6815 Suchergebnisse für: „“

Tip-enhanced Raman scattering—Targeting structure-specific surface characterization for biomedical samples

Tip-enhanced Raman scattering (TERS) has become a powerful tool for nanoscale structural analysis for several branches of organic, inorganic and biological chemistry. This highly sensitive technique enables...

Bessel beam CARS of axially structured samples

We report about a Bessel beam CARS approach for axial profiling of multi-layer structures. This study presents an experimental implementation for the generation of CARS by Bessel beam excitation using...

Optimized emitter contacting on multicrystalline silicon thin film solar cells

We present an optimized contacting scheme for multicrystalline silicon thin film solar cells on glass based on epitaxially crystallized emitters with a thin Al2O3 layer and a silver back reflector. In...

Watt-Level Megahertz-rate Femtosecond Mid-Infrared Source

Spectral broadening and peak power limitations of normally dispersive photonic Crystal fibres for high-power fs light sources

Peak power and peak irradiance limitations of photonic crystal fibres with various mode-field-diameters are investigated with 250-fs input pulses. Maximal spectral broadening factors increase with decreasing...

Low-loss single-mode guidance in large-core antiresonant hollow-core fibers

We present an approach how to combine large mode field diameters with effective single-mode guidance in a hollow-core antiresonant optical fiber. We demonstrate experimentally and in simulations that single-mode...

Fiber-based dual-focus time-demultiplexed second harmonic generation microscopy

We present a dual-focus second harmonic generation (SHG) microscopy approach based on stable, compact, and inexpensive fiber technology. One-tenth of the fiber laser output is coupled into a 100 m (=500...

Miniaturized multiplex PCR with melting curve analysis for detection and discrimination of Legionella pneumophila from Legionella spp. and other waterborne pathogens

Legionella pneumophila are gram negative pathogenic water organisms with worldwide significance. Current methods for detection of these pathogens are time and/or cost intensive. We describe a miniaturized...

Characterization of pH dependent Mn(II) oxidation strategies and formation of a bixbyite-like phase by Mesorhizobium australicum T-G1

Despite the ubiquity of Mn oxides in natural environments, there are only a few observations of biological Mn(II) oxidation at pH < 6. The lack of low pH Mn-oxidizing bacteria (MOB) isolates limits...

Suppression of spin-exchange relaxation in tilted magnetic fields within the geophysical range

We present a detailed experimental and theoretical study of the spin-exchange mechanism arising in the electronic ground states of alkali-metal vapor atoms. As opposed to the well-explored formation of...