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Work group hybrid fibers

Scientific Profile

The working group concentrates on basic as well as application-oriented questions of light-matter interaction on the basis of hybrid fibers and their application in the fields of biophotonics, life sciences and sensing technology. Hybrid fibers represent a new type of optical fiber, which includes sophisticated materials or photonic elements such to unlock physical effects or applications accessible for fiber optics that were previously inaccessible for fiber optics. Examples of applications lie within fields of nonlinear light generation in optofluidic fibers, single virus detection, plasmonic near-field probes, bioanalytics, meta-surfaces, optofluidic sensors and novel microstructured hollow core fiber structures for waveguiding in hitherto unused spectral domains such as the ultraviolet and the mid-infrared.

Research topics

- Non-linear light generation using optofluidic fibers

- Detection and trapping of single diffusing micro- and/or nanoobjects in fibers or at the end face

- End face functionalization with  nanostructures (e.g. metasurfaces)

- Hollow core fibers and waveguides

- Microstructured fibers, photonic crystal fibers, light cages

The access to the mentioned research topics is mainly provided by the unique infrastructure and expertise available at Leibniz-IPHT in the field of fiber optics and biophotonics, aiming to identify new physical effects and open up new fields of application.

Application fields

- Highly coherent light sources in a variety of spectral ranges (UV, VIS, NIR, MIR)

- Bioanalytics and -sensing (e.g. analysis of single biologically relevant nano-objects in aqueous solution)

- Functionalized fiber end faces (e.g. coupling into fibers at extremely high angles)

 - Fiber Integrated Spectroscopy

- Near-field microscopy

Topics

 Nonlinear light generation by means of optofluidic fibers

Due to their ultrawide transparency and a high and strongly retarded nonlinearity, liquids in fibers offer a novel platform for soliton-based non-linear light generation. In particular the stimulation of new solitonic states and applications as a light source for the mid infrared represent the main focus of the current activities of the group.

 Individual detection of nanoobjects

The detection and optical analysis of single nanoobjects, such as viruses or nanoparticles, play an increasingly important role in life sciences and disease diagnostics. In the Research Group, current research targets elastic light scattering in nanobore fibers to detected freely diffusing nanoobjects such as viruses with diameters in the sub-20nm domain.

 Nanostructures on fiber end faces

One of the most active and fascinating areas within nanophotonics are metasurfaces that allow the creation of a wide variety of optical components, such as ultraflat planar lenses or plasmonic particle traps. The group currently focuses on inverse metasurfaces, plasmonic particle traps and quasi-electrostatic Paul traps in combination with optical fibers.

 Plasmonic fibers

The connection of plasmonics and optical fibers allows the integration of nanoprobes based on a flexible waveguide platform. The group focuses on the introduction of plasmonic nanoparticles into various types of microstructured fibers to effectively detect, e.g., pathogens. Furthermore, plasmonic nanoprobes are generated at fiber end faces in order to break the current resolution limit of near-field microscopy.

 Hollow core fibers

Hollow core fibers represent one of the most active research fields with fiber optics. Currently, new concepts such as cladding materials made from high-density metallic nanowire lattices (so-called "unlimited" metamaterials), hollow-core fibers with tailored disorder in the cladding or free-standing nanowire arrays with defect cores are been investigated.

 

The group is located at IPHT, which has a unique infrastructure for the production and characterization of nano- and microstructured optical fibers within Europe. The group is worldwide connections and has close cooperation with partners at the local university.

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