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Journal articles on the topic 'Optical Atomic Magnetometry'

Author: Grafiati

Published: 14 March 2023

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1

Li, Rujie, Christopher Perrella, and André Luiten. "Enhancing the sensitivity of atomic magnetometer with a multi-passed probe light." Applied Physics Letters 121, no. 17 (2022): 172402. http://dx.doi.org/10.1063/5.0119222.

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Atomic magnetometry has spectacular magnetic field sensitivity at room temperature. Here, we theoretically and experimentally investigate the benefits of a multi-pass cell in magnetometers using nonlinear magneto-optical rotation interrogation. Our theoretical analysis shows that there is an improvement in the signal-to-noise ratio (SNR) and consequently on the magnetic field sensitivity by carefully choosing the number of passes through the medium. In our specific case, we experimentally demonstrate a 160% enhancement in the magnetometer sensitivity by using a triple-pass cell, and it is cons

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2

Song, Shupei, Xining Li, Xinyi Zhu, et al. "An integrated and scalable experimental system for nitrogen-vacancy ensemble magnetometry." Review of Scientific Instruments 94, no. 1 (2023): 014703. http://dx.doi.org/10.1063/5.0125441.

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Nitrogen-vacancy (NV) centers in diamond are extremely promising solid-state spin quantum sensors for magnetic field in recent years. The rapid development of NV-ensemble magnetometry has put forward higher requirements for high-speed data acquisition, real-time signal processing and analyzing, etc. However, the existing commercial instruments are bulky and expensive, which brings extra complexity to the weak magnetic field detection experiment and hinders the practicality and miniaturization of NV-ensemble magnetometry. Here, we report on an integrated and scalable experimental system based o

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3

Orzechowska, Zuzanna, Mariusz Mrózek, Wojciech Gawlik, and Adam Wojciechowski. "Preparation and characterization of AFM tips with nitrogen-vacancy and nitrogen-vacancy-nitrogen color centers." Photonics Letters of Poland 13, no. 2 (2021): 28. http://dx.doi.org/10.4302/plp.v13i2.1095.

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We demonstrate a simple dip-coating method of covering standard AFM tips with nanodiamonds containing color centers. Such coating enables convenient visualization of AFM tips above transparent samples as well as using the tip for performing spatially resolved magnetometry. Full Text: PDF ReferencesG. Binnig, C. F. Quate, C. Gerber, "Atomic Force Microscope", Phys. Rev. Lett. 56, 930 (1986). CrossRef F .J. Giessibl, "Advances in atomic force microscopy", Rev. Mod. Phys. 75, 949 (2003). CrossRef S. Kasas, G. Dietler, "Probing nanomechanical properties from biomolecules to living cells", Eur. J.

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4

Li, Bei-Bei, Jan Bílek, Ulrich B. Hoff, et al. "Quantum enhanced optomechanical magnetometry." Optica 5, no. 7 (2018): 850. http://dx.doi.org/10.1364/optica.5.000850.

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Fatemi, Fredrik K., and Mark Bashkansky. "Spatially resolved magnetometry using cold atoms in dark optical tweezers." Optics Express 18, no. 3 (2010): 2190. http://dx.doi.org/10.1364/oe.18.002190.

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6

Dyakonov, Vladimir, Hannes Kraus, V. A. Soltamov, et al. "Atomic-Scale Defects in Silicon Carbide for Quantum Sensing Applications." Materials Science Forum 821-823 (June 2015): 355–58. http://dx.doi.org/10.4028/www.scientific.net/msf.821-823.355.

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Atomic-scale defects in silicon carbide exhibit very attractive quantum properties that can be exploited to provide outstanding performance in various sensing applications. Here we provide the results of our studies of the spin-optical properties of the vacancy related defects in SiC. Our studies show that several spin-3/2 defects in silicon carbide crystal are characterized by nearly temperature independent axial crystal fields, which makes these defects very attractive for vector magnetometry. The zero-field splitting of another defect exhibits on contrast a giant thermal shift of 1.1 MHz/K

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Maayani, Shai, Christopher Foy, Dirk Englund, and Yoel Fink. "Distributed Quantum Fiber Magnetometry." Laser & Photonics Reviews 13, no. 7 (2019): 1900075. http://dx.doi.org/10.1002/lpor.201900075.

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8

Zhang, Qiaolin, Hui Sun, Shuangli Fan, and Hong Guo. "High-sensitivity optical Faraday magnetometry with intracavity electromagnetically induced transparency." Journal of Physics B: Atomic, Molecular and Optical Physics 49, no. 23 (2016): 235503. http://dx.doi.org/10.1088/0953-4075/49/23/235503.

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Li, Bei-Bei, George Brawley, Hamish Greenall, et al. "Ultrabroadband and sensitive cavity optomechanical magnetometry." Photonics Research 8, no. 7 (2020): 1064. http://dx.doi.org/10.1364/prj.390261.

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10

Belfi, J., G. Bevilacqua, V. Biancalana, Y. Dancheva, and L. Moi. "All optical sensor for automated magnetometry based on coherent population trapping." Journal of the Optical Society of America B 24, no. 7 (2007): 1482. http://dx.doi.org/10.1364/josab.24.001482.

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Li, Siran, Danyue Ma, Kun Wang, et al. "High sensitivity closed-loop Rb optically pumped magnetometer for measuring nuclear magnetization." Optics Express 30, no. 24 (2022): 43925. http://dx.doi.org/10.1364/oe.473654.

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Rb optically pumped magnetometer (OPM) based on electron paramagnetic resonance (EPR) show advantages to measure the nuclear magnetization and have succeeded in fundamental physics and rotation sensing, etc. The magnetometry sensitivity is a key performance of these Rb OPMs which should be improved. In this study, a high sensitivity Rb OPM is