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| Open AccessCoherent dynamics of multi-spin V\({}_{{{{{{{{\rm{B}}}}}}}}}^{-}\) center in hexagonal boron nitride
Understanding the coherent dynamics of electron and nucleus spins in hBN is crucial for their applications as qubits and quantum sensors. Here the authors report room-temperature coherent manipulation of the negatively charged boron vacancy spins in hBN and study their dynamics under weak and strong magnetic fields.
- Wei Liu
- , Viktor Ivády
- & Guang-Can Guo
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| Open AccessDiamond mirrors for high-power continuous-wave lasers
Mirrors that demonstrate 98% reflectivity and withstand 10 kilowatts of focused continuous-wave laser light are created by nanoscale fabrication of single-crystal diamond. The work finds applications in medicine, defence, industry, and communications.
- Haig A. Atikian
- , Neil Sinclair
- & Marko Lončar
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| Open AccessNV– diamond laser
Diamond is a promising host material for color-center photon source. Here the authors provide the experimental evidence of lasing in (NV−) centers in diamond. Through a rational fine-tuning of the pump condition they decrease the photoionization, ultimately increasing the laser efficiency.
- Alexander Savvin
- , Alexander Dormidonov
- & Viktor Vins
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| Open AccessRoom-temperature control and electrical readout of individual nitrogen-vacancy nuclear spins
Nuclear spins in diamond are promising for applications in quantum technologies due to their long coherence times. Here, the authors demonstrate a scalable electrical readout of individual intrinsic 14N nuclear spins in diamond, mediated by hyperfine coupling to electron spin of the NV center, as a step towards room-temperature nanoscale diamond quantum devices.
- Michal Gulka
- , Daniel Wirtitsch
- & Milos Nesladek
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| Open AccessProcessing light with an optically tunable mechanical memory
The use of cavity optomechanics for optical information processing is hindered by mechanical dissipation and the difficulties in stored signal control. Here, the authors improve performances on both fronts using time-varying parametric feedback through an additional optical field in a multi-mode cavity.
- David P. Lake
- , Matthew Mitchell
- & Paul E. Barclay
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| Open AccessCoherent acoustic control of a single silicon vacancy spin in diamond
Qubits in solid state systems like point defects in diamond can be influenced by local strain. Here the authors use surface acoustic waves to coherently control silicon vacancies in diamond, which have the potential to reach the strong coupling regime necessary for many applications.
- Smarak Maity
- , Linbo Shao
- & Marko Lončar
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| Open AccessCoulomb-driven single defect engineering for scalable qubits and spin sensors in diamond
Nitrogen vacancy centres occur naturally in diamond and have potential uses in quantum computing but many applications require scalable, accurate fabrication methods. Here the authors demonstrate that tuning the doping modifies the dynamics of centre formation, increasing yields and coherence times.
- Tobias Lühmann
- , Roger John
- & Sébastien Pezzagna
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| Open AccessNanoscale electrical conductivity imaging using a nitrogen-vacancy center in diamond
Nitrogen-vacancy centres in diamond are highly sensitive to their environment, making them well suited to quantum sensing applications. Here, the authors demonstrate the capabilities of a scanning nitrogen-vacancy sensor for nanoscale measurements of electrical conductivity.
- Amila Ariyaratne
- , Dolev Bluvstein
- & Ania C. Bleszynski Jayich
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| Open AccessControlling the coherence of a diamond spin qubit through its strain environment
Silicon-vacancy centres in diamond are promising candidates as emitters in photonic quantum networks, but their coherence is degraded by large electron-phonon interactions. Sohn et al. demonstrate the use of strain to tune a silicon vacancy’s electronic structure and suppress phonon-mediated decoherence.
- Young-Ik Sohn
- , Srujan Meesala
- & Marko Lončar
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| Open AccessNanoscale zero-field electron spin resonance spectroscopy
Demonstrations of sensing devices using nitrogen vacancy centres have shown significantly improved sensitivity compared to traditional methods. Here the authors demonstrate an approach for performing nanoscale electron spin resonance without magnetic fields in order to achieve better spectral resolution.
