A5031813406- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- High-pressure geophysics and materials
- Force Microscopy Techniques and Applications
- Quantum optics and atomic interactions
- Atomic and Subatomic Physics Research
- Luminescence Properties of Advanced Materials
- Nanoplatforms for cancer theranostics
- Nonlinear Optical Materials Studies
- Ferroelectric and Piezoelectric Materials
- Metal and Thin Film Mechanics
- Near-Field Optical Microscopy
- Ion-surface interactions and analysis
- Advanced Materials Characterization Techniques
- Photorefractive and Nonlinear Optics
- Luminescence and Fluorescent Materials
- Spectroscopy and Quantum Chemical Studies
- Acoustic Wave Resonator Technologies
- Laser-Matter Interactions and Applications
- Quantum and electron transport phenomena
- Advanced Fluorescence Microscopy Techniques
Thales (France)
2016-2024
Laboratoire Albert Fert
2018
Centre National de la Recherche Scientifique
2013-2016
École Normale Supérieure Paris-Saclay
2014-2016
Université Paris-Saclay
2016
Laboratoire Aimé Cotton
2016
Université Paris-Sud
2016
École Polytechnique
2013-2015
Laboratoire de physique de la matière condensée
2014
Laboratoire de Photonique Quantique et Moléculaire
2014
We report an experimental study of the longitudinal relaxation time (${T}_{1}$) electron spin associated with single nitrogen-vacancy (NV) defects hosted in nanodiamonds (NDs). first show that ${T}_{1}$ decreases over three orders magnitude when ND size is reduced from 100 to 10 nm owing interaction NV a bath paramagnetic centers lying on surface. next tune magnetic environment by decorating surface Gd${}^{3+}$ ions and observe efficient quenching, which demonstrates noise sensing spin....
We analyze the impact of electric field and magnetic fluctuations in decoherence electronic spin associated with a single nitrogen-vacancy (NV) defect diamond. To this end, we tune amplitude order to engineer eigenstates protected either against noise or noise. The competition between these sources is analyzed quantitatively by changing their relative strength through modifications host diamond material. This study provides significant insights into NV spin, which valuable for quantum...
Abstract The rapid development of radio-frequency (RF) technologies requires tools which can efficiently monitor the electromagnetic landscape. Broadband real-time RF spectral analyzers need to operate at room temperature, with low power consumption and have a compact design for on-board device integration. Here we describe Quantum Diamond Signal Analyzer (Q-DiSA) detects signals over tunable frequency range 25 GHz resolution down 1 MHz, millisecond temporal large dynamic (40 dB). This...
We report an efficient colloidal synthesis of KTiOPO4 (KTP) nanocrystals with excellent crystallinity and the direct observation optical second-harmonic generation (SHG) from discrete KTP in neurons cultured mammalian brain cortex. Direct internalization monitoring these nanoparticles was successfully achieved without limitations cytotoxicity, bleaching blinking emission.
Abstract In this paper we study the dynamics of an ensemble nitrogen-vacancy centers in diamond when its photoluminescence is detected by means a widefield imaging system. We develop seven-level model and use it to simulate detection Rabi oscillations. The simulation results are compared with experimental measurements showing good agreement. particular, explain asymmetric shape oscillations due incomplete repolarization center during pulse sequence implemented for
High density Nitrogen-Vacancy (NV) centre ensembles incorporated in plasma assisted chemical vapour deposition (CVD) diamond are crucial to the development of more efficient sensing devices that use properties luminescent defects. Achieving high NV doping with N2 as dopant gas source during growth is, however, plagued by formation macroscopic and point defects quench luminescence. Moreover, such NVs found exhibit poor photostability under laser powers. Although this effect can be harnessed...
Dual light emitting KTP@LaPO<sub>4</sub>:Eu nanoparticles have been synthesized and characterized.
Abstract The negatively charged nitrogen-vacancy center (NV) presents remarkable spin-dependent optical properties that make it an interesting tool for magnetic field sensing. In this paper we exploit the polarization of NV absorption and emission processes to improve sensitivity ensemble centers. By simply equipping experimental set-up a half-wave plate in excitation path polarizer detection demonstrate improvement larger than factor two on sensitivity.
Nitrogen‐vacancy (NV) colour centre in diamond is a very promising tool for sensing applications from magnetometry to thermometry. In this paper, we demonstrate compact and convenient device magnetic‐field where commercial single‐mode photonic crystal fibre directly coupled high quality sample synthesised by means of chemical vapour deposition process containing residual nitrogen impurity rate smaller than 1 part per million. We managed excite detect efficiently the photoluminescence an...
The spin readout of an ensemble nitrogen-vacancy (NV) centers in diamond can be realized by a photoconductive detection that is complementary method to the optical NV electron magnetic resonance. Here, we implement through graphitic planar electrodes collect photocurrent. Graphitic are patterned using xenon focused-ion beam on optical-grade quality crystal containing nitrogen concentration ∼1 ppm and few parts per billion. Resistance current–voltage characteristics NV-doped junction...
Detection and spectroscopy of microwave (> GHz) signals is pivotal importance for key areas modern technology, including wireless communication, radar, navigation medical imaging. Here we demonstrate a real-time spectrum analysis using nitrogen-vacancy (NV) centers in diamond. By monitoring electron spin dependent fluorescence NV under continuous illumination, managed to detect signal with 1 MHz resolution spatial resolution, upper frequency limit 18 GHz ms temporal resolution.
We present a nanoscale electro-optic imaging method allowing access to the phase response, which is not amenable classical second-harmonic generation microscopy. This approach used infer vectorial orientation of single domain ferroelectric nanocrystals, based on polarization-resolved Pockels The response KTP nanoparticles yields full in laboratory frame randomly dispersed nanoparticles, together with their electric polarization dipole. complete vector determination dipole prerequisite...
Received 13 June 2019DOI:https://doi.org/10.1103/PhysRevB.99.249903©2019 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasFluctuations & noiseOpen quantum systems decoherenceQuantum information with solid state qubitsPhysical SystemsNitrogen vacancy centers in diamondCondensed Matter, Materials Applied Physics
The negatively charged nitrogen-vacancy center (NV) presents remarkable spin-dependent optical properties that make it an interesting tool for magnetic field sensing. In this paper we exploit the polarization of NV absorption and emission processes to improve sensitivity ensemble centers. By simply equipping experimental set-up a half-wave plate in excitation path polarizer detection demonstrate improvement larger than factor two on sensitivity.
In this paper we study the dynamics of an ensemble nitrogen-vacancy centers in diamond when its photoluminescence is detected by means a widefield imaging system. We develop seven-level model and use it to simulate detection Rabi oscillations. The simulation results are compared with experimental measurements showing good agreement. particular, explain asymmetric shape oscillations due incomplete repolarization center during pulse sequence implemented for
The spin readout of an ensemble nitrogen-vacancy (NV) centers in diamond can be realized by a photoconductive detection that is complementary method to the optical NV electron magnetic resonance. Here, we implement through graphitic planar electrodes collect photocurrent. Graphitic are patterned using xenon Focused-Ion Beam on Optical-Grade quality crystal containing nitrogen concentration ~1 ppm and few ppb. Resistance current-voltage characteristics NV-doped junction investigated tuning...