ORCID Profile
0000-0001-5796-2508
Current Organisation
RMIT University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Condensed Matter Physics | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Condensed Matter Characterisation Technique Development | Quantum Physics | Quantum Physics not elsewhere classified | Photonics and Electro-Optical Engineering (excl. Communications) | Elemental Semiconductors | Photodetectors, Optical Sensors and Solar Cells | Quantum Optics | Surfaces and Structural Properties of Condensed Matter | Quantum Information, Computation and Communication | Condensed Matter Imaging | Biological Physics
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Physical Sciences | Expanding Knowledge in Technology | Expanding Knowledge in Engineering | Scientific Instruments | Expanding Knowledge in the Biological Sciences |
Related Links
Publications
Magneto-optical imaging of thin magnetic films using spins in diamond
Publisher: Springer Science and Business Media LLC
Date: 14-03-2016
DOI: 10.1038/SREP22797
Abstract: Imaging the fields of magnetic materials provides crucial insight into the physical and chemical processes surrounding magnetism and has been a key ingredient in the spectacular development of magnetic data storage. Existing approaches using the magneto-optic Kerr effect, x-ray and electron microscopy have limitations that constrain further development and there is increasing demand for imaging and characterisation of magnetic phenomena in real time with high spatial resolution. Here we show how the magneto-optical response of an array of negatively-charged nitrogen-vacancy spins in diamond can be used to image and map the sub-micron stray magnetic field patterns from thin ferromagnetic films. Using optically detected magnetic resonance, we demonstrate wide-field magnetic imaging over 100 × 100 μm 2 with sub-micron spatial resolution at video frame rates, under ambient conditions. We demonstrate an all-optical spin relaxation contrast imaging approach which can image magnetic structures in the absence of an applied microwave field. Straightforward extensions promise imaging with sub-μT sensitivity and sub-optical spatial and millisecond temporal resolution. This work establishes practical diamond-based wide-field microscopy for rapid high-sensitivity characterisation and imaging of magnetic s les, with the capability for investigating magnetic phenomena such as domain wall and skyrmion dynamics and the spin Hall effect in metals.
Quantum Cascade Lasers with Integrated Multi-Beam Plasmonic Collimators
Publisher: OSA
Date: 2011
Apparent delocalization of the current density in metallic wires observed with diamond nitrogen-vacancy magnetometry
Publisher: American Physical Society (APS)
Date: 29-01-2019
Intrinsic fluorescence from cellulose nanofibers and nanoparticles at cell friendly wavelengths
Publisher: AIP Publishing
Date: 02-2019
DOI: 10.1063/1.5079883
Imaging Current Paths in Silicon Photovoltaic Devices with a Quantum Diamond Microscope
Publisher: American Physical Society (APS)
Date: 18-07-2022
Scanning Nanospin Ensemble Microscope for Nanoscale Magnetic and Thermal Imaging
Publisher: American Chemical Society (ACS)
Date: 04-01-2016
DOI: 10.1021/ACS.NANOLETT.5B03877
Abstract: Quantum sensors based on solid-state spins provide tremendous opportunities in a wide range of fields from basic physics and chemistry to biomedical imaging. However, integrating them into a scanning probe microscope to enable practical, nanoscale quantum imaging is a highly challenging task. Recently, the use of single spins in diamond in conjunction with atomic force microscopy techniques has allowed significant progress toward this goal, but generalization of this approach has so far been impeded by long acquisition times or by the absence of simultaneous topographic information. Here, we report on a scanning quantum probe microscope which solves both issues by employing a nanospin ensemble hosted in a nanodiamond. This approach provides up to an order of magnitude gain in acquisition time while preserving sub-100 nm spatial resolution both for the quantum sensor and topographic images. We demonstrate two applications of this microscope. We first image nanoscale clusters of maghemite particles through both spin resonance spectroscopy and spin relaxometry, under ambient conditions. Our images reveal fast magnetic field fluctuations in addition to a static component, indicating the presence of both superparamagnetic and ferromagnetic particles. We next demonstrate a new imaging modality where the nanospin ensemble is used as a thermometer. We use this technique to map the photoinduced heating generated by laser irradiation of a single gold nanoparticle in a fluid environment. This work paves the way toward new applications of quantum probe microscopy such as thermal/magnetic imaging of operating microelectronic devices and magnetic detection of ion channels in cell membranes.
