Optically pumped rubidium atomic magnetometer with elliptically polarized light

Ding, Zicheng; Yuan, Jie; Wang, Zhiguo; Lu, Guangfeng; Luo, Hui

doi:10.1016/j.ijleo.2016.02.071

Cited by 15 publications

(9 citation statements)

References 13 publications

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“…two lower states and one higher state. The energy difference between the two lower states refers to a microwave or a radio-frequency, and the transition between one of the lower and the higher state refers to a spectral line in the optical region [29,30].…”

Section: Optical Pumped Scalar Sensormentioning

confidence: 99%

“…An additional difficulty is that the signal becomes very small when the field is oriented in some directions which are called dead zones. This problem is got over by using several sensors with several orientations for their lightpumping beams [29][30][31][32]. Currently, these types of devices are reasonably limited due to their expense and size of the glass tube keeping the alkali gas.…”

Section: Optical Pumped Scalar Sensormentioning

confidence: 99%

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Magnetic sensors and geometrical magnetoresistance: A review

Mansour

2020

J Met Mater Miner

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Magnetic sensing devices are of the extremely significant kind of detectors, that are used several important and useful applications. Geometrical extraordinary magnetoresistance (EMR) is the geometrical kind of magnetoresistance associated with the non-magnetic semiconductor-metal hybrid structure and influenced by geometrical shape. As a result of Lorentz force, the current path change from metal (in absence of magnetic field) to semiconductor (under the subjection of the magnetic field) in semiconductor-metal hybrid structure is the key of EMR phenomena, i.e. once the metal is placed in a semiconductor, it works as a short circuit with the majority of applied current moving through metallic inhomogeneity and the almost whole resistance of semiconductor-metal hybrid structure drops to value smaller than that of homogeneous semiconductor in absence of magnetic field, in other hands, applying of magnetic field alters the current route to be around the metallic inhomogeneity where it works as an open circuit and the whole resistance turns into a quite high magnitude relies on the geometrical form of a device. The variables govern these phenomena are metal and semiconductor conductivity, semiconductor charge carriers mobility, and device geometry. Within this review, EMR phenomena history, variables governed it, materials, and applications of EMR devices are overviewed.

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Section: Optical Pumped Scalar Sensormentioning

confidence: 99%

Section: Optical Pumped Scalar Sensormentioning

confidence: 99%

Magnetic sensors and geometrical magnetoresistance: A review

Mansour

2020

J Met Mater Miner

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“…It is easy to find that 1/ √ 2 is the optimal value of s by maximizing s √ 1 − s 2 , provided we treat ellipticity as a constant. The corresponding λ/4 waveplate angle φ = π/8 has become a standard configuration when we employ elliptically polarized laser in AMs [14,18]. However we find that a slight deviation of φ from π/8 facilitate a better performance of AMs, especially in the near-resonant condition in our case.…”

Section: Light Intensity and Ellipticity Analysismentioning

confidence: 63%

Elliptically polarized laser-pumped M_x magnetometer towards applications at room temperature

Su¹,

Zhang²,

Bi³

et al. 2019

Opt. Express

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An atomic magnetometer operated with elliptically polarized light is investigated theoretically and experimentally. To explore the potential of this magnetometric configuration, the analytical form of the outgoing signal is derived. Parameters that significantly influence the performance are optimized, which lead to a sensitivity of 300 fT/ √ Hz at 45 • C with a 2×2×2 cm uncoated Rb vapor cell. It is remarkable that a sensitivity of 690 fT/ √ Hz is achieved at room temperature of 24 • C, which is improved by an order of magnitude comparing with the conventional Mx magnetometer under its own optimized condition. The elliptically polarized approach offers attractive features for developing compact, low-power magnetometers, which are available without heating the uncoated vapor cell.

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“…In our work, the optical rotation was measured by a balanced polarimeter, which consists of a half-wave plate, a Wollaston prism and a balanced photodetector. More details on the calculation between the optical rotation and the magnetic field can be found in reference [ 28 , 30 ]. After optimization, the sensitivity of SERF AM was 20 fT/

, and the bandwidth was 1 to 80 Hz ( supplementary information Text, Figure S1 ).…”

Section: Serf Ammentioning

confidence: 99%

Atomic Magnetometer Achieves Visual Salience Analysis in Drosophila

Liu

et al. 2023

Sensors

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An atomic magnetometer (AM) was used to non-invasively detect the tiny magnetic field generated by the brain of a single Drosophila. Combined with a visual stimulus system, the AM was used to study the relationship between visual salience and oscillatory activity of the Drosophila brain by analyzing changes in the magnetic field. Oscillatory activity of Drosophila in the 1–20 Hz frequency band was measured with a sensitivity of 20 fT/Hz. The field in the 20–30 Hz band under periodic light stimulation was used to explore the correlation between short-term memory and visual salience. Our method opens a new path to a more flexible method for the investigation of brain activity in Drosophila and other small insects.

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Optically pumped rubidium atomic magnetometer with elliptically polarized light

Cited by 15 publications

References 13 publications

Magnetic sensors and geometrical magnetoresistance: A review

Magnetic sensors and geometrical magnetoresistance: A review

Elliptically polarized laser-pumped M_x magnetometer towards applications at room temperature

Atomic Magnetometer Achieves Visual Salience Analysis in Drosophila

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Optically pumped rubidium atomic magnetometer with elliptically polarized light

Cited by 15 publications

References 13 publications

Magnetic sensors and geometrical magnetoresistance: A review

Magnetic sensors and geometrical magnetoresistance: A review

Elliptically polarized laser-pumped Mx magnetometer towards applications at room temperature

Atomic Magnetometer Achieves Visual Salience Analysis in Drosophila

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Product

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Elliptically polarized laser-pumped M_x magnetometer towards applications at room temperature