- Fei Kong
- , Pengju Zhao
- & Jiangfeng Du
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| Open AccessQuantum probe hyperpolarisation of molecular nuclear spins
Molecules with ‘hyperpolarised’ nuclear spins can be used to improve MRI performance but require an efficient polarisation method. Broadway et al. demonstrate a quantum control protocol using a nitrogen vacancy centre inside a diamond to hyperpolarise protons within molecules deposited on the surface.
- David A. Broadway
- , Jean-Philippe Tetienne
- & Lloyd C. L. Hollenberg
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| Open AccessElectron paramagnetic resonance microscopy using spins in diamond under ambient conditions
Electron paramagnetic resonance spectroscopy has important scientific and medical uses but improving the resolution of conventional methods requires cryogenic, vacuum environments. Simpson et al. show nitrogen vacancy centres can be used for sub-micronmetre imaging with improved sensitivity in ambient conditions.
- David A. Simpson
- , Robert G. Ryan
- & Lloyd C. L. Hollenberg
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| Open AccessSolution nuclear magnetic resonance spectroscopy on a nanostructured diamond chip
Nitrogen vacancy (NV) centres in diamond can be used for NMR spectroscopy, but increased sensitivity is needed to avoid long measurement times. Kehayias et al. present a nanostructured diamond grating with a high density of NV centres, enabling NMR spectroscopy of picoliter-volume solutions.
- P. Kehayias
- , A. Jarmola
- & V. M. Acosta
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| Open AccessCoherent control of the silicon-vacancy spin in diamond
Silicon vacancy centres in diamond have favourable optical properties for use in quantum information processing. Here, the authors demonstrate coherent control of silicon vacancy spins, a prerequisite for the implementation of quantum computing operations.
- Benjamin Pingault
- , David-Dominik Jarausch
- & Mete Atatüre
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| Open AccessScalable focused ion beam creation of nearly lifetime-limited single quantum emitters in diamond nanostructures
Interfacing spin quantum memories with photons requires the controlled creation of defect centre—nanocavity systems. Here the authors demonstrate direct, maskless creation of single silicon vacancy centres in diamond nanostructures, and report linewidths comparable to naturally occurring centres
- Tim Schröder
- , Matthew E. Trusheim
- & Dirk Englund
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| Open AccessCoherent control of a strongly driven silicon vacancy optical transition in diamond
Silicon vacancy centres in diamond have been identified as potential highly efficient solid-state qubits for on-chip integration. Here, Zhouet al. demonstrate coherent control of silicon vacancy centres in nanodiamonds and observe Autler-Townes splitting, Mollow triplet and Rabi oscillations.
- Yu Zhou
- , Abdullah Rasmita
- & Wei-bo Gao
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| Open AccessCooling a mechanical resonator with nitrogen-vacancy centres using a room temperature excited state spin–strain interaction
An efficient cooling mechanism for nanoscale mechanical resonators would help improve their properties for use in sensing applications. Here, the authors demonstrate a strong interaction between NV centres and a resonator and show how it could be harnessed to achieve a large cooling rate.
- E. R. MacQuarrie
- , M. Otten
- & G. D. Fuchs
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| Open AccessStimulated emission from nitrogen-vacancy centres in diamond
Here Jeskeet al. show both theoretical and experimental evidence for stimulated emission from negatively charged nitrogen vacancy centres using light in the phonon sidebands around 700 nm, demonstrating its suitability as a laser medium.
- Jan Jeske
- , Desmond W. M. Lau
- & Andrew D. Greentree
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| Open AccessJahn-Teller-induced femtosecond electronic depolarization dynamics of the nitrogen-vacancy defect in diamond
Understanding ultrafast dynamics of excited states of nitrogen-vacancy helps its manipulation for technological applications. Here the authors use polarization anisotropy spectroscopy and molecular dynamics to investigate sub-picosecond dephasing dynamics, identifying the origin of orbital averaging effects.
- Ronald Ulbricht
- , Shuo Dong
- & Zhi-Heng Loh
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| Open AccessOptical patterning of trapped charge in nitrogen-doped diamond
Manipulating nitrogen vacancies in nitrogen-doped diamond is important for quantum information processing. Here the authors use a two-colour excitation to redistribute the localized trapping charges in type-1b diamonds.
