Publications (75)
Diamond spin sensors: A new way to probe nanomagnetism
J. -P. Tetienne, L. P. McGuinness, V. Jacques
Studies of individual quantum systems, which have led to considerable progress in our understanding of quantum physics, have traditionally been associated with atomic gases. In the…
Laser-Induced Charge-Density-Wave Transient Depinning in Chromium
V. Jacques, C. Laulhé, N. Moisan +2
We report here on time-resolved x-ray diffraction measurements following femtosecond laser excitation in pure bulk chromium. Comparing the evolution of incommensurate charge-densit…
Magnetometry with nitrogen-vacancy defects in diamond
L. Rondin, J. -P. Tetienne, T. Hingant +3
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 of wea…
A planar defect spin sensor in a two-dimensional material susceptible to strain and electric fields
P. Udvarhelyi, T. Clua-Provost, A. Durand +6
The boron-vacancy spin defect () in hexagonal boron nitride (hBN) has a great potential as a quantum sensor in a two-dimensional material that can directly p…
Single-shot readout of multiple nuclear spin qubits in diamond under ambient conditions
A. Dréau, P. Spinicelli, J. R. Maze +2
We use the electronic spin of a single Nitrogen-Vacancy (NV) defect in diamond to observe the real-time evolution of neighboring single nuclear spins under ambient conditions. Usin…
Photoluminescence of single colour defects in 50 nm diamond nanocrystals
F. Treussart, V. Jacques, E. Wu +3
We used optical confocal microscopy to study optical properties of diamond 50 nm nanocrystals first irradiated with an electron beam, then dispersed as a colloidal solution and fin…
A journey into the tuneable antiferromagnetic spin textures of BiFeO3
A. Haykal, J. Fischer, W. Akhtar +10
Antiferromagnetic thin films are currently generating considerable excitement for low dissipation magnonics and spintronics. However, while tuneable antiferromagnetic textures form…
Storage and Retrieval of a Microwave Field in a Spin Ensemble
Y. Kubo, I. Diniz, A. Dewes +7
We report the storage and retrieval of a small microwave field from a superconducting resonator into collective excitations of a spin ensemble. The spins are nitrogen-vacancy cente…
Towards a spin-ensemble quantum memory for superconducting qubits
C. Grezes, Y. Kubo, B. Julsgaard +15
This article reviews efforts to build a new type of quantum device, which combines an ensemble of electronic spins with long coherence times, and a small-scale superconducting quan…
Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
V. Jacques, P. Neumann, J. Beck +7
We report a versatile method to efficiently polarize single nuclear spins in diamond, which is based on optical pumping of a single NV color center and mediated by a level-anti cro…
CVD diamond single crystals with NV centres: a review of material synthesis and technology for quantum sensing applications
J. Achard, V. Jacques, A. Tallaire
Diamond is a host for a wide variety of colour centres that have demonstrated outstanding optical and spin properties. Among them, the nitrogen-vacancy (NV) centre is by far the mo…
Optimal architecture for diamond-based wide-field thermal imaging
R. Tanos, W. Akhtar, S. Monneret +11
Nitrogen-Vacancy centers in diamond possess an electronic spin resonance that strongly depends on temperature, which makes them efficient temperature sensor with a sensitivity down…
High resolution spectroscopy of single NV defects coupled with nearby C nuclear spins in diamond
A. Dréau, J. -R. Maze, M. Lesik +2
We report a systematic study of the hyperfine interaction between the electron spin of a single nitrogen-vacancy (NV) defect in diamond and nearby C nuclear spins, by using…
Avoiding power broadening in optically detected magnetic resonance of single NV defects for enhanced DC-magnetic field sensitivity
A. Dréau, M. Lesik, L. Rondin +4
We report a systematic study of the magnetic field sensitivity of a magnetic sensor based on a single Nitrogen-Vacancy (NV) defect in diamond, by using continuous optically detecte…
Polarization properties of single photons emitted by nitrogen-vacancy defect in diamond at low temperature
F. Kaiser, V. Jacques, A. Batalov +3
In this report, the polarization properties of the photoluminescence emitted by single nitrogen-vacancy (NV) color centers in diamond are investigated using resonant excitation at…
Effect of inter-system crossing rates and optical illumination on the polarization of nuclear spins nearby nitrogen-vacancy centers