Mid-infrared direct coupling of surface-plasmon polaritons
Publisher: OSA
Date: 2010
Polarization Transfer to External Nuclear Spins Using Ensembles of Nitrogen-Vacancy Centers
Publisher: American Physical Society (APS)
Date: 24-05-2021
Stray-field imaging of magnetic vortices with a single diamond spin
Publisher: Springer Science and Business Media LLC
Date: 31-07-2013
DOI: 10.1038/NCOMMS3279
Abstract: Despite decades of advances in magnetic imaging, obtaining direct, quantitative information with nanometre scale spatial resolution remains an outstanding challenge. Recently, a technique has emerged that employs a single nitrogen-vacancy defect in diamond as an atomic-size magnetometer, which promises significant advances. However, the effectiveness of the technique when applied to magnetic nanostructures remains to be demonstrated. Here we use a scanning nitrogen-vacancy magnetometer to image a magnetic vortex, which is one of the most iconic objects of nanomagnetism, owing to the small size (~10 nm) of the vortex core. We report three-dimensional, vectorial and quantitative measurements of the stray magnetic field emitted by a vortex in a ferromagnetic square dot, including the detection of the vortex core. We find excellent agreement with micromagnetic simulations, both for regular vortex structures and for higher-order magnetization states. These experiments establish scanning nitrogen-vacancy magnetometry as a practical and unique tool for fundamental studies in nanomagnetism.
Direct measurement of interfacial Dzyaloshinskii-Moriya interaction in X vertical bar CoFeB vertical bar MgO heterostructures with a scanning NV magnetometer (X=Ta, TaN, and W)
Publisher: American Physical Society (APS)
Date: 11-08-2016
Quantum imaging of current flow in graphene
Publisher: American Association for the Advancement of Science (AAAS)
Date: 07-04-2017
Abstract: We demonstrate diamond-based quantum imaging of the current flow in graphene structures with submicrometer resolution.
Anticrossing Spin Dynamics of Diamond Nitrogen-Vacancy Centers and All-Optical Low-Frequency Magnetometry
Publisher: American Physical Society (APS)
Date: 02-12-2016
Microwave-free nuclear magnetic resonance at molecular scales
Publisher: Springer Science and Business Media LLC
Date: 03-07-2017
DOI: 10.1038/NCOMMS15950
Abstract: The implementation of nuclear magnetic resonance (NMR) at the nanoscale is a major challenge, as the resolution of conventional methods is limited to mesoscopic scales. Approaches based on quantum spin probes, such as the nitrogen-vacancy (NV) centre in diamond, have achieved nano-NMR under ambient conditions. However, the measurement protocols require application of complex microwave pulse sequences of high precision and relatively high power, placing limitations on the design and scalability of these techniques. Here we demonstrate NMR on a nanoscale organic environment of proton spins using the NV centre while eliminating the need for microwave manipulation of either the NV or the environmental spin states. We also show that the sensitivity of our significantly simplified approach matches that of existing techniques using the NV centre. Removing the requirement for coherent manipulation while maintaining measurement sensitivity represents a significant step towards the development of robust, non-invasive nanoscale NMR probes.
Injection of midinfrared surface plasmon polaritons with an integrated device
Publisher: AIP Publishing
Date: 22-11-2010
DOI: 10.1063/1.3519985
Abstract: We demonstrate a compact, integrated device in which surface plasmon polaritons (SPPs) are injected into a passive metal waveguide. We directly excite a SPP mode at a metal-air interface using a room-temperature midinfrared quantum cascade laser which is integrated onto the microchip. The SPP generation relies on end-fire coupling and is demonstrated via both far-field and near-field imaging techniques in the midinfrared. On one hand, a metallic diffraction grating is used to scatter in the far-field a portion of the propagating SPPs, thus allowing their detection with a microbolometer camera. On the other hand, direct images of the generated SPPs in the near-field were collected with a scanning optical microscope.
