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Heat cost of parametric generation of microwave squeezed states
In parametric systems, squeezed states of radiation can be generated via extra work done by external sources. This eventually increases the entropy of the system despite the fact that squeezing is reversible.We...
PublicationsInterlayer-coupled spin vortex pairs and their response to external magnetic fields
We report on the response of multilayer spin textures to static magnetic fields. Coupled magnetic vortex pairs in trilayer elements (ferromagnetic/nonmagnetic/ferromagnetic) are imaged directly by means...
PublicationsSub-diffraction imaging on standard microscopes through Photobleaching Microscopy with non-linear Processing
Discerning organelles and molecules at nanometer resolution is revolutionizing biological sciences. However, such technology is still limitedly available for many cell biologists. We present here a novel...
PublicationsFast M2 measurement for fiber beams based on modal analysis
We report on a fast and experimentally easy technique for measuring the beam ropagation ratio M2 of light guided by optical fibers. A holographic filter enables us to determine amplitudes and phases of...
PublicationsEvaluation of Colloids and Activation Agents for Determination of Melamine Using UV-SERS
UV-SERS measurements offer a great potential for environmental or food (detection of food contaminats) analytics. Here, the UV-SERS enhancement potential of various kinds of metal colloids, such as Pd,...
PublicationsFluorescence dye as novel label molecule for quantitative SERS investigations of an antibiotic
Within this contribution, the proof-of-principle for a new concept for indirect surface-enhanced Raman spectroscopy (SERS) detection is presented. The fluorescence dye FR-530 is applied as a label molecule...
PublicationsFluorescence quenching in Zn2+-bis-terpyridine coordination polymers: a single molecule study
A Zn2+-bis-terpyridine coordination polymer is investigated by single molecule fluorescence spectroscopy (SMS). The bis-terpyridine ligands of the coordination chromophore bear conjugated chromophores...
PublicationsAn EUV beamsplitter based on conical grazing incidence diffraction
We present an innovative grating design based on conical diffraction which acts as an almost perfect and low-loss beamsplitter for extreme ultraviolet radiation. The scheme is based on a binary profile...
PublicationsRuthenium dye functionalized gold nanoparticles and their spectral responses
The functionalization of metal nanoparticles provides access to materials with unique chemical and physical properties for a wide range of applications, e.g. in catalysis,optoelectronics and material science....
PublicationsRefractive Index Measurement Based on Core-Cladding Mode Interferometry in Endlessly Single Mode Fiber
We propose a simple almost “all-fiber” sensor based on intermodal interference of core and cladding mode in an endlessly single mode photonic crystal fiber. Sensitivity to an external refractive index...
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