H. Duarte, H. T. Dinani, V. Jacques +1
Several efforts have been made to polarize the nearby nuclear environment of nitrogen vacancy (NV) centers for quantum metrology and quantum information applications. Different met…
Skyrmion morphology in ultrathin magnetic films
I. Gross, W. Akhtar, A. Hrabec +8
Nitrogen-vacancy magnetic microscopy is employed in quenching mode as a non-invasive, high resolution tool to investigate the morphology of isolated skyrmions in ultrathin magnetic…
Direct measurement of interfacial Dzyaloshinskii-Moriya interaction in X/CoFeB/MgO heterostructures with a scanning-NV magnetometer
I. Gross, L. J. MartÃnez, J. -P. Tetienne +11
The Dzyaloshinskii-Moriya Interaction (DMI) has recently attracted considerable interest owing to its fundamental role in the stabilization of chiral spin textures in ultrathin fer…
Stray-field imaging of magnetic vortices with a single diamond spin
L. Rondin, J. P. Tetienne, S. Rohart +5
Despite decades of advances in magnetic imaging, obtaining direct, quantitative information with nanometer scale spatial resolution remains an outstanding challenge. Recently, a ne…
Low temperature optical characterization of near infrared single photon emitters in nanodiamonds
P. Siyushev, V. Jacques, I. Aharonovich +8
In this paper, we study the optical properties of single defects emitting in the near infrared in nanodiamonds at liquid helium temperature. The nanodiamonds are synthesized using…
Decoherence of V spin defects in monoisotopic hexagonal boron nitride
A. Haykal, R. Tanos, N. Minotto +11
Spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of flexible two-dimensional quantum sensing platforms. Here we rely on hBN crystals isoto…
Current-induced nucleation and dynamics of skyrmions in a Co-based Heusler alloy
W. Akhtar, A. Hrabec, S. Chouaieb +9
We demonstrate room-temperature stabilization of dipolar magnetic skyrmions with diameters in the range of nm in a single ultrathin layer of the Heusler alloy CoFeAl (CFA…
Surface-induced charge state conversion of nitrogen-vacancy defects in nanodiamonds
L. Rondin, G. Dantelle, A. Slablab +9
We present a study of the charge state conversion of single nitrogen-vacancy (NV) defects hosted in nanodiamonds (NDs). We first show that the proportion of negatively-charged NV$^…
Coherence of single spins coupled to a nuclear spin bath of varying density
N. Mizuochi, P. Neumann, F. Rempp +9
The dynamics of single electron and nuclear spins in a diamond lattice with different 13C nuclear spin concentration is investigated. It is shown that coherent control of up to thr…
Coherent population trapping of a single nuclear spin under ambient conditions
P. Jamonneau, G. Hétet, A. Dréau +2
Coherent control of quantum systems has far-reaching implications in quantum engineering. In this context, coherent population trapping (CPT) involving dark resonances has played a…
NV-center imaging of bubble domains in a 6 Ã film of cobalt with perpendicular magnetization
J. -P. Tetienne, T. Hingant, L. Rondin +6
We employ a scanning NV-center microscope to perform stray field imaging of bubble magnetic domains in a perpendicularly magnetized Pt/Co/AlOx trilayer with 6 Ã of Co. The stray fi…
Efficient single photon emission from a high-purity hexagonal boron nitride crystal
L. J. MartÃnez, T. Pelini, V. Waselowski +4
Among a variety of layered materials used as building blocks in van der Waals heterostructures, hexagonal boron nitride (hBN) appears as an ideal platform for hosting optically-act…
Quenching nitrogen-vacancy center photoluminescence with infrared pulsed laser
N. D. Lai, O. Faklaris, D. Zheng +4
Diamond nanocrystals containing Nitrogen-Vacancy (NV) color centers have been used in recent years as fluorescent probes for near-field and cellular imaging. In this work we report…
Characterization of room-temperature in-plane magnetization in thin flakes of CrTe with a single spin magnetometer
F. Fabre, A. Finco, A. Purbawati +5
We demonstrate room-temperature ferromagnetism with in-plane magnetic anisotropy in thin flakes of the CrTe van der Waals ferromagnet. Using quantitative magnetic imaging with…
Electron spin resonance detected by a superconducting qubit
Y. Kubo, I. Diniz, C. Grezes +14
A new method for detecting the magnetic resonance of electronic spins at low temperature is demonstrated. It consists in measuring the signal emitted by the spins with a supercondu…
