About the Münster Nanofabrication Facility (MNF)

Martin Wolff was selected for second place by Raith for his research using the Raith system in the Münster Nanofabrication Facility (MNF). Wolff, a student in Research Group Schuck, created a waveguide-integrated superconducting nanowire single-photon detector device.

His device is made of three elements: 1) gold contact pads used for electrical connections, 2) a superconducting nanowire placed between the gold pads, which is sensitive to single photons, and 3) a dielectric waveguide coupling structures for coupling light on the chip to the detector. The detection speed of his detectors easily reaches GHz counting rates and offers high efficiencies of over 90%, dark count rates in the mHz regime, and timing uncertainties (jitter) of a few picoseconds over a wide optical window, especially in the telecommunication band.

Raith Nanofabrication Award Winners
Research Group Schuck

"From the outside, the instrument, located on the ground floor of the Center for Soft Nanoscience (SoN) at Münster University, is just a grey cupboard the size of two wardrobes – but inside there is a lot going on. The centrepiece of the equipment is a focused ion beam and a scanning electron microscope. The ion beam enables structures to be “written” in thin layers – for example, to produce circuits on chips. What is special about the instrument is a special ion source with charged gold and silicon atoms. Compared with equipment using gallium ions, which are the ones normally used, this instrument enables the researchers to structure the material more precisely, generate larger-sized structures and thus fill up for example entire wafers, as used in the semiconductor industry. The process also means that many small points can be arranged side by side and joined up with one another. The microscope simultaneously scans the surface of the materials and creates high-resolution images of the molecular structures in order to monitor the process. This type of instrument is the only one of its kind so far in Germany..."

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VELION - A Novel FIB-SEM Nanofabrication Instrument Concept and its Applications in Nanoscale Science and Engineering 

• plasmonic arrays and zero mode waveguides for sensing biological molecules    
• solar absorber arrays    
• color center creation by maskless ion implantation    
• large area photonic structures in diamond    
• and metallic metasurfaces. 

On March 5th, 2020, MNF scientists attended a presentation by Dr. Torsten Richter Product Manager, Raith GmbH, covering the above topics and more

Raith VELION at the MNF
Workshop flyer

"Researchers working in the MNF demonstrate for the first time energy quantization in nanowires made of high-temperature superconductors- where the temperature is brought to the level below which quantum mechanical effects predominate. The results are published in the journal Nature Communications."

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GDSHelpers is a Python-based, easy-to-learn, open-source software package, which allows users to quickly generate arbitrary photonic and other devices. Users can automate pattern generation for nano-structuring and export patterns in GDSII- and OASIS-format (for describing 2D-masks). Currently, the focus is mainly on photonic and superconducting circuitry.

The Python library GDSHelpers holds a growing list of parts, which can be composed into larger circuits.

Python based open source design framework forintegrated nanophotonic and superconductingcircuitry with 2D-3D-hybrid integration.
OSA Continuum Vol. 2, No. 11 /15 November 2019

"Researchers at the University of Münster have now developed an interface that couples light sources for single photons with nanophotonic networks. This interface consists of so-called photonic crystals, i.e. nanostructured dielectric materials that can enhance a certain wavelength range when light passes through. Such photonic crystals are used in many areas of research, but they had not previously been optimized for this type of interface. The researchers took particular care to achieve this feat in a way that allows for replicating the photonic crystals straightforwardly by using established nanofabrication processes."

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The TERA-Fab™ E series is the world’s first beam pen lithography (BPL) tool, which provides the user with a way to prototype functional electronic devices, perform highly-localized photochemistry relevant to biology and medicine, and make the types of architectures traditionally made with photolithography, but in a mask-free fashion and with a diffraction-unlimited, sub-250 nm resolutions. With the E series, the user can rapidly create nanopatterns of any design across square micrometer to tens of square millimeter areas using a wide range of photosensitive materials.

On the 6th of November 2019, MNF scientists had the opportunity to learn more about the TERA-Fab™ E series from Dr. Andrey Ivankin, the chief technology officer and co-founder at TERA-print.

The new state-of-the art molecular printer installed in the Münster Nanofabricaton Facility (MNF) addresses the needs of users working in various fields of nanoscience ranging from biomedicine, material sciences to microelectronics. Allowing for flexible choice and combination of various functional modules, it can cover a wide range of applications and research projects, and has the following features:

• Base printing module with a choice of different printing technologies (ranging from cantilever arrays and soft polymeric stamps to microcapillary pens)
• High-Resolution module for increased patterning control down to the low nanoscale
• Climate module for controlled humidity
• Optical module for in-situ process control and analysis.

On the 4th and 5th of November 2019, MNF scientists participated in a workshop to learn more about this exciting new technology.

The new Zeiss Crossbeam 340 in the Center for Soft Nanoscience (SoN) is ready for use. It comes with Gemini I electron and Gallium Ion Sculptor columns and multi GIS.

More about the Crossbeam

The sputtering system is currently installed in CeNTech can be used for thin film deposition!

More about the sputtering system