High-efficiency resonant amplification of weak magnetic fields for single spin magnetometry at room temperature

Trifunovic, Luka; Pedrocchi, Fabio L.; Hoffman, Silas; Maletinsky, Patrick; Yacoby, Amir; Loss, Daniel

doi:10.1038/nnano.2015.74

Cited by 25 publications

(19 citation statements)

References 48 publications

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“…For example, broadband-localized surface plasmons can typically lead to strong electromagnetic enhancement in the near field of metal nanoparticles, while Förster resonance energy transfer (FRET) might occur due to discrete energy level interactions (that is, long range dipole–dipole interactions) in the proximity of semiconducting nanostructures 20 21 22 23 . In addition, magnetic dipole coupling between the NV centres and the optically oriented spins in semiconducting or magnetic nanostructures on the surface might enable a new class of self-assembled quantum systems 24 25 26 . The strength of such fundamental interactions strongly depends on the inter-particle spacing and the nature of external functional units.…”

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confidence: 99%

Nanodiamond-based nanostructures for coupling nitrogen-vacancy centres to metal nanoparticles and semiconductor quantum dots

2016

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The ability to control the interaction between nitrogen-vacancy centres in diamond and photonic and/or broadband plasmonic nanostructures is crucial for the development of solid-state quantum devices with optimum performance. However, existing methods typically employ top-down fabrication, which restrict scalable and feasible manipulation of nitrogen-vacancy centres. Here, we develop a general bottom-up approach to fabricate an emerging class of freestanding nanodiamond-based hybrid nanostructures with external functional units of either plasmonic nanoparticles or excitonic quantum dots. Precise control of the structural parameters (including size, composition, coverage and spacing of the external functional units) is achieved, representing a pre-requisite for exploring the underlying physics. Fine tuning of the emission characteristics through structural regulation is demonstrated by performing single-particle optical studies. This study opens a rich toolbox to tailor properties of quantum emitters, which can facilitate design guidelines for devices based on nitrogen-vacancy centres that use these freestanding hybrid nanostructures as building blocks.

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confidence: 99%

Nanodiamond-based nanostructures for coupling nitrogen-vacancy centres to metal nanoparticles and semiconductor quantum dots

2016

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“…Other techniques, such as dynamic nuclear polarization 52 , selective polarization transfer 17 19 20 22 , the quantum spin amplification mediated by a single external spin 53 , could give additional signal enhancements. Schemes employing ferromagnetic resonances to increase the range/sensitivity could provide other factors for resolution improvement 54 55 . The presented method is efficient for the reconstructing structural information and spins distribution at the nanoscale whenever it is possible to perform three-dimensional encoding.…”

Section: Discussionmentioning

confidence: 99%

A nitrogen-vacancy spin based molecular structure microscope using multiplexed projection reconstruction

Lazariev

Balasubramanian

2015

Sci Rep

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Methods and techniques to measure and image beyond the state-of-the-art have always been influential in propelling basic science and technology. Because current technologies are venturing into nanoscopic and molecular-scale fabrication, atomic-scale measurement techniques are inevitable. One such emerging sensing method uses the spins associated with nitrogen-vacancy (NV) defects in diamond. The uniqueness of this NV sensor is its atomic size and ability to perform precision sensing under ambient conditions conveniently using light and microwaves (MW). These advantages have unique applications in nanoscale sensing and imaging of magnetic fields from nuclear spins in single biomolecules. During the last few years, several encouraging results have emerged towards the realization of an NV spin-based molecular structure microscope. Here, we present a projection-reconstruction method that retrieves the three-dimensional structure of a single molecule from the nuclear spin noise signatures. We validate this method using numerical simulations and reconstruct the structure of a molecular phantom β-cyclodextrin, revealing the characteristic toroidal shape.

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“…In this paper, we propose a scheme to transfer quantum states faithfully between a superconducting flux qubit and a single-NV-center spin via the ferromagnetic material yttrium iron garnet (YIG) [9,10]. YIG has been proposed as a mediator for classical magnetic fields to enhance the sensitivity of a NV magnetometer to achieve single nuclear spin detection [11]. In addition, the large number of spins in YIG with strong exchange interaction leads to collective-excitation modes with narrow linewidths at low temperature [12,13].…”

Section: Introductionmentioning

confidence: 99%

Single-nitrogen-vacancy-center quantum memory for a superconducting flux qubit mediated by a ferromagnet

et al. 2018

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We propose a quantum memory scheme to transfer and store the quantum state of a superconducting flux qubit (FQ) into the electron spin of a single nitrogen-vacancy (NV) center in diamond via yttrium iron garnet (YIG), a ferromagnet. Unlike an ensemble of NV centers, the YIG moderator can enhance the effective FQ-NV-center coupling strength without introducing additional appreciable decoherence. We derive the effective interaction between the FQ and the NV center by tracing out the degrees of freedom of the collective mode of the YIG spins. We demonstrate the transfer, storage, and retrieval procedures, taking into account the effects of spontaneous decay and pure dephasing. Using realistic experimental parameters for the FQ, NV center and YIG, we find that a combined transfer, storage, and retrieval fidelity higher than 0.9, with a long storage time of 10 ms, can be achieved. This hybrid system not only acts as a promising quantum memory, but also provides an example of enhanced coupling between various systems through collective degrees of freedom.

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High-efficiency resonant amplification of weak magnetic fields for single spin magnetometry at room temperature

Cited by 25 publications

References 48 publications

Nanodiamond-based nanostructures for coupling nitrogen-vacancy centres to metal nanoparticles and semiconductor quantum dots

Nanodiamond-based nanostructures for coupling nitrogen-vacancy centres to metal nanoparticles and semiconductor quantum dots

A nitrogen-vacancy spin based molecular structure microscope using multiplexed projection reconstruction

Single-nitrogen-vacancy-center quantum memory for a superconducting flux qubit mediated by a ferromagnet

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