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Nanoscale Nuclear Magnetic Resonance with a Nitrogen-Vacancy Spin Sensor

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TLDR
It is shown that the NV center senses the nanotesla field fluctuations from the protons, enabling both time-domain and spectroscopic NMR measurements on the nanometer scale.
Abstract
Extension of nuclear magnetic resonance (NMR) to nanoscale samples has been a longstanding challenge because of the insensitivity of conventional detection methods. We demonstrated the use of an individual, near-surface nitrogen-vacancy (NV) center in diamond as a sensor to detect proton NMR in an organic sample located external to the diamond. Using a combination of electron spin echoes and proton spin manipulation, we showed that the NV center senses the nanotesla field fluctuations from the protons, enabling both time-domain and spectroscopic NMR measurements on the nanometer scale.

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Quantum sensing

Abstract: "Quantum sensing" describes the use of a quantum system, quantum properties or quantum phenomena to perform a measurement of a physical quantity Historical examples of quantum sensors include magnetometers based on superconducting quantum interference devices and atomic vapors, or atomic clocks More recently, quantum sensing has become a distinct and rapidly growing branch of research within the area of quantum science and technology, with the most common platforms being spin qubits, trapped ions and flux qubits The field is expected to provide new opportunities - especially with regard to high sensitivity and precision - in applied physics and other areas of science In this review, we provide an introduction to the basic principles, methods and concepts of quantum sensing from the viewpoint of the interested experimentalist
Journal ArticleDOI

Nitrogen-Vacancy Centers in Diamond: Nanoscale Sensors for Physics and Biology

TL;DR: A concise overview of the basic properties of diamond, from synthesis to electronic and magnetic properties of embedded NV centers, and how single NV centers can be harnessed for nanoscale sensing are described, including the physical quantities that may be detected, expected sensitivities, and the most common measurement protocols.
Journal ArticleDOI

Magnetometry with nitrogen-vacancy defects in diamond

TL;DR: The physical principles that allow for magnetic field detection with NV centres are presented and first applications of NV magnetometers that have been demonstrated in the context of nano magnetism, mesoscopic physics and the life sciences are discussed.
Journal ArticleDOI

Quantum technologies with optically interfaced solid-state spins

TL;DR: In this article, the authors review recent progress in impurity systems such as colour centres in diamond and silicon carbide, rare-earth ions in solids and donors in silicon and project a possible path to chip-scale quantum technologies through sustained advances in nanofabrication, quantum control and materials engineering.
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Optical magnetic imaging of living cells

TL;DR: This work demonstrates magnetic imaging of living cells (magnetotactic bacteria) under ambient laboratory conditions and with sub-cellular spatial resolution, using an optically detected magnetic field imaging array consisting of a nanometre-scale layer of nitrogen–vacancy colour centres implanted at the surface of a diamond chip.
References
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Journal ArticleDOI

Nanoscale magnetic sensing with an individual electronic spin in diamond

TL;DR: An approach to nanoscale magnetic sensing is experimentally demonstrated, using coherent manipulation of an individual electronic spin qubit associated with a nitrogen-vacancy impurity in diamond at room temperature to achieve detection of 3 nT magnetic fields at kilohertz frequencies after 100 s of averaging.
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Nanoscale imaging magnetometry with diamond spins under ambient conditions

TL;DR: This work shows how magneto-optical spin detection can be used to determine the location of a spin associated with a single nitrogen-vacancy centre in diamond with nanometre resolution under ambient conditions, and demonstrates the use of a single diamond spin as a scanning probe magnetometer to map nanoscale magnetic field variations.
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Ultralong spin coherence time in isotopically engineered diamond

TL;DR: Here, it is demonstrated the synthesis and application of ultrapure isotopically controlled single-crystal chemical vapour deposition (CVD) diamond with a remarkably low concentration of paramagnetic impurities, and single electron spins show the longest room-temperature spin dephasing times ever observed in solid-state systems.
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High-sensitivity diamond magnetometer with nanoscale resolution

TL;DR: In this paper, the use of diamond impurity centres as magnetic field sensors is explored, promising a new approach to single-spin detection and magnetic-field imaging at the nanoscale.
Journal ArticleDOI

Scanning confocal optical microscopy and magnetic resonance on single defect centers

TL;DR: In this article, the fluorescence of individual nitrogen-vacancy defect centers in diamond was observed with room-temperature scanning confocal optical microscopy, and the centers were photostable, showing no detectable change in their fluorescence emission spectrum as a function of time.
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