A5068874658- Diamond and Carbon-based Materials Research
- Force Microscopy Techniques and Applications
- Electronic and Structural Properties of Oxides
- Semiconductor materials and devices
- High-pressure geophysics and materials
- Quantum and electron transport phenomena
- Ion-surface interactions and analysis
- Advanced Fiber Laser Technologies
- Metal and Thin Film Mechanics
- Carbon Nanotubes in Composites
- Analytical Chemistry and Sensors
- Quantum, superfluid, helium dynamics
- Nonlinear Optical Materials Studies
- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
University of Stuttgart
2011-2018
Center for Integrated Quantum Science and Technology
2016-2018
University of Tsukuba
2013
Sumitomo Electric Industries (Japan)
2013
Measuring local temperature with a spatial resolution on the order of few nanometers has wide range applications from semiconductor industry over material to life sciences. When combined precision measurement it promises give excess small changes caused e.g. by chemical reactions or biochemical processes. However, nanoscale measurements and have excluded each other so far owing physical processes used for limited stability probes. Here we experimentally demonstrate novel sensing technique...
Synthetic diamond production is key to the development of quantum metrology and information applications diamond. The major sensor qubit candidate in nitrogen-vacancy (NV) color center. This lattice defect comes four different crystallographic orientations leading an intrinsic inhomogeneity among NV centers that undesirable some applications. Here, we report a microwave plasma-assisted chemical vapor decomposition (MPCVD) growth technique on (111)-oriented substrates yields perfect alignment...
Single charge detection with nanoscale spatial resolution in ambient conditions is a current frontier metrology that has diverse interdisciplinary applications. Here, such single demonstrated using two nitrogen-vacancy (NV) centers diamond. One NV center employed as sensitive electrometer to detect the change electric field created by displacement of electron resulting from optical switching other between its neutral (NV$^0$) and negative (NV$^-$) states. As consequence, our measurements...
Abstract In quantum sensing, precision is typically limited by the maximum time interval over which phase can be accumulated. Memories have been used to enhance this beyond coherence lifetime and thus gain precision. Here, we demonstrate that using a memory an increased sensitivity also achieved. To end, use entanglement in hybrid spin system comprising sensing qubit associated with single nitrogen-vacancy centre diamond. With retain full state even after decay of sensor, enables coherent...
\emph{Ab initio} computation of molecular properties is one the most promising applications quantum computing. While this problem widely believed to be intractable for classical computers, efficient algorithms exist which have potential vastly accelerate research throughput in fields ranging from material science drug discovery. Using a solid-state register realized nitrogen-vacancy (NV) defect diamond, we compute bond dissociation curve minimal basis helium hydride cation, HeH$^+$....
Abstract The fabrication of scalable quantum devices in diamond relies on the ability to produce optical centres with a high spatial resolution. Ion implantation is most powerful technique for placing impurity atoms matrix. Even though shallow can be produced resolution below 20 nm, deep may preferred generally better overall properties. However, focusing ion beams MeV range hardly achieved 1 µm. We present here novel approach by implanting ions through mask high‐aspect‐ratio nano‐channels...
The negatively charged nitrogen-vacancy (NV-) centre in diamond has many exciting applications quantum nano-metrology, including magnetometry, electrometry, thermometry and piezometry. Indeed, it is possible for a single NV- to measure the complete three-dimensional vector of local electric field or position fundamental charge ambient conditions. However, order achieve such measurements, near knowledge orientation centre's defect structure required. Here, we demonstrate an optically detected...
We demonstrate the coupling of single color centers in diamond to plasmonic and dielectric photonic structures realize novel nanophotonic devices. Nanometer spatial control creation is achieved by implantation nitrogen atoms through high-aspect-ratio channels a mica mask. Enhanced broadband single-photon emission demonstrated nitrogen–vacancy resonators, such as metallic nanoantennas. Improved photon-collection efficiency directed solid immersion lenses micropillar cavities. Thereafter,...
Coherently coupled pairs or multimers of nitrogen-vacancy defect electron spins in diamond have many promising applications especially quantum information processing (QIP) but also nanoscale sensing applications. Scalable registers spin qubits are essential to the progress QIP. Ion implantation is only known technique able produce close enough allow coupling via dipolar interaction. Although several competing methods been proposed increase resulting resolution ion implantation, reliable...
The individual and coherent control of solid-state based electron spins is important covering fields from quantum information processing metrology to material research medical imaging. Especially for the in nanoscale networks, generation strong, fast localized magnetic crucial. Highly-engineered devices that demonstrate most desired features are found nanometer size writers hard disk drives (HDD). Currently, however, their operation, particular, comes at cost excessive noise. Here, we...