Subnanotesla Magnetometry with a Fiber-Coupled Diamond Sensor

Patel, R. L.; Zhou, Liqin; Frangeskou, Angelo; Stimpson, G. A.; Breeze, Ben; Nikitin, Alexander P.; Dale, Matthew; Nichols, Eleanor C.; Thornley, William; Green, Ben L.; Newton, Mark E.; Edmonds, Andrew M.; Markham, Matthew; Twitchen, D. J.; Morley, Gavin W.

doi:10.1103/physrevapplied.14.044058

Cited by 47 publications

(34 citation statements)

References 49 publications

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“…The detected signal with the PD is connected to a lock-in amplifier (LIA; SRS, SR830). With this setup we were able to achieve 0.5% PL-to-pump-light ratio, which is an order-of-magnitude improvement compared to other fiberized sensors (Patel et al, 2020). A photograph of the Bosch sensor can be seen in Figure 1D.…”

Section: Methodsmentioning

confidence: 80%

“…Approaches to increase the efficiency include, use of solid immersion lenses (Hadden et al, 2010;Siyushev et al, 2010;Sage et al, 2012), or employment of infrared absorption (Acosta et al, 2010;Dumeige et al, 2013;Jensen et al, 2014;Chatzidrosos et al, 2017;Dumeige et al, 2019). Photoluminescence (PL) for fiberized sensors is preferentially collected with the same fiber delivering the pump light but detected on the input side of the fiber (Patel et al, 2020). Despite considerable effort, even modern sensors typically just feature a PL-to-pump-light ratio of about 0.1% (Barry et al, 2016;Patel et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Photoluminescence (PL) for fiberized sensors is preferentially collected with the same fiber delivering the pump light but detected on the input side of the fiber (Patel et al, 2020). Despite considerable effort, even modern sensors typically just feature a PL-to-pump-light ratio of about 0.1% (Barry et al, 2016;Patel et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Fiberized Diamond-Based Vector Magnetometers

et al. 2021

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We present two fiberized vector magnetic-field sensors, based on nitrogen-vacancy (NV) centers in diamond. The sensors feature sub-nT/Hz magnetic sensitivity. We use commercially available components to construct sensors with a small sensor size, high photon collection, and minimal sensor-sample distance. Both sensors are located at the end of optical fibres with the sensor-head freely accessible and robust under movement. These features make them ideal for mapping magnetic fields with high sensitivity and spatial resolution (≤ mm). As a demonstration we use one of the sensors to map the vector magnetic field inside the bore of a ≥100 mT Halbach array. The vector field sensing protocol translates microwave spectroscopy data addressing all diamonds axes and including double quantum transitions to a 3D magnetic field vector.

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Section: Methodsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Fiberized Diamond-Based Vector Magnetometers

et al. 2021

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“…Solid-state spin systems have transitioned from physics demonstrations to promising quantum sensors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] as performance has improved through materials engineering [17][18][19][20][21][22][23][24][25], coherent control [26][27][28][29][30][31][32][33][34][35], and novel readout [36][37][38][39][40][41][42][43]. While performance now rivals atomic-based sensors [44][45][46][47][48][49], solid-state systems still maintain much of the complexity of their atomic counterparts …”

Section: Introductionmentioning

confidence: 99%

Thermally-Polarized Solid-State Spin Sensor

Wilcox¹,

Eisenach²,

Barry³

et al. 2021

Preprint

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“…Quantum metrology, emerged as a rapidly developing quantum technology, provides a new brand of methodology for realizing high-precision measurements of physical quantities with the help of quantum resources [1][2][3]. It has wide applications from gravitational wave detection [4], super-resolution optical imaging [5,6] to quantum thermometries [7,8] and ultra-sensitive magnetometers [9,10]. Entanglement is the most common quantum resource to improve the metrology precision.…”

Section: Introductionmentioning

confidence: 99%

Gaussian quantum metrology in a dissipative environment

Wu,

2021

Preprint

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Quantum metrology pursues high-precision measurements to physical quantities by using quantum resources. However, the decoherence generally hinders its performance. Previous work found that the metrology error tends to divergent in the long-encoding-time regime due to the Born-Markovian approximate decoherence, which is called no-go theorem of noisy quantum metrology. We here propose a Gaussian quantum metrology scheme using bimodal quantized optical fields as quantum probe. It achieves the precision of sub-Heisenberg limit in the ideal case. However, the Markovian decoherence causes the metrological error contributed from the center-of-mass mode of the probe to be divergent. A mechanism to remove this ostensible no-go theorem is found in the non-Markovian dynamics. Our result gives an efficient way to realize high-precision quantum metrology in practical continuous-variable systems.

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Subnanotesla Magnetometry with a Fiber-Coupled Diamond Sensor

Cited by 47 publications

References 49 publications

Fiberized Diamond-Based Vector Magnetometers

Fiberized Diamond-Based Vector Magnetometers

Thermally-Polarized Solid-State Spin Sensor

Gaussian quantum metrology in a dissipative environment

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