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  - JOUR
A1  - Brixner, Tobias
A1  - Pawłowska, Monika
A1  - Goetz, Sebastian
A1  - Dreher, Christian
A1  - Wurdack, Matthias
A1  - Krauss, Enno
A1  - Razinskas, Gary
A1  - Geisler, Peter
A1  - Hecht, Bert
T1  - Shaping and spatiotemporal characterization of sub-10-fs pulses focused by a high-NA objective
N2  - We describe a setup consisting of a 4 f pulse shaper and a microscope with a high-NA objective lens and discuss the spects most relevant for an undistorted spatiotemporal profile of the focused beam. We demonstrate shaper-assisted pulse compression in focus to a sub-10-fs duration using phase-resolved interferometric spectral modulation (PRISM). We introduce a nanostructure-based method for sub-diffraction spatiotemporal characterization of strongly focused pulses. The distortions caused by optical aberrations and space–time coupling from the shaper can be reduced by careful setup design and alignment to about 10 nm in space and 1 fs in time.
KW  - Interference microscopy
KW  - Scanning microscopy
KW  - Subwavelength structures
KW  - nanostructures
KW  - Pulse shaping
KW  - Ultrafast measurements
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-111120
ER  -