Real-space imaging of non-collinear antiferromagnetic order with a single spin magnetometer
I. Gross, W. Akhtar, V. Garcia +14
While ferromagnets are at the heart of daily life applications, their large magnetization and resulting energy cost for switching bring into question their suitability for reliable…
Spin defects in hexagonal boron nitride as two-dimensional strain sensors
Z. Mu, Z. Zhang, J. Fraunié +5
Lattice deformation is a powerful way to engineer the properties of two-dimensional (2D) materials, making their precise measurement an important challenge for both fundamental sci…
Isotopic control of the boron-vacancy spin defect in hexagonal boron nitride
T. Clua-Provost, A. Durand, Z. Mu +12
We report on electron spin resonance (ESR) spectroscopy of boron-vacancy (V) centers hosted in isotopically-engineered hexagonal boron nitride (hBN) crystals. We first…
Optically-active spin defects in few-layer thick hexagonal boron nitride
A. Durand, T. Clua-Provost, F. Fabre +11
Optically-active spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of two-dimensional quantum sensing units offering optimal proximity to t…
Magnetic imaging under high pressure with a spin-based quantum sensor integrated in a van der Waals heterostructure
Z. Mu, J. Fraunié, A. Durand +15
Pressure is a powerful thermodynamic parameter for tuning the magnetic properties of van der Waals magnets owing to their weak interlayer bonding. However, local magnetometry measu…
Competition between electric field and magnetic field noise in the decoherence of a single spin in diamond
P. Jamonneau, M. Lesik, J. P. Tetienne +12
We analyze the impact of electric field and magnetic field fluctuations in the decoherence of the electronic spin associated with a single nitrogen-vacancy (NV) defect in diamond b…
Second-harmonic generation from coupled plasmon modes in a single dimer of gold nanospheres
A. Slablab, L. Le Xuan, M. Zielinski +4
We show that a dimer made of two gold nanospheres exhibits a remarkable efficiency for second-harmonic generation under femtosecond optical excitation. The detectable nonlinear emi…
Nanoscale magnetic field mapping with a single spin scanning probe magnetometer
L. Rondin, J. -P. Tetienne, P. Spinicelli +7
We demonstrate quantitative magnetic field mapping with nanoscale resolution, by applying a lock-in technique on the electron spin resonance frequency of a single nitrogen-vacancy…
Magnetic-field-dependent photodynamics of single NV defects in diamond: Application to qualitative all-optical magnetic imaging
J. -P. Tetienne, L. Rondin, P. Spinicelli +4
Magnetometry and magnetic imaging with nitrogen-vacancy (NV) defects in diamond rely on the optical detection of electron spin resonance (ESR). However, this technique is inherentl…
Growth of rhombohedral boron nitride crystals using an iron flux
W. Desrat, M. Moret, J. Plo +7
We report the growth of high quality rhombohedral boron nitride (rBN) crystals by the iron flux method at atmospheric pressure. In contrast to the lamellar structure of standard he…
Quantitative study of the response of a single NV defect in diamond to magnetic noise
M. Rollo, A. Finco, R. Tanos +4
The nitrogen-vacancy (NV) defect in diamond is an efficient quantum sensor of randomly fluctuating signals via relaxometry measurements. In particular, the longitudinal spin relaxa…
Engineered arrays of NV color centers in diamond based on implantation of CN- molecules through nanoapertures
P. Spinicelli, A. Dréau, L. Rondin +9
We report a versatile method to engineer arrays of nitrogen-vacancy (NV) color centers in dia- mond at the nanoscale. The defects were produced in parallel by ion implantation thro…
Cavity-enhanced zero-phonon emission from an ensemble of G centers in a silicon-on-insulator microring
B. Lefaucher, J. -B. Jager, V. Calvo +13
We report successful incorporation of an ensemble of G centers in silicon-on-insulator (SOI) microrings using ion implantation and conventional nanofabrication. The coupling betwee…
Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble
Y. Kubo, C. Grezes, A. Dewes +15
We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is cohere…
Coherent Population Trapping with a controlled dissipation: applications in optical metrology
L. Nicolas, T. Delord, P. Jamonneau +4
We analyze the properties of a pulsed Coherent Population Trapping protocol that uses a controlled decay from the excited state in a -level scheme. We study this problem analyt…