Investigation of charge carrier trapping in H-terminated diamond devices
Publisher: AIP Publishing
Date: 05-10-2020
DOI: 10.1063/5.0026104
Abstract: Surfaces and interfaces can dominate charge carrier transport dynamics in electronic devices, impeding realization of a material's full potential. Here, we investigate transport in a two-terminal diamond device comprising a conductive channel defined by a hydrogen-terminated diamond surface, bridging two TiC contacts. The surface charge distribution was imaged by monitoring the photoluminescence of nitrogen vacancy centers incorporated below the active device layer. A strong charge accumulation near the TiC contact/H-terminated channel interface is observed and is discussed in terms of deviation from Ohmic behavior evident in the DC electrical measurements. Small voltage steps applied to the device result in current transients due to carrier trapping at the contact/diamond interface. This gives rise to dynamic negative capacitance at low AC frequencies and is discussed in detail.
ChemInform Abstract: Magnetometry with Nitrogen‐Vacancy Defects in Diamond
Publisher: Wiley
Date: 02-10-2014
Design of an integrated coupler for the electrical generation of surface plasmon polaritons
Publisher: The Optical Society
Date: 31-08-2011
DOI: 10.1364/OE.19.018155
Evidence for Primal sp2 Defects at the Diamond Surface: Candidates for Electron Trapping and Noise Sources
Publisher: Wiley
Date: 03-12-2018
Quantum probe hyperpolarisation of molecular nuclear spins
Publisher: Springer Science and Business Media LLC
Date: 28-03-2018
DOI: 10.1038/S41467-018-03578-1
Abstract: Hyperpolarisation of nuclear spins is important in overcoming sensitivity and resolution limitations of magnetic resonance imaging and nuclear magnetic resonance spectroscopy. Current hyperpolarisation techniques require high magnetic fields, low temperatures, or catalysts. Alternatively, the emergence of room temperature spin qubits has opened new pathways to achieve direct nuclear spin hyperpolarisation. Employing a microwave-free cross-relaxation induced polarisation protocol applied to a nitrogen vacancy qubit, we demonstrate quantum probe hyperpolarisation of external molecular nuclear spins to ~50% under ambient conditions, showing a single qubit increasing the polarisation of ~10 6 nuclear spins by six orders of magnitude over the thermal background. Results are verified against a detailed theoretical treatment, which also describes how the system can be scaled up to a universal quantum hyperpolarisation platform for macroscopic s les. Our results demonstrate the prospects for this approach to nuclear spin hyperpolarisation for molecular imaging and spectroscopy and its potential to extend beyond into other scientific areas.
Coupled Nanocavity-Grating Resonances: Large Plasmonic Enhancement of Nonlinear Optical Phenomena
Publisher: OSA
Date: 2011
Prospects for nuclear spin hyperpolarization of molecular samples using nitrogen-vacancy centers in diamond
Publisher: American Physical Society (APS)
Date: 21-01-2021
Aberration control in quantitative widefield quantum microscopy
Publisher: American Vacuum Society
Date: 09-2022
DOI: 10.1116/5.0114436
Abstract: Widefield quantum microscopy based on nitrogen-vacancy (NV) centers in diamond has emerged as a powerful technique for quantitative mapping of magnetic fields with a sub-micrometer resolution. However, the accuracy of the technique has not been characterized in detail so far. Here, we show that optical aberrations in the imaging system may cause large systematic errors in the measured quantity beyond trivial blurring. We introduce a simple theoretical framework to model these effects, which extends the concept of a point spread function to the domain of spectral imaging. Using this model, the magnetic field imaging of test magnetic s les is simulated under various scenarios, and the resulting errors are quantified. We then apply the model to previously published data, show that apparent magnetic anomalies can be explained by the presence of optical aberrations, and demonstrate a post-processing technique to retrieve the source quantity with improved accuracy. This work presents a guide to predict and mitigate aberration induced artifacts in quantitative NV-based widefield imaging and in spectral imaging more generally.
