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Taper Device for Tolerant Coupling of Free-Space Optical Beams Into Single-Mode Fiber
A new device for improving the free-space optical monitoring and coupling into a single mode fiber is proposed. It consists of a fiber taper, which can easily be drawn from a suitable fiber with large...
PublicationsMesoporous silica particle embedded functional graphene oxide as an efficient platform for urea biosensing
The mesoporous silica particle embedded graphene oxide (GO) hybrid system is a promising platform for electrochemical biosensing owing to its large 2-dimensional structure, fast electron transfer kinetics,...
PublicationsOptical Phase Refractometer Based on Post-Processed Interferometric Tip Sensors
An interferometric tip sensor based on the postprocess of a special design double-cladding optical fiber is proposed. Due to the sensing head design, it is sensitive to environmental variations. In order...
PublicationsFiber Bragg Gratings in the Visible Spectral Range With Ultraviolet Femtosecond Laser Inscription
In this letter, we investigate the inscription of fiber Bragg gratings in the visible spectral range using deep ultraviolet femtosecond laser exposure and two-beam interferometry. The properties of first-order...
PublicationsClassification and prediction of HCC tissues by Raman imaging with identification of fatty acids as potential lipid biomarkers
Purpose Patients with hepatocellular carcinoma (HCC) can only be treated curatively at early stages and then have a favorable prognosis of this often fatal disease. For this reason, an early detection...
PublicationsStructural properties of magnetic nanoparticles determine their heating behavior – an estimation of the in vivo heating potential
Magnetically induced heating of magnetic nanoparticles (MNP) in an alternating magnetic field (AMF) is a promising minimal invasive tool for a localized tumor treatment by sensitizing or killing tumor...
PublicationsLocalisation microscopy with quantum dots using non-negative matrix factorisation
We propose non-negative matrix factorisation with iterative restarts (iNMF) to model a noisy dataset of highly overlapping fluorophores with intermittent intensities. We can recover high-resolution images...
PublicationsRaman Imaging with a Fiber-Coupled Multichannel Spectrograph
Until now, spatial-resolved Raman Spectroscopy required a time-consuming step by step scanning of the sample. Here we present a new technique, which allows the capture of an entire Raman image within one...
PublicationsReflectivity enhanced refractive index sensor based on a fiber-integrated Fabry-Perot microresonator
We discuss a fiber-integrated refractive index sensor with strongly improved detection performance. The resonator has been implemented by means of focused-ion beam milling of a step index fiber and shows...
PublicationsNanoparticle and nanosphere mask for etching of ITO nanostructures and their reflection properties
Au nanoparticles and polystyrene nanospheres were used as mask for plasma etching of indium tin oxide (ITO) layer. By reactive ion etching (RIE) processes, the morphology of polystyrene nanospheres can...
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