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Laser induced deflection (LID) method for absolute absorption measurements of optical materials and thin films

We use optimized concepts to measure directly low absorption in optical materials and thin films at various laser wavelengths by the laser induced deflection (LID) technique. An independent absolute calibration,...

Experimental characterization of bi-directional terahertz emission from gold-coated nanogratings

The THz radiation emission of Au coated nanogratings (fused silica substrate, 30 nm Au layer thickness, 500 nm grating constant) upon fs laser irradiation (785 nm, 150 fs, 1 kHz, 1 mJ/pulse) is observed...

Disruption-free imaging by Raman spectroscopy reveals a chemical sphere with antifouling metabolites around macroalgae

Investigations of the surface chemistry of marine organisms are essential to understand their chemically mediated interactions with fouling organisms. In this context, the concentration of natural products...

Pressure and temperature characterization of two interferometric configurations based on suspended-core fibers

Fabry–Pérot cavity (FPC) made of SCF spliced in-between segments of single-mode and hollow-core fiber is proposed. The interferometric signals are generated by the refractive-indexmismatches between...

Control of vortex pair states by post-deposition interlayer exchange coupling modification

In this work we report on both, the global and the micromagnetic properties of interlayer exchange coupled spin systems. We apply ion irradiation as a post-deposition method to modify the coupling strength...

Analysis and characterization of coordination compounds by resonance Raman spectroscopy

Resonance Raman spectroscopy has become a powerful tool to study excited-state geometries, excited-state charge distributions and photoinduced reaction dynamics in coordination compounds. Due to their...

SQIF-based dc SQUID amplifier with intrinsic negative feedback

Optimization of a digital SQUID magnetometer in terms of noise and distortion

The digital SQUID magnetometer takes advantage of flux quantization in a superconducting loop in order to measure magnetic fields. Core element of the digital SQUID is a Josephson comparator with a superconducting...

MEMS: Fabrication of cryogenic bolometers

Cryogenic bolometers are among the most sensitive devices for the detection of electromagnetic radiation in the sub-millimeter range. Such radiation is of interest for astronomical observations as well...

Formaldehyde LIF detection with background subtraction around single igniting GTL diesel droplets

Formaldehyde is an important combustion intermediate, which is often used for the analysis of turbulent flames, internal combustion engines or droplet/spray ignition processes. Due to its high concentration...