Improved Current Density and Magnetization Reconstruction Through Vector Magnetic Field Measurements
Publisher: American Physical Society (APS)
Date: 26-08-2020
Laser Modulation of Superconductivity in a Cryogenic Wide-field Nitrogen-Vacancy Microscope
Publisher: American Chemical Society (ACS)
Date: 04-02-2020
Nonvanishing effect of detuning errors in dynamical-decoupling-based quantum sensing experiments
Publisher: American Physical Society (APS)
Date: 09-01-2019
Manipulating the Quantum Coherence of Optically Trapped Nanodiamonds
Publisher: American Chemical Society (ACS)
Date: 10-2018
Detection of Paramagnetic Spins with an Ultrathin van der Waals Quantum Sensor
Publisher: American Chemical Society (ACS)
Date: 05-07-2023
Molding Optical Wavefronts Using Phase Discontinuities
Publisher: OSA
Date: 2011
Imaging current control of magnetization in Fe3GeTe2 with a widefield nitrogen-vacancy microscope
Publisher: IOP Publishing
Date: 28-12-2022
Abstract: Van der Waals (vdW) magnets are appealing candidates for realising spintronic devices that exploit current control of magnetization (e.g. switching or domain wall motion), but so far experimental demonstrations have been sparse, in part because of challenges associated with imaging the magnetization in these systems. Widefield nitrogen-vacancy (NV) microscopy allows rapid, quantitative magnetic imaging across entire vdW flakes, ideal for capturing changes in the micromagnetic structure due to an electric current. Here we use a widefield NV microscope to study the effect of current injection in thin flakes (∼10 nm) of the vdW ferromagnet Fe 3 GeTe 2 (FGT). We first observe current-reduced coercivity on an in idual domain level, where current injection in FGT causes substantial reduction in the magnetic field required to locally reverse the magnetisation. We then explore the possibility of current-induced domain-wall motion, and provide preliminary evidence for such a motion under relatively low current densities, suggesting the existence of strong current-induced torques in our devices. Our results illustrate the applicability of widefield NV microscopy to imaging spintronic phenomena in vdW magnets, highlight the possibility of efficient magnetization control by direct current injection without assistance from an adjacent conductor, and motivate further investigations of the effect of currents in FGT and other vdW magnets.
Semiconductor Surface Plasmon Sources
Publisher: American Physical Society (APS)
Date: 04-06-2010
Rapid, High‐Resolution Magnetic Microscopy of Single Magnetic Microbeads
Publisher: Wiley
Date: 26-03-2019
Abstract: Magnetic microparticles or "beads" are used in a variety of research applications from cell sorting through to optical force traction microscopy. The magnetic properties of such particles can be tailored for specific applications with the uniformity of in idual beads critical to their function. However, the majority of magnetic characterization techniques quantify the magnetic properties from large bead ensembles. Developing new magnetic imaging techniques to evaluate and visualize the magnetic fields from single beads will allow detailed insight into the magnetic uniformity, anisotropy, and alignment of magnetic domains. Here, diamond-based magnetic microscopy is applied to image and characterize in idual magnetic beads with varying magnetic and structural properties: ferromagnetic and superparamagnetic aramagnetic, shell (coated with magnetic material), and solid (magnetic material dispersed in matrix). The single-bead magnetic images identify irregularities in the magnetic profiles from in idual bead populations. Magnetic simulations account for the varying magnetic profiles and allow to infer the magnetization of in idual beads. Additionally, this work shows that the imaging technique can be adapted to achieve illumination-free tracking of magnetic beads, opening the possibility of tracking cell movements and mechanics in photosensitive contexts.
Environmentally Mediated Coherent Control of a Spin Qubit in Diamond
Publisher: American Physical Society (APS)
Date: 19-04-2017
An integrated widefield probe for practical diamond nitrogen-vacancy microscopy
Publisher: AIP Publishing
Date: 20-12-2021
DOI: 10.1063/5.0073320
Abstract: The widefield diamond nitrogen-vacancy (NV) microscope is a powerful instrument for imaging magnetic fields. However, a key limitation impeding its wider adoption is its complex operation, in part due to the difficulty of precisely interfacing the sensor and s le to achieve optimum spatial resolution. Here, we demonstrate a solution to this interfacing problem that is practical and reliably minimizes NV-s le standoff. We built a compact widefield NV microscope, which incorporates an integrated widefield diamond probe with full position and angular control, and developed a systematic alignment procedure based on optical interference fringes. Using this platform, we imaged an ultrathin (1 nm) magnetic film test s le and conducted a detailed study of the spatial resolution. We reproducibly achieved an estimated NV-s le standoff (and hence spatial resolution) of at most ∼2 μm across a ∼0.5 mm field of view. Guided by these results, we suggest future improvements for approaching the optical diffraction limit. This work is a step toward realizing a widefield NV microscope suitable for routine high-throughput mapping of magnetic fields.