Low temperature studies of the excited-state structure of Nitrogen-Vacancy color centers in diamond
A. Batalov, V. Jacques, F. Kaiser +7
We report a study of the 3E excited-state structure of single nitrogen-vacancy (NV) defects in diamond, combining resonant excitation at cryogenic temperatures and optically detect…
Preferential orientation of NV defects in CVD diamond films grown on (113) substrates
M. Lesik, T. Plays, A. Tallaire +9
Thick CVD diamond layers were successfully grown on (113)-oriented substrates. They exhibited smooth surface morphologies and a crystalline quality comparable to (100) electronic g…
Excited-state spectroscopy of single NV defects in diamond using optically detected magnetic resonance
P. Neumann, R. Kolesov, V. Jacques +8
Using pulsed optically detected magnetic resonance techniques, we directly probe electron-spin resonance transitions in the excited-state of single Nitrogen-Vacancy color centers i…
The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry
J. -P. Tetienne, T. Hingant, L. J. Martinez +13
The recent observation of current-induced domain wall (DW) motion with large velocity in ultrathin magnetic wires has opened new opportunities for spintronic devices. However, ther…
Multi-mode storage and retrieval of microwave fields in a spin ensemble
C. Grezes, B. Julsgaard, Y. Kubo +13
A quantum memory at microwave frequencies, able to store the state of multiple superconducting qubits for long times, is a key element for quantum information processing. Electroni…
Boron and nitrogen isotope effects on hexagonal boron nitride properties
E. Janzen, H. Schutte, J. Plo +8
The unique physical, mechanical, chemical, optical, and electronic properties of hexagonal boron nitride (hBN) make it a promising two-dimensional material for electronic, optoelec…
Magnetic imaging with spin defects in hexagonal boron nitride
P. Kumar, F. Fabre, A. Durand +13
Optically-active spin defects hosted in hexagonal boron nitride (hBN) are promising candidates for the development of a two-dimensional (2D) quantum sensing unit. Here, we demonstr…
Storage and retrieval of microwave fields at the single-photon level in a spin ensemble
C. Grezes, B. Julsgaard, Y. Kubo +13
We report the storage of microwave pulses at the single-photon level in a spin-ensemble memory consisting of NV centers in a diamond crystal coupled to a superconducting…
Illustration of quantum complementarity using single photons interfering on a grating
V. Jacques, N. D. Lai, A. Dreau +5
A recent experiment performed by S. S. Afshar et al. has been interpreted as a violation of Bohr's complementarity principle between interference visibility and which-path informat…
Scalable quantum register based on coupled electron spins in a room temperature solid
P. Neumann, R. Kolesov, B. Naydenov +12
Realization of devices based on quantum laws might lead to building processors that outperform their classical analogues and establishing unconditionally secure communication proto…
Probing the dynamics of a nuclear spin bath in diamond through time-resolved central spin magnetometry
A. Dréau, P. Jamonneau, O. Gazzano +4
Using fast electron spin resonance spectroscopy of a single nitrogen-vacancy defect in diamond, we demonstrate real-time readout of the Overhauser field produced by its nuclear spi…
Integrated Diamond Optics for Single Photon Detection
P. Siyushev, F. Kaiser, V. Jacques +8
Optical detection of single defect centers in the solid state is a key element of novel quantum technologies. This includes the generation of single photons and quantum information…
Spin relaxometry of single nitrogen-vacancy defects in diamond nanocrystals for magnetic noise sensing
J. -P. Tetienne, T. Hingant, L. Rondin +7
We report an experimental study of the longitudinal relaxation time () of the electron spin associated with single nitrogen-vacancy (NV) defects hosted in nanodiamonds (ND). W…
Magnetic imaging with an ensemble of Nitrogen Vacancy centers in diamond
M. Chipaux, A. Tallaire, J. Achard +5
The nitrogen-vacancy (NV) color center in diamond is an atom-like system in the solid-state which specific spin properties can be efficiently used as a sensitive magnetic sensor. A…
Quantitative stray field imaging of a magnetic vortex core
J. -P. Tetienne, T. Hingant, L. Rondin +4
Thin-film ferromagnetic disks present a vortex spin structure whose dynamics, added to the small size (~10 nm) of their core, earned them intensive study. Here we use a scanning ni…
