Jocelyn Achard
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View article: Enhanced magnetic field sensitivity of shallow NV$^-$ ensembles via high-temperature implantation
Enhanced magnetic field sensitivity of shallow NV$^-$ ensembles via high-temperature implantation Open
Dense and shallow ensembles of negatively charged nitrogen-vacancy centers (NV$^-$) with good optical and spin properties play a key role in the performance enhancement of diamond-based quantum sensors. Ion implantation enables precise con…
View article: Nitrogen-vacancy centers in epitaxial laterally overgrown diamond: towards up-scaling of color center-based quantum technologies
Nitrogen-vacancy centers in epitaxial laterally overgrown diamond: towards up-scaling of color center-based quantum technologies Open
Providing high-quality, single-crystal diamond (SCD) with a large area is desirable for up-scaling quantum technology applications that rely on color centers in diamond. Growth methods aiming to increase the area of SCD are an active resea…
View article: Boron and phosphorus doped diamond: change in the electronic structure post exposure to low pressure deuterium plasma and its effect on the production of negative ions
Boron and phosphorus doped diamond: change in the electronic structure post exposure to low pressure deuterium plasma and its effect on the production of negative ions Open
Negative ion production is of significant interest for materials processing and neutral beam injection systems for magnetic confinement fusion reactors. The surface production mechanism can be required for high current applications. Dielec…
View article: Nitrogen-Vacancy Centers in Epitaxial Laterally Overgrown Diamond: Towards Up-scaling of Color Center-based Quantum Technologies
Nitrogen-Vacancy Centers in Epitaxial Laterally Overgrown Diamond: Towards Up-scaling of Color Center-based Quantum Technologies Open
Providing high-quality, single-crystal diamond (SCD) with a large area is desirable for up-scaling quantum technology applications that rely on color centers in diamond. Growth methods aiming to increase the area of SCD are an active resea…
View article: Growth strategies for widening thick heavily boron-doped (113)-oriented CVD diamond
Growth strategies for widening thick heavily boron-doped (113)-oriented CVD diamond Open
International audience
View article: Rare Earth‐Diamond Hybrid Structures for Optical Quantum Technologies
Rare Earth‐Diamond Hybrid Structures for Optical Quantum Technologies Open
Diamond containing nitrogen‐vacancy centers (NV − ) is one of the most investigated materials for quantum technologies, because of this system's exceptional spin properties. Although the NV − optical transition is very bright, it suffers f…
View article: Measuring negative ion yield and work function from phosphorus doped diamond, boron doped diamond, and graphite in deuterium plasmas
Measuring negative ion yield and work function from phosphorus doped diamond, boron doped diamond, and graphite in deuterium plasmas Open
International audience
View article: Hot ion implantation to create dense NV center ensembles in diamond
Hot ion implantation to create dense NV center ensembles in diamond Open
Creating dense and shallow nitrogen-vacancy (NV) ensembles with good spin properties is a prerequisite for developing diamond-based quantum sensors exhibiting better performance. Ion implantation is a key enabling tool for precisely contro…
View article: Hot ion implantation to create dense NV centre ensembles in diamond
Hot ion implantation to create dense NV centre ensembles in diamond Open
Creating dense and shallow nitrogen vacancy (NV) ensembles with good spin properties, is a prerequisite for developing diamond-based quantum sensors exhibiting better performance. Ion implantation is a key enabling tool for precisely contr…
View article: Microscopic-scale magnetic recording of brain neuronal electrical activity using a diamond quantum sensor
Microscopic-scale magnetic recording of brain neuronal electrical activity using a diamond quantum sensor Open
Quantum sensors using solid state qubits have demonstrated outstanding sensitivity, beyond that possible using classical devices. In particular, those based on colour centres in diamond have demonstrated high sensitivity to magnetic field …
View article: Data of the publication Optimizing ion implantation to create shallow NV centre ensembles in high-quality CVD diamond
Data of the publication Optimizing ion implantation to create shallow NV centre ensembles in high-quality CVD diamond Open
Data of the publication published by IOP under the reference: Midrel Wilfried Ngandeu Ngambou et al 2022 Mater. Quantum. Technol. 2 045001 .
View article: Data of the publication Optimizing ion implantation to create shallow NV centre ensembles in high-quality CVD diamond
Data of the publication Optimizing ion implantation to create shallow NV centre ensembles in high-quality CVD diamond Open
Data of the publication published by IOP under the reference: Midrel Wilfried Ngandeu Ngambou et al 2022 Mater. Quantum. Technol. 2 045001 .