Widefield quantum microscopy with nitrogen-vacancy centers in diamond: Strengths, limitations, and prospects
Publisher: AIP Publishing
Date: 19-10-2021
DOI: 10.1063/5.0066733
Abstract: A dense layer of nitrogen-vacancy (NV) centers near the surface of a diamond can be interrogated in a widefield optical microscope to produce spatially resolved maps of local quantities such as magnetic field, electric field, and lattice strain, providing potentially valuable information about a s le or device placed in proximity. Since the first experimental realization of such a widefield NV microscope in 2010, the technology has seen rapid development and demonstration of applications in various areas across condensed matter physics, geoscience, and biology. This Perspective analyzes the strengths and shortcomings of widefield NV microscopy in order to identify the most promising applications and guide future development. We begin with a brief review of quantum sensing with ensembles of NV centers and the experimental implementation of widefield NV microscopy. We then compare this technology to alternative microscopy techniques commonly employed to probe magnetic materials and charge flow distributions. Current limitations in spatial resolution, measurement accuracy, magnetic sensitivity, operating conditions, and ease of use are discussed. Finally, we identify the technological advances that solve the aforementioned limitations and argue that their implementation would result in a practical, accessible, high-throughput widefield NV microscope.
Quantitative stray field imaging of a magnetic vortex core
Publisher: American Physical Society (APS)
Date: 10-12-2013
Quantum Emitters in Hexagonal Boron Nitride
Publisher: American Chemical Society (ACS)
Date: 22-11-2022
DOI: 10.1021/ACS.NANOLETT.2C03743
Abstract: Hexagonal boron nitride (hBN) has emerged as a fascinating platform to explore quantum emitters and their applications. Beyond being a wide-bandgap material, it is also a van der Waals crystal, enabling direct exfoliation of atomically thin layers─a combination which offers unique advantages over bulk, 3D crystals. In this Mini Review we discuss the unique properties of hBN quantum emitters and highlight progress toward their future implementation in practical devices. We focus on engineering and integration of the emitters with scalable photonic resonators. We also highlight recently discovered spin defects in hBN and discuss their potential utility for quantum sensing. All in all, hBN has become a front runner in explorations of solid-state quantum science with promising future prospects.
Recent developments in the manipulation of magnetic domain walls in CoFeB–MgO wires for applications to high-density nonvolatile memories
Publisher: Elsevier
Date: 2015
Mid-infrared direct injection and sub-wavelength focusing of designer’s surface plasmons polaritons
Publisher: OSA
Date: 2011
Wide-band nanoscale magnetic resonance spectroscopy using quantum relaxation of a single spin in diamond
Publisher: American Physical Society (APS)
Date: 05-10-2016
Large Enhancement of Nonlinear Optical Phenomena by Plasmonic Nanocavity Gratings
Publisher: American Chemical Society (ACS)
Date: 03-11-2010
DOI: 10.1021/NL102747V
Abstract: Enhancing nonlinear processes at the nanoscale is a crucial step toward the development of nanophotonics and new spectroscopy techniques. Here we demonstrate a novel plasmonic structure, called plasmonic nanocavity grating, which is shown to dramatically enhance surface nonlinear optical processes. It consists of resonant cavities that are periodically arranged to combine local and grating resonances. The four-wave mixing signal generated in our gold nanocavity grating is enhanced by a factor up to ≈2000, 2 orders of magnitude higher than that previously reported.
Perfect preferential orientation of nitrogen-vacancy defects in a synthetic diamond sample
Publisher: AIP Publishing
Date: 17-03-2014
DOI: 10.1063/1.4869103
Abstract: We show that the orientation of nitrogen-vacancy (NV) defects in diamond can be efficiently controlled through chemical vapor deposition growth on a (111)-oriented diamond substrate. More precisely, we demonstrate that spontaneously generated NV defects are oriented with a ∼97% probability along the [111] axis, corresponding to the most appealing orientation among the four possible crystallographic axes. Such a nearly perfect preferential orientation is explained by analyzing the diamond growth mechanism on a (111)-oriented substrate and could be extended to other types of defects. This work is a significant step towards the design of optimized diamond s les for quantum information and sensing applications.
