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Resonance-Raman microspectroscopy for quality assurance of dye-sensitized NiOx films with respect to dye desorption kinetics in water
Resonance Raman microspectroscopy is used to investigate dye-sensitized NiOx nanoparticle films to be used as photocathodes in tandem dye-sensitized solar cells. It is shown that rR microspectroscopy has...
PublicationsTowards the control of highly sensitive Fabry-Pérot strain sensor based on hollow-core ring photonic crystal fiber
A high sensitivity Fabry-Pérot (FP) strain sensor based on hollow-core ring photonic crystal fiber was investigated. A low-finesse FP cavity was fabricated by splicing a section of hollow-core ring photonic...
PublicationsMulticorelike guidance in a triangular-core hollow optical fiber and spectral evolution of its eigenmode degeneracy
A unique multi core-like guidance was achieved in a micro-structured optical fiber composed of a circular air hole at the center surrounded by a high-index triangular core. Unique spectral evolution of...
PublicationsFar-Field Imaging for Direct Visualization of Light Interferences in GaAs Nanowires
The optical and electrical characterization of nanostructures is crucial for all applications in nanophotonics. Particularly important is the knowledge of the optical near-field distribution for the design...
PublicationsOptical Properties of Core–Shell Gold–Silver and Silver–Gold Nanoparticles for Near UV and Visible Radiation Wavelengths
Modeling of optical properties of spherical core–shell gold–silver and silver–gold nanoparticles (NPs) was carried out based on extended Mie theory for radiation wavelengths in the range 300≤λ≤650...
PublicationsAssembling gold nanoparticle chains using an AC electrical field: Electrical detection of organic thiols
Here we present the utilization of gold nanoparticle (AuNP) chains assembled between two electrodes using an AC electrical field as a potential nanosensor for molecular detection. We describe an easy way...
PublicationsSurface-metalized polymer nanogratings as high-sensitive Raman-substrates
Raman spectroscopy is a modern and attractive optical tool in chemical and biological applications [1][2]. The detection limit of this method down to lowest concentrations is given by the inherent small...
PublicationsLight-shift suppression in a miniaturized Mx optically pumped Cs magnetometer array with enhanced resonance signal using off-resonant laser pumping
The performance of an optically pumped M_x magnetometer with miniaturized Cs cell at earth's magnetic field strength (50µT) is investigated. Operation using detuned laser light of high intensity is shown...
PublicationsExploiting extreme coupling to realize a metamaterial perfect absorber
An optical metamaterial which uses the effect of strong coupling between closely spaced nanostructured gold metal plates and a planar gold substrate was realized by means of electron beam lithography and...
PublicationsEfficient Yb laser fibers with low photodarkening by optimization of the core composition
We report on photodarkening (PD) investigations at Yb doped fibers with specific variation of the concentrations of the codopants aluminum and phosphorus, measured during cladding pumping at 915 nm. A...
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