Harmonic detection of magnetic resonance for sensitivity improvement of optical atomic magnetometers

Ranjbaran, M.; Tehranchi, M.M.; Hamidi, S. M.; Khalkhali, S.M.H.

doi:10.1016/j.jmmm.2016.10.058

Cited by 18 publications

(4 citation statements)

References 21 publications

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“…In order to detect the moving magnetic object, we used an M x -atomic magnetometer as sketched in Fig. 1(a) 20,21,[35][36][37][38] . The atomic magnetometer was mounted inside of a three-layer µ-metal magnetic shielding providing a passive reduction of the magnetic field.…”

Section: Methodsmentioning

confidence: 99%

Position and Direction Tracking of a Magnetic Object Based on an Mx-Atomic Magnetometer

Soheilian

Ranjbaran

Tehranchi

2020

Sci Rep

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Remote and non-invasive tracking of a moving magnetic object based on an atomic magnetometer has been developed recently. the sensitivity of atomic magnetometers is limited by mechanisms that relax the spin precession of alkali atoms. Meanwhile, some of these mechanisms such as magnetic field gradient are applicable in magnetic object tracking. Correspondingly, we have illustrated a way of operating an M x atomic magnetometer to measure the magnetic field and its gradient simultaneously for a moving magnetic microwire, which resulted in recording a spike-like signal. We described the dependency of the signal on the position, velocity, and direction of the microwire. According to the results, the measurement of the inhomogeneous local magnetic field gradient opens new ways for obtaining the direction of the velocity of magnetic objects accessible in cells with large sizes. Furthermore, the accuracy of the velocimetry was found as 40 µm/s which could be an important means for assessing the microvascular blood flow.

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Section: Methodsmentioning

confidence: 99%

Position and Direction Tracking of a Magnetic Object Based on an Mx-Atomic Magnetometer

Soheilian

Ranjbaran

Tehranchi

2020

Sci Rep

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“…Sensors and especially magnetic field sensors, are found in various applications such as biomedical, smart mobiles, aerospace, communication industries, and Micro Electromechanical Systems (MEMS) systems [1][2][3][4][5][6][7][8][9][10][11]. To use these sensors in MEMS systems, it is necessary to get a miniaturized state with high performance, low price, high sensitivity, low power consumption, and portable style [12,13].…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive Magneto electric Sensor based on Galfenol/ AlN structure

Haghparast

Tehranchi

Hamidi

2022

Preprint

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Ultrasensitive magnetic field sensors based on magnetoelectric (ME) structures have many applications in bio-magnetic sensors and magnetoencephalography (MEG) scanners. Enhance the sensitivity, limit of detection and main frequency of these sensors need simulation process by accurate methods such as finite element method (FEM). To get good sensitivity and efficient benefit, we use a cantilever-type composite structures including galfenol alloy as a magnetostrictive layer and AlN as a piezoelectric layer. Galfenol is an alloy of iron and gallium and its ${\text{Fe}}_{\text{0.83}}{\text{Ga}}_{\text{0.17}}$ structure has a high magnetostriction coefficient and can be used as a thin film. According to the cantilever structure, the maximum bending of the structure is 20 $\text{μm}$. The simulated sensor has a limit of detections of 1 $\raisebox{1ex}{$\text{pT}$}\!\left/ \!\raisebox{-1ex}{$\sqrt{\text{Hz}}$}\right.$ and can measure an AC magnetic field of 1 pT. This sensor has the best performance in the bias DC magnetic field of 2.3 mT and resonance frequency of 2521.8 Hz and has a magnetoelectric coefficient of 4865 ($\raisebox{1ex}{$\text{V}$}\!\left/ \!\raisebox{-1ex}{$\text{cm.Oe}$}\right.$).

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“…The interaction of alkali atoms with light is the cornerstone of valuable applications such as atomic magnetometers, atomic clocks, and miniaturized atomic sensors [1] [2]. These miniaturized atomic sensors can enhance the spatial resolution by reducing the size by manipulating the optical field in low dimensions via near-field modes [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Trace of evanescent wave polarization by atomic vapor spectroscopy

Mosleh

RANJBARAN

Hamidi

2021

Preprint

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Various efforts have been made to determine the polarization state of evanescent waves in different structures. The present study shows the reliability of magneto-optical spectroscopy of D1 and D2 lines of rubidium metal and polarization-dependent transitions to investigate and trace the changes in the polarization state of evanescent fields during total internal reflection over different angles. For this purpose, we design and fabricate atomic evanescent Rb vapor cells and examine the effect of polarization changes of evanescent waves, depending on the propagation direction of evanescent waves in anisotropic rubidium vapor media under different external magnetic field configurations theoretically and experimentally. The results confirm the dependency of allowed transitions on the magneto optical configuration as a tool to determine changes in the polarization of evanescent waves in more complicated wave states in anisotropic media.

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Harmonic detection of magnetic resonance for sensitivity improvement of optical atomic magnetometers

Cited by 18 publications

References 21 publications

Position and Direction Tracking of a Magnetic Object Based on an Mx-Atomic Magnetometer

Position and Direction Tracking of a Magnetic Object Based on an Mx-Atomic Magnetometer

Ultrasensitive Magneto electric Sensor based on Galfenol/ AlN structure

Trace of evanescent wave polarization by atomic vapor spectroscopy

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