Magnetic-field-dependent photodynamics of single NV defects in diamond: an application to qualitative all-optical magnetic imaging
Publisher: IOP Publishing
Date: 19-10-2012
Infrared induced photo-dynamics of NV centres in optically trapped nanodiamond
Publisher: SPIE
Date: 07-09-2018
DOI: 10.1117/12.2320821
Sub-wavelength energy concentration with electrically generated mid-infrared surface plasmons
Publisher: The Optical Society
Date: 05-06-2012
DOI: 10.1364/OE.20.013738
Multi-wavelength mid-infrared plasmonic antennas with single nanoscale focal point
Publisher: The Optical Society
Date: 24-10-2011
DOI: 10.1364/OE.19.022113
Proximity-Induced Artefacts in Magnetic Imaging with Nitrogen-Vacancy Ensembles in Diamond
Publisher: MDPI AG
Date: 23-04-2018
DOI: 10.3390/S18041290
Quantum Magnetic Imaging of Iron Biomineralization in Teeth of the Chiton Acanthopleura hirtosa
Publisher: Wiley
Date: 19-01-2020
Comparison of different methods of nitrogen-vacancy layer formation in diamond for wide-field quantum microscopy
Publisher: American Physical Society (APS)
Date: 29-10-2020
The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry
Publisher: Springer Science and Business Media LLC
Date: 04-2015
DOI: 10.1038/NCOMMS7733
Abstract: The capacity to propagate magnetic domain walls with spin-polarized currents underpins several schemes for information storage and processing using spintronic devices. A key question involves the internal structure of the domain walls, which governs their response to certain current-driven torques such as the spin Hall effect. Here we show that magnetic microscopy based on a single nitrogen-vacancy defect in diamond can provide a direct determination of the internal wall structure in ultrathin ferromagnetic films under ambient conditions. We find pure Bloch walls in Ta/CoFeB(1 nm)/MgO, while left-handed Néel walls are observed in Pt/Co(0.6 nm)/AlOx. The latter indicates the presence of a sizable interfacial Dzyaloshinskii-Moriya interaction, which has strong bearing on the feasibility of exploiting novel chiral states such as skyrmions for information technologies.
Nanoscale imaging and control of domain-wall hopping with a nitrogen-vacancy center microscope
Publisher: American Association for the Advancement of Science (AAAS)
Date: 20-06-2014
Abstract: Domain walls, which separate regions of opposite magnetization in a ferromagnet, have rich dynamics that are difficult to characterize in small s les. Tetienne et al. imaged the magnetization of a thin ferromagnetic wire and observed the jumping of a domain wall between different positions along the wire. They used a scanning magnetic microscope based on a defect in diamond. The laser light needed to operate the microscope also enabled the control of the domain wall motion by causing local heating, which made the illuminated position more likely to contain a domain wall. Science , this issue p. 1366
Handheld Device for Noncontact Thermometry via Optically Detected Magnetic Resonance of Proximate Diamond Sensors
Publisher: American Physical Society (APS)
Date: 23-05-2023
Near-field microscopy study of propagation and focusing of designer's surface plasmons polaritons at mid-infrared wavelength
Publisher: IEEE
Date: 05-2011
Flat Optics: Controlling Wavefronts With Optical Antenna Metasurfaces
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2013
Magnetometry with nitrogen-vacancy defects in diamond
Publisher: IOP Publishing
Date: 05-2014
DOI: 10.1088/0034-4885/77/5/056503
Abstract: 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 weak magnetic fields. Magnetic imaging with nanometric resolution and field detection capabilities in the nanotesla range are enabled by the atomic-size and exceptionally long spin-coherence times of this naturally occurring defect. The exciting perspectives that ensue from these characteristics have triggered vivid experimental activities in the emerging field of 'NV magnetometry'. It is the purpose of this article to review the recent progress in high-sensitivity nanoscale NV magnetometry, generate an overview of the most pertinent results of the last years and highlight perspectives for future developments. We will present the physical principles that allow for magnetic field detection with NV centres and discuss first applications of NV magnetometers that have been demonstrated in the context of nano magnetism, mesoscopic physics and the life sciences.