- Harishankar Jayakumar
- , Jacob Henshaw
- & Carlos A. Meriles
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| Open AccessQuantum teleportation from light beams to vibrational states of a macroscopic diamond
Quantum teleportation has found important applications in quantum technologies, but pushing it to macroscopic objects is challenging because of the fragility of quantum states. Here, the authors demonstrate teleportation of states from light beams to the vibrational states of a macroscopic diamond sample.
- P.-Y. Hou
- , Y.-Y. Huang
- & L.-M. Duan
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| Open AccessPhotoelectric detection of electron spin resonance of nitrogen-vacancy centres in diamond
Nitrogen-vacancy colour centre defects in diamond are one possible host for qubits, but such an application requires a method for reading out the colour centre spin state. Here, the authors demonstrate a photoelectric readout technique of the magnetic resonances of these colour centres.
- E. Bourgeois
- , A. Jarmola
- & M. Nesladek
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Optically detected cross-relaxation spectroscopy of electron spins in diamond
In nanoscale magnetic resonance, the coupling with negatively charged nitrogen-vacancy centres in diamond—used as optical transducers—broadens the spectrum of the spin to detect. Wang et al.present a detection technique that resolves the spin spectra through optically detected cross-relaxation.
- Hai-Jing Wang
- , Chang S. Shin
- & Vikram S. Bajaj
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| Open AccessObservation of dark states in a superconductor diamond quantum hybrid system
Recently, a sharp resonance was observed in the spectrum of a flux-qubit nitrogen-vacancy-centre hybrid quantum system that is much narrower than that of either the flux qubit or the spin ensemble. Zhu et al.investigate this resonance and find evidence of a coherently driven collective dark state.
- Xiaobo Zhu
- , Yuichiro Matsuzaki
- & Shiro Saito
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Synthesis of luminescent europium defects in diamond
Impurities and defects embedded in diamond are a promising platform for spintronics and photonics. Here, Magyar and colleagues incorporate europium defects in diamond, whose optical properties promise their use in quantum information applications.
- Andrew Magyar
- , Wenhao Hu
- & Igor Aharonovich
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Two-photon polarization-selective etching of emergent nano-structures on diamond surfaces
Using light to manipulate matter on scales smaller than its wavelength presents a major challenge. Here, the authors show that two-photon surface excitation of diamond surfaces etches a variety of nano-scale patterns, comprising evidence for carbon ejection via a highly localized photon interaction with the crystal bonds.
- A. Lehmann
- , C. Bradac
- & R. P. Mildren
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Optical signatures of silicon-vacancy spins in diamond
Diamond colour centres are of interest for solid-state quantum technologies but obtaining an efficient spin-photon interface remains challenging. Here, the authors use resonant excitation under magnetic fields to optically access the electronic spin sublevels of silicon-vacancy centres in diamond.
- Tina Müller
- , Christian Hepp
- & Mete Atatüre
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Time-resolved magnetic sensing with electronic spins in diamond
Nitrogen-vacancy centres in diamonds are promising sensors for magnetic and electric fields, but existing acquisition methods are not suitable for measuring time-varying fields. Here, the authors introduce an acquisition method that exploits Walsh control sequences to efficiently measure this fields.
- A. Cooper
- , E. Magesan
- & P. Cappellaro
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Sensitive magnetic control of ensemble nuclear spin hyperpolarization in diamond
The transfer of spin polarization from electrons to nuclei is important for nuclear spin-based techniques such as nuclear magnetic resonance. Here Wang and colleagues achieve sensitive magnetic control of the hyperpolarization of nuclei near optically polarized nitrogen-vacancy centres in diamond.
- Hai-Jing Wang
- , Chang S. Shin
- & Vikram S. Bajaj
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Diamond-integrated optomechanical circuits
Diamond is of interest for optical and electronic applications owing to its unique mechanical and optical properties. Here, Rath et al. demonstrate the use of small nanometre-sized beams etched from diamond thin films for integrated photonic circuits.
- Patrik Rath
- , Svetlana Khasminskaya
- & Wolfram H.P. Pernice