A5021879783- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- Force Microscopy Techniques and Applications
- High-pressure geophysics and materials
- Magnetic properties of thin films
- Mechanical and Optical Resonators
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Atomic and Subatomic Physics Research
- Semiconductor Quantum Structures and Devices
- Photonic and Optical Devices
- Magnetic and transport properties of perovskites and related materials
- 2D Materials and Applications
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Semiconductor materials and devices
- Magnetic Field Sensors Techniques
- Characterization and Applications of Magnetic Nanoparticles
- Graphene research and applications
- Magnetic Properties and Applications
- Photonic Crystals and Applications
- Metal and Thin Film Mechanics
- Cold Atom Physics and Bose-Einstein Condensates
University of Basel
2016-2025
Swiss Nanoscience Institute
2019-2023
Psychology Software Tools (United States)
2021
Institut Fresnel
2020
Centrale Marseille
2020
Centre National de la Recherche Scientifique
2020
Aix-Marseille Université
2020
Laboratoire de Photonique Quantique et Moléculaire
2014
Harvard University
2011-2013
Harvard University Press
2012
The isolated electronic spin system of the nitrogen-vacancy (NV) centre in diamond offers unique possibilities to be employed as a nanoscale sensor for detection and imaging weak magnetic fields. Magnetic with nanometric resolution field capabilities nanotesla range are enabled by atomic-size exceptionally long spin-coherence times this naturally occurring defect. exciting perspectives that ensue from these characteristics have triggered vivid experimental activities emerging 'NV...
The mesoscopic spin system formed by the 10E4-10E6 nuclear spins in a semiconductor quantum dot offers unique setting for study of many-body physics condensed matter. dynamics this and its coupling to electron is fundamentally different from bulk counter-part as well that atoms due increased fluctuations result reduced dimensions. In recent years, interest studying systems their confined has been fueled direct implication possible applications such information processing fascinating...
We report on single electronic spins coupled to the motion of mechanical resonators by a novel mechanism based crystal strain. Our device consists single-crystal diamond cantilevers with embedded nitrogen-vacancy center spins. Using optically detected electron spin resonance, we determine unknown spin-strain coupling constants and demonstrate that our system resides well within resolved sideband regime. realize strengths exceeding 10 MHz under driving show has potential reach strong...
Abstract Magnetic random access memory schemes employing magnetoelectric coupling to write binary information promise outstanding energy efficiency. We propose and demonstrate a purely antiferromagnetic (AF-MERAM) that offers remarkable 50-fold reduction of the writing threshold compared with ferromagnet-based counterparts, is robust against magnetic disturbances exhibits no ferromagnetic hysteresis losses. Using antiferromagnet Cr 2 O 3 , we reliable isothermal switching via gate voltage...
The recent discovery of ferromagnetism in 2D van der Waals (vdw) crystals has generated widespread interest, owing to their potential for fundamental and applied research. Advancing the understanding applications vdw magnets requires methods quantitatively probe magnetic properties on nanoscale. Here, we report study atomically thin magnet CrI$_3$ down individual monolayers using scanning single-spin magnetometry, demonstrate quantitative, nanoscale imaging magnetisation, localised defects...
We report the observation of stable optical transitions in nitrogen-vacancy (NV) centers created by ion implantation. Using a combination high temperature annealing and subsequent surface treatment, we reproducibly create NV with zero-phonon lines (ZPL) exhibiting spectral diffusion that is close to lifetime-limited line width. The residual further reduced using resonant pumping maintain NV– charge state. This approach allows for placement excellent coherence well-defined device layer, which...
We demonstrate dynamical nuclear-spin polarization in the absence of an external magnetic field by resonant circularly polarized optical excitation a single electron or hole charged quantum dot. Optical pumping spin induces effective inhomogeneous (Knight) that determines direction along which nuclear spins could polarize and enables cooling suppressing depolarization induced dipole-dipole interactions. Our experiments constitute first step towards measurement Overhauser field.
Diamond is a unique material with exceptional physical and chemical properties that offers potential for the realization of high-performance devices novel functionalities. For example diamond's high refractive index, transparency over wide wavelength range, large Raman gain are interest implementation photonic devices. Recently, atom-like impurities in diamond emerged as an system quantum information processing, sensing networks. these other applications, it essential to develop integrated...
The electronic spin of the nitrogen vacancy (NV) center in diamond forms an atomically sized, highly sensitive sensor for magnetic fields. To harness full potential individual NV centers sensing with high sensitivity and nanoscale spatial resolution, have to be incorporated into scanning probe structures enabling controlled close proximity sample surface. Here, we present optimized procedure fabricate single-crystal, all-diamond probes starting from commercially available show a efficient...
The nitrogen-vacancy (NV) center in diamond has an optically addressable, highly coherent spin. However, NV even high quality single-crystalline material is a very poor source of single photons: extraction out the high-index inefficient, emission photons represents just few per cent total emission, and decay time large. In principle, all three problems can be addressed with resonant microcavity. practice, it proved difficult to implement this concept: photonic engineering hinges on...
Devices relying on microwave circuitry form a cornerstone of many classical and emerging quantum technologies. A capability to provide in-situ, noninvasive direct imaging the fields above such devices would be powerful tool for their function failure analysis. In this work, we build recent achievements in magnetometry using ensembles nitrogen vacancy centres diamond, present widefield microscope with few-micron resolution over millimeter-scale field view, 130nT/sqrt-Hz amplitude sensitivity,...
Abstract Magnetism in two-dimensional materials reveals phenomena distinct from bulk magnetic crystals, with sensitivity to charge doping and electric fields monolayer bilayer van der Waals magnet CrI 3 . Within the class of layered magnets, semiconducting CrSBr stands out by featuring stability under ambient conditions, correlating excitons order thus providing strong magnon-exciton coupling, exhibiting peculiar magneto-optics exciton-polaritons. Here, we demonstrate that both exciton...
Abstract Since their first observation in 2017, atomically thin van der Waals (vdW) magnets have attracted significant fundamental, and application-driven attention. However, low ordering temperatures, T c , sensitivity to atmospheric conditions difficulties preparing clean large-area samples still present major limitations further progress, especially amongst magnetic semiconductors. The remarkably stable, high- vdW magnet CrSBr has the potential overcome these key shortcomings, but its...
We present measurements of the buildup and decay nuclear spin polarization in a single semiconductor quantum dot. Our experiment shows that we polarize nuclei few milliseconds, while their dynamics depends drastically on external parameters. show electron can very efficiently depolarize spins milliseconds whereas absence lifetime is scale seconds. This further enhanced by 1-2 orders magnitude quenching nonsecular dipole-dipole interactions with magnetic field 1 mT.