Geisler, Peter
A1  - Razinskas, Gary
A1  - Hecht, Bert
A1  - Brixner, Tobias
T1  - Spectral-interference microscopy for characterization of functional plasmonic elements
JF  - Optics Express
N2  - Plasmonic modes supported by noble-metal nanostructures offer strong subwavelength electric-field confinement and promise the realization of nanometer-scale integrated optical circuits with well-defined functionality. In order to measure the spectral and spatial response functions of such plasmonic elements, we combine a confocal microscope setup with spectral interferometry detection. The setup, data acquisition, and data evaluation are discussed in detail by means of exemplary experiments involving propagating plasmons transmitted through silver nanowires. By considering and experimentally calibrating any setup-inherent signal delay with an accuracy of 1 fs, we are able to extract correct timing information of propagating plasmons. The method can be applied, e.g., to determine the dispersion and group velocity of propagating plasmons in nanostructures, and can be extended towards the investigation of nonlinear phenomena.
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-85922
UR  - http://www.opticsinfobase.org/oe/fulltext.cfm?uri=oe-20-13-14632&id=238393
ER  - 
TY  - THES
A1  - Rewitz, Christian
T1  - Far-Field Characterization and Control of Propagating Ultrashort Optical Near Fields
T1  - Fernfeld-Charakterisierung und Steuerung von propagierenden ultrakurzen optischen Nahfeldern
N2  - In this work, femtosecond laser pulses are used to launch optical excitations on different nanostructures. The excitations are confined below the diffraction limit and propagate along the nanostructures.
Fundamental properties of these ultrashort optical near fields are determined by characterizing the far-field emission after propagation with a setup developed for this task. Furthermore, control of the nanooptical excitations' spatial and temporal evolution is demonstrated for a designed nanostructure.
N2  - In dieser Arbeit werden Femtosekunden-Laserpulse verwendet, um optische Moden auf verschiedenen Nanostrukturen anzuregen. Die optische Energie ist dabei unterhalb des Beugungslimits lokalisiert und die Anregungen propagieren entlang der Nanostrukturen. 
Grundlegende Eigenschaften dieser ultrakurzen optischen Nahfelder werden durch die Charakterisierung der Fernfeld-Emission nach der Propagation bestimmt. Dabei wird eine Messmethode verwendet die eigens für diese Aufgabe entwickelt wurde. Darüber hinaus wird die Steuerung der räumlichen und zeitlichen Entwicklung der nanooptischen Anregungen auf einer für diesen Zweck entworfenen Nanostruktur demonstriert.
KW  - Nahfeldoptik
KW  - Ultrakurzer Lichtimpuls
KW  - Nanooptics
KW  - Surface plasmons
KW  - Ultrafast spectroscopy
KW  - Interference microscopy
KW  - Scanning microscopy
KW  - Ultrafast information processing
KW  - Plasmonics
KW  - Plasmon propagation
KW  - plasmon group velocity
KW  - plasmonic waveguides
KW  - Oberflächenplasmonresonanz
KW  - Optische Spektroskopie
KW  - Konfokale Mikroskopie
KW  - Spektrale Interferenz
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-94887
ER  -