Competition between electric field and magnetic field noise in the decoherence of a single spin in diamond
Publisher: American Physical Society (APS)
Date: 25-01-2016
A semiconductor device for surface-plasmon generation
Publisher: OSA
Date: 2010
Spin relaxometry of single nitrogen-vacancy defects in diamond nanocrystals for magnetic noise sensing
Publisher: American Physical Society (APS)
Date: 27-06-2013
Dipolar modeling and experimental demonstration of multi-beam plasmonic collimators
Publisher: IOP Publishing
Date: 27-05-2011
Untrained Physically Informed Neural Network for Image Reconstruction of Magnetic Field Sources
Publisher: American Physical Society (APS)
Date: 26-12-2022
Magnetic noise from ultrathin abrasively deposited materials on diamond
Publisher: American Physical Society (APS)
Date: 08-11-2018
Imaging Domain Reversal in an Ultrathin Van der Waals Ferromagnet
Publisher: Wiley
Date: 23-08-2020
Imaging Graphene Field-Effect Transistors on Diamond Using Nitrogen-Vacancy Microscopy
Publisher: American Physical Society (APS)
Date: 09-08-2019
Quantum microscopy with van der Waals heterostructures
Publisher: Springer Science and Business Media LLC
Date: 07-11-2023
Off-axis and multi-directional plasmonic lenses
Publisher: OSA
Date: 2011
Spin properties of dense near-surface ensembles of nitrogen-vacancy centers in diamond
Publisher: American Physical Society (APS)
Date: 02-02-2018
Temperature and angle dependent magnetic imaging of biological iron nanoparticles using quantum diamond microscopy
Publisher: AIP Publishing
Date: 16-01-2023
DOI: 10.1063/5.0114998
Abstract: Quantum diamond microscopy is an emerging versatile technique for studying the magnetic properties of materials. It has been applied extensively in condensed matter physics and materials science and has blossomed into a unique platform for the magnetic study of biological systems. To date, biological demonstrations of quantum diamond microscopy have been performed under ambient conditions. Here, we extend this magnetic microscopy platform to cryogenic temperatures to study magnetic anisotropy and the blocking temperature from an in idual iron organelle found within the inner ear of pigeons. Our work confirms that the interface between thin histological tissue sections and diamond can be maintained under cryogenic temperatures. Our magnetic images provide evidence of magnetic anisotropy from a single iron organelle with sub-cellular resolution using this correlative optical imaging method. This approach may be extended to a broad range of systems where magnetic materials play structural and functional roles in biological systems.
Nitrogen-vacancy-center imaging of bubble domains in a 6-Å film of cobalt with perpendicular magnetization
Publisher: AIP Publishing
Date: 09-01-2014
DOI: 10.1063/1.4861557
Abstract: We employ a scanning nitrogen-vacancy-center microscope to perform stray field imaging of bubble magnetic domains in a perpendicularly magnetized Pt/Co/AlOx trilayer with 6 Å of Co. The stray field created by the domain walls is quantitatively mapped with few-nanometer spatial resolution, with a probe-s le distance of about 100 nm. As an ex le of application, we show that it should be possible to determine the Bloch or Néel nature of the domain walls, which is of crucial importance to the understanding of current-controlled domain wall motion.
Microscopic Imaging of the Stress Tensor in Diamond Using in Situ Quantum Sensors
Publisher: American Chemical Society (ACS)
Date: 31-05-2019
DOI: 10.1021/ACS.NANOLETT.9B01402
Abstract: The precise measurement of mechanical stress at the nanoscale is of fundamental and technological importance. In principle, all six independent variables of the stress tensor, which describe the direction and magnitude of compression/tension and shear stress in a solid, can be exploited to tune or enhance the properties of materials and devices. However, existing techniques to probe the local stress are generally incapable of measuring the entire stress tensor. Here, we make use of an ensemble of atomic-sized in situ strain sensors in diamond (nitrogen-vacancy defects) to achieve spatial mapping of the full stress tensor, with a submicrometer spatial resolution and a sensitivity of the order of 1 MPa (10 MPa) for the shear (axial) stress components. To illustrate the effectiveness and versatility of the technique, we apply it to a broad range of experimental situations, including mapping the stress induced by localized implantation damage, nanoindents, and scratches. In addition, we observe surprisingly large stress contributions from functional electronic devices fabricated on the diamond and also demonstrate sensitivity to deformations of materials in contact with the diamond. Our technique could enable in situ measurements of the mechanical response of diamond nanostructures under various stimuli, with potential applications in strain engineering for diamond-based quantum technologies and in nanomechanical sensing for on-chip mass spectroscopy.
