294 citations · 1.3k across the 15 of their papers we have counts for
15 papers
On the molecular mechanism behind the bubble rise velocity jump discontinuity in viscoelastic liquids
Dieter Bothe, Matthias Niethammer, Christian Pilz +1
Bubbles rising in viscoelastic liquids may exhibit a jump discontinuity of the rise velocity as a critical bubble volume is exceeded. The phenomenon has been extensively investigat…
Narrow inhomogeneous distribution of spin-active emitters in silicon carbide
Roland Nagy, Durga Bhaktavatsala Rao Dasari, Charles Babin +13
Optically active solid-state spin registers have demonstrated their unique potential in quantum computing, communication and sensing. Realizing scalability and increasing applicati…
Numerical simulation of non-isothermal viscoelastic flows at high Weissenberg numbers using a finite volume method on general unstructured meshes
Stefanie Meburger, Matthias Niethammer, Dieter Bothe +1
In this numerical study, an original approach to simulate non-isothermal viscoelastic fluid flows at high Weissenberg numbers is presented. Stable computations over a wide range of…
Bright single photon sources in lateral silicon carbide light emitting diodes
Matthias Widmann, Matthias Niethammer, Takahiro Makino +7
Single-photon emitting devices have been identified as an important building block for applications in quantum information and quantum communication. They allow to transduce and co…
Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide
Naoya Morioka, Charles Babin, Roland Nagy +17
Quantum systems combining indistinguishable photon generation and spin-based quantum information processing are essential for remote quantum applications and networking. However, i…
Electrical charge state manipulation of single silicon vacancies in a silicon carbide quantum optoelectronic device
Matthias Widmann, Matthias Niethammer, Dmitry Yu. Fedyanin +14
Colour centres with long-lived spins are established platforms for quantum sensing and quantum information applications. Colour centres exist in different charge states, each of th…
Coherent electrical readout of defect spins in 4H-SiC by photo-ionization at ambient conditions
Matthias Niethammer, Matthias Widmann, Torsten Rendler +11
Quantum technology relies on proper hardware, enabling coherent quantum state control as well as efficient quantum state readout. In this regard, wide-bandgap semiconductors are an…
High-fidelity spin and optical control of single silicon vacancy centres in silicon carbide
Roland Nagy, Matthias Niethammer, Matthias Widmann +14
Optically interfaced spins in the solid promise scalable quantum networks. Robust and reliable optical properties have so far been restricted to systems with inversion symmetry. He…
Robust and efficient control of spin probes in a complex (biological) environment. Towards sensing of fast temperature fluctuations
Philipp Konzelmann, Torsten Rendler, Ville Bergholm +9
We present an optimized scheme for nanoscale measurements of temperature in a complex environment using the nitrogen-vacancy center in nanodiamonds. To this end we combine a Ramsey…
An Extended Volume of Fluid Method and its Application to Single Bubbles Rising in a Viscoelastic Liquid
Matthias Niethammer, Günter Brenn, Holger Marschall +1
An extended volume of fluid method is developed for two-phase direct numerical simulations of systems with one viscoelastic and one Newtonian phase. A complete set of governing equ…
Quantum properties of dichroic silicon vacancies in silicon carbide
Roland Nagy, Matthias Widmann, Matthias Niethammer +12
The controlled generation and manipulation of atom-like defects in solids has a wide range of applications in quantum technology. Although various defect centres have displayed pro…
A numerical stabilization framework for viscoelastic fluid flow using the finite volume method on general unstructured meshes
Matthias Niethammer, Holger Marschall, Christian Kunkelmann +1
A robust finite volume method for viscoelastic flow analysis on general unstructured meshes is developed. It is built upon a general-purpose stabilization framework for high Weisse…
Scalable Quantum Photonics with Single Color Centers in Silicon Carbide
Marina Radulaski, Matthias Widmann, Matthias Niethammer +9
Silicon carbide is a promising platform for single photon sources, quantum bits (qubits) and nanoscale sensors based on individual color centers. Towards this goal, we develop a sc…
Vector magnetometry using silicon vacancies in 4H-SiC at ambient conditions
Matthias Niethammer, Matthias Widmann, Sang-Yun Lee +6
Point defects in solids promise precise measurements of various quantities. Especially magnetic field sensing using the spin of point defects has been of great interest recently. W…
Vector magnetometry based on S=3/2 electronic spins
Sang-Yun Lee, Matthias Niethammer, Jörg Wrachtrup
Electronic spin systems with S>1/2 provide an efficient method for DC vector magnetometry, since the conventional electron spin resonance spectra at a given magnetic field reflect…