Miniature Cavity-Enhanced Diamond Magnetometer

Chatzidrosos, Georgios; Wickenbrock, Arne; Bougas, Lykourgos; Leefer, N.; Wu, Teng; Jensen, Kasper; Dumeige, Yannick; Budker, Dmitry

doi:10.1103/physrevapplied.8.044019

Cited by 92 publications

(96 citation statements)

References 21 publications

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“…We have shown that magnetometry based on the IR absorption associated to the singlet states of the NV − center can be implemented by integrating a diamond sample containing the NV centers inside an external half-VCSEL cavity. This scheme does not require a narrow linewidth stabilized IR laser as in realizations based on multi-pass absorption in a resonant passive cavity [16]. Compared to previous proposals consisting of a diamond laser using the NV − centers for optical amplification, the detrimental effects of both the parasitic ESA by the triplet excited state and the photoconversion to the NV 0 charge state are also circumvented since the optical gain is obtained from an independent system.…”

Section: Resultsmentioning

confidence: 99%

Infrared laser threshold magnetometry with a NV doped diamond intracavity etalon

Dumeige¹,

Roch²,

Bretenaker³

et al. 2019

Opt. Express

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We propose an hybrid laser system consisting of a semiconductor external cavity laser associated to an intra-cavity diamond etalon doped with nitrogen-vacancy color centers. We consider laser emission tuned to the infrared absorption line that is enhanced under the magnetic field dependent nitrogen-vacancy electron spin resonance and show that this architecture leads to a compact solid-state magnetometer that can be operated at room-temperature. The sensitivity to the magnetic field limited by the photon shot-noise of the output laser beam is estimated to be around 250 fT/ √ Hz. Unlike usual NV center infrared magnetometry, this method would not require an external frequency stabilized laser. Since the proposed system relies on the competition between the laser threshold and an intracavity absorption, such laser-based optical sensor could be easily adapted to a broad variety of physical systems.

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Section: Resultsmentioning

confidence: 99%

Infrared laser threshold magnetometry with a NV doped diamond intracavity etalon

Dumeige¹,

Roch²,

Bretenaker³

et al. 2019

Opt. Express

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“…In particular, negatively charged nitrogen-vacancy (NV) centers in single-crystal diamond provide high-sensitivity magnetic sensing and high-resolution imaging [9][10][11] . To date, diamondbased vector magnetometers have been based on using the optically detected magnetic resonance (ODMR) technique with the requirement of applying microwaves (MWs) sequentially or simultaneously [12][13][14] .…”

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confidence: 99%

Microwave-Free Vector Magnetometry with Nitrogen-Vacancy Centers along a Single Axis in Diamond

et al. 2020

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We propose and demonstrate a microwave-free vector magnetometer that simultaneously measures all Cartesian components of a magnetic field using nitrogen-vacancy (NV) ensembles in diamond. With fixed crystallographic axes inherent to the solid-state system, the present magnetometer leverages the level anticrossing in the triplet ground state at 102.4 mT, and is capable of measuring all three components of the magnetic field. Vector capability is proffered by modulating fields along the preferential NV axis and in the transverse plane and subsequent demodulation of the signal. This sensor exhibits a root mean square noise floor of ≈ 300 pT / √ Hz in all directions. The present technique is broadly applicable to both ensem-arXiv:1904.04361v1 [physics.app-ph]

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“…In systems containing an addressable spin of interest ("the spin qubit"), such as phosphorus donors in silicon and nitrogenvacancy (NV) centers in diamond, such spin-bath noise acts as the main decoherence source of the system [1][2][3][4][5]. The first step towards enabling full coherent control of such spin qubits, whose applications range from quantum information processing [6][7][8][9] to metrology [10][11][12][13][14][15], involves full spectral analysis of the spin-bath noise.…”

Section: Introductionmentioning

confidence: 99%

Characterizing spin-bath parameters using conventional and time-asymmetric Hahn-echo sequences

Farfurnik

Bar‐Gill

2020

Phys. Rev. B

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Spin-bath noise characterization, which is typically performed by multi-pulse control sequences, is essential for understanding most spin dynamics in the solid-state. Here, we theoretically propose a method for extracting the characteristic parameters of a noise source with a known spectrum, using modified Hahn-echo pulses. By varying the application time of the pulse, measuring the coherence curves of an addressable spin, and fitting these curves to a theoretical function derived by us, we extract parameters characterizing the physical nature of the noise. Assuming a Lorentzian noise spectrum, we illustrate this method for extracting the correlation time of a bath of nitrogen paramagnetic impurities in diamond, and its coupling strength to the addressable spin of a nitrogen-vacancy center. First, we demonstrate that fitting conventional Hahn-echo measurements to the explicit coherence function is essential for extracting the correct parameters in the general physical regime, for which common methods relying on the assumption of a slow bath are inaccurate. Second, considering a realistic experimental scenario with a 5% noise floor, we simulate the extraction of these parameters utilizing the asymmetric Hahn-echo scheme. The scheme is effective for samples having a natural homogeneous coherence time (T2) up to two orders of magnitude greater than the inhomogeneous coherence time (T * 2 ). In the presence of realistic technical drifts for which averaging capabilities are limited, we simulate more than a factor of 3 improvement of the extracted parameter uncertainties over conventional Hahn-echo measurements. Beyond its potential for reducing experiment times by an order-of-magnitude, such single-pulse noise characterization could minimize the effects of long time-scale drifts and accumulating pulse imperfections and numerical errors.

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Miniature Cavity-Enhanced Diamond Magnetometer

Cited by 92 publications

References 21 publications

Infrared laser threshold magnetometry with a NV doped diamond intracavity etalon

Infrared laser threshold magnetometry with a NV doped diamond intracavity etalon

Microwave-Free Vector Magnetometry with Nitrogen-Vacancy Centers along a Single Axis in Diamond

Characterizing spin-bath parameters using conventional and time-asymmetric Hahn-echo sequences

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