Measuring the magnetic moment density in patterned ultrathin ferromagnets with submicron resolution
T. Hingant, J. -P. Tetienne, L. J. MartÃnez +4
We present a new approach to infer the surface density of magnetic moments in ultrathin ferromagnetic films with perpendicular anisotropy. It relies on quantitative stray fie…
Broad diversity of near-infrared single-photon emitters in silicon
A. Durand, Y. Baron, W. Redjem +11
We report the detection of individual emitters in silicon belonging to seven different families of optically-active point defects. These fluorescent centers are created by carbon i…
Single photon wavefront-splitting interference: An illustration of the light quantum in action
V. Jacques, E. Wu, T. Toury +4
We present a new realization of the textbook experiment consisting in single-photon interference based on the pulsed, optically excited photoluminescence of a single colour centre…
Strong Coupling of a Spin Ensemble to a Superconducting Resonator
Y. Kubo, F. R. Ong, P. Bertet +11
We report the realization of a quantum circuit in which an ensemble of electronic spins is coupled to a frequency tunable superconducting resonator. The spins are Nitrogen-Vacancy…
Perfect preferential orientation of nitrogen-vacancy defects in a synthetic diamond sample
M. Lesik, J. -P. Tetienne, A. Tallaire +5
We show that the orientation of nitrogen-vacancy (NV) defects in diamond can be efficiently controlled through chemical vapor deposition (CVD) growth on a (111)-oriented diamond su…
Optical properties of an ensemble of G-centers in silicon
C. Beaufils, W. Redjem, E. Rousseau +10
We addressed the carrier dynamics in so-called G-centers in silicon (consisting of substitutional-interstitial carbon pairs interacting with interstitial silicons) obtained via ion…
Coherent scattering from silicon mocrystal surface
F. Livet, G. Beutier, M. de Boissieu +4
Using coherent x-ray scattering, we evidenced atomic step roughness at the [111] vicinal surface of a silicon monocrystal of 0.05 degree miscut. Close to the (1/2 1/2 1/2) anti-Bra…
Spin-dependent photodynamics of boron-vacancy centers in hexagonal boron nitride
T. Clua-Provost, Z. Mu, A. Durand +13
The negatively-charged boron vacancy (V) center in hexagonal boron nitride (hBN) is currently garnering considerable attention for the design of two-dimensional (2D) q…
Single artificial atoms in silicon emitting at telecom wavelengths
W. Redjem, A. Durand, T. Herzig +15
Given its unrivaled potential of integration and scalability, silicon is likely to become a key platform for large-scale quantum technologies. Individual electron-encoded artificia…
Optimizing synthetic diamond samples for quantum sensing technologies by tuning the growth temperature
S. Chouaieb, L. J. MartÃnez, W. Akhtar +6
Control of the crystalline orientation of nitrogen-vacancy (NV) defects in diamond is here demonstrated by tuning the temperature of chemical vapor deposition (CVD) growth on a (11…
Single-photon emission in the near infrared from diamond colour centre
E Wu, V. Jacques, F. Treussart +3
Optically active colour centres based on Nickel-Nitrogen impurities are observed in natural diamond under continuous-wave excitation. The spectral analysis shows that the single em…
Temperature dependent creation of nitrogen-vacancy centers in CVD diamond layers
A. Tallaire, M. Lesik, V. Jacques +8
In this work, we explore the ability of plasma assisted chemical vapor deposition (PACVD) operating under high power densities to produce thin high-quality diamond layers with a co…
Isotope substitution and polytype control for point defects identification: the case of the ultraviolet color center in hexagonal boron nitride
J. Plo, A. Pershin, S. Li +18
Defects in crystals can have a transformative effect on the properties and functionalities of solid-state systems. Dopants in semiconductors are core components in electronic and o…
Room temperature skyrmions at zero field in exchange-biased ultrathin films
K. Gaurav Rana, A. Finco, F. Fabre +12
We demonstrate that magnetic skyrmions with a mean diameter around 60 nm can be stabilized at room temperature and zero external magnetic field in an exchange-biased Pt/Co/NiFe/IrM…
Non-linear spectroscopy of rubidium: An undergraduate experiment
V. Jacques, B. Hingant, A. Allafort +2
In this paper, we describe two complementary non-linear spectroscopy methods which both allow to achieve Doppler-free spectra of atomic gases. First, saturated absorption spectrosc…