Enhancement of optical processes in coupled plasmonic nanocavities [Invited]
Publisher: The Optical Society
Date: 11-10-2011
DOI: 10.1364/AO.50.000G56
Spatial mapping of band bending in semiconductor devices using in situ quantum sensors
Publisher: Springer Science and Business Media LLC
Date: 13-09-2018
Mid-infrared field concentration of electrically generated surface plasmons polaritons
Publisher: SPIE
Date: 21-01-2012
DOI: 10.1117/12.906738
Measuring the Magnetic Moment Density in Patterned Ultrathin Ferromagnets with Submicrometer Resolution
Publisher: American Physical Society (APS)
Date: 13-07-2015
Nanoscale magnetic field mapping with a single spin scanning probe magnetometer
Publisher: AIP Publishing
Date: 09-04-2012
DOI: 10.1063/1.3703128
Abstract: 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 defect placed at the apex of an atomic force microscope tip. In addition, we report an all-optical magnetic imaging technique which is sensitive to large off-axis magnetic fields, thus extending the operation range of diamond-based magnetometry. Both techniques are illustrated by using a magnetic hard disk as a test s le. Owing to the non-perturbing and quantitative nature of the magnetic probe, this work should open up numerous perspectives in nanomagnetism and spintronics.
Enhanced Widefield Quantum Sensing with Nitrogen-Vacancy Ensembles Using Diamond Nanopillar Arrays
Publisher: American Chemical Society (ACS)
Date: 26-02-2020
High precision single qubit tuning via thermo-magnetic field control
Publisher: AIP Publishing
Date: 05-03-2018
DOI: 10.1063/1.5021491
Abstract: Precise control of the resonant frequency of a spin qubit is of fundamental importance to quantum sensing protocols. We demonstrate a control technique on a single nitrogen-vacancy (NV) centre in diamond where the applied magnetic field is modified by fine-tuning a permanent magnet's magnetisation via temperature control. Through this control mechanism, nanoscale cross-relaxation spectroscopy of both electron and nuclear spins in the vicinity of the NV centre is performed. We then show that through maintaining the magnet at a constant temperature, an order of magnitude improvement in the stability of the NV qubit frequency can be achieved. This improved stability is tested in the polarisation of a small ensemble of nearby 13C spins via resonant cross-relaxation, and the lifetime of this polarisation explored. The effectiveness and relative simplicity of this technique may find use in the realisation of portable spectroscopy and/or hyperpolarisation systems.
Varied Magnetic Phases in a van der Waals Easy-Plane Antiferromagnet Revealed by Nitrogen-Vacancy Center Microscopy
Publisher: American Chemical Society (ACS)
Date: 22-07-2022
Abstract: Interest in van der Waals materials often stems from a desire to miniaturize existing technologies by exploiting their intrinsic layered structures to create near-atomically thin components that do not suffer from surface defects. One appealing property is an easily switchable yet robust magnetic order, which is only sparsely demonstrated in the case of in-plane anisotropy. In this work, we use widefield nitrogen-vacancy (NV) center magnetic imaging to measure the properties of in idual flakes of CuCrP
Related Organisations
Related Funding Activities
Discovery Projects - Grant ID: DP220100178
Start Date: 04-2022
End Date: 03-2025
Amount: $397,000.00
Funder: Australian Research Council
View Funded ActivityARC Future Fellowships - Grant ID: FT200100073
Start Date: 07-2021
End Date: 06-2025
Amount: $769,952.00
Funder: Australian Research Council
View Funded ActivityDiscovery Early Career Researcher Award - Grant ID: DE170100129
Start Date: 01-2017
End Date: 06-2020
Amount: $360,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP200100082
Start Date: 04-2023
End Date: 04-2026
Amount: $451,265.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE180100037
Start Date: 2018
End Date: 12-2018
Amount: $223,039.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE200100098
Start Date: 2020
End Date: 06-2022
Amount: $600,000.00
Funder: Australian Research Council
View Funded Activity