View article: A compact radiofrequency spectrum analyzer based on nitrogen-vacancy centers in diamond
A compact radiofrequency spectrum analyzer based on nitrogen-vacancy centers in diamond Open
International audience
View article: Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa
Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa Open
We investigate the optical properties of silicon-vacancy (SiV) and germanium-vacancy (GeV) color centers in nanodiamonds under hydrostatic pressure up to 180 GPa. The nanodiamonds were synthesized by Si-or Ge-doped plasma-assisted chemical…
View article: All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond
All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond Open
Solid state spins have demonstrated significant potential in quantum sensing with applications including fundamental science, medical diagnostics and navigation. The quantum sensing schemes showing best performance under ambient conditions…
View article: <i>In vitro</i> recording of muscle activity induced by high intensity laser optogenetic stimulation using a diamond quantum biosensor
<i>In vitro</i> recording of muscle activity induced by high intensity laser optogenetic stimulation using a diamond quantum biosensor Open
The detection of physiological activity at the microscopic level is key for understanding the function of biosystems and relating this to their physical structure. Current sensing methods for in vitro study of living tissue often rely on i…
View article: Optimizing ion implantation to create shallow NV centre ensembles in high-quality CVD diamond
Optimizing ion implantation to create shallow NV centre ensembles in high-quality CVD diamond Open
The negatively charged nitrogen-vacancy centre (so-called NV-centre) in diamond is one of the most promising systems for applications in quantum technologies because of the possibility to optically manipulate and read out the spin state of…
View article: Synthesis of High Quality Transparent Nanocrystalline Diamond Films on Glass Substrates Using a Distributed Antenna Array Microwave System
Synthesis of High Quality Transparent Nanocrystalline Diamond Films on Glass Substrates Using a Distributed Antenna Array Microwave System Open
Diamond is a material of choice for the fabrication of optical windows and for protective and anti-reflecting coatings for optical materials. For these kinds of applications, the diamond coating must have a high purity and a low surface ro…
View article: Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa
Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa Open
We investigate the optical properties of silicon-vacancy (SiV) and germanium-vacancy (GeV) color centers in nanodiamonds under hydrostatic pressure up to 180 GPa. The nanodiamonds were synthetized by Si or Ge-doped plasma assisted chemical…
View article: Microscopic-scale recording of brain neuronal electrical activity using a diamond quantum sensor
Microscopic-scale recording of brain neuronal electrical activity using a diamond quantum sensor Open
An important tool in the investigation of the early stages of neurodegenerative disease is the study of dissected living tissue from the brain of an animal model. Such investigations allow the physical structure of individual neurons and n…
View article: Laser stimulation of muscle activity with simultaneous detection using a diamond colour centre biosensor
Laser stimulation of muscle activity with simultaneous detection using a diamond colour centre biosensor Open
The detection of physiological activity at the microscopic level is key for understanding the function of biosystems and relating this to physical structure. Current sensing methods often rely on invasive probes to stimulate and detect act…
View article: Surface production of negative ions from pulse-biased nitrogen doped diamond within a low-pressure deuterium plasma
Surface production of negative ions from pulse-biased nitrogen doped diamond within a low-pressure deuterium plasma Open
The production of negative ions is of significant interest for applications including mass spectrometry, materials surface processing, and neutral beam injection for magnetic confined fusion. Neutral beam injection sources maximise negativ…
View article: Coherent microwave control of a nuclear spin ensemble at room temperature
Coherent microwave control of a nuclear spin ensemble at room temperature Open
We use nominally forbidden electron-nuclear spin transitions in\nnitrogen-vacancy (NV) centers in diamond to demonstrate coherent manipulation\nof a nuclear spin ensemble using microwave fields at room temperature. We show\nthat employing …
View article: Dislocation density reduction using overgrowth on hole arrays made in heteroepitaxial diamond substrates
Dislocation density reduction using overgrowth on hole arrays made in heteroepitaxial diamond substrates Open
The growth of large-area diamond films with low dislocation density is a landmark in the fabrication of diamond-based power electronic devices or high-energy particle detectors. Here, we report the development of a growth strategy based on…
View article: Optimization of a Diamond Nitrogen Vacancy Centre Magnetometer for Sensing of Biological Signals
Optimization of a Diamond Nitrogen Vacancy Centre Magnetometer for Sensing of Biological Signals Open
Sensing of signals from biological processes, such as action potential propagation\nin nerves, are essential for clinical diagnosis and basic understanding of physiology.\nSensing can be performed electrically by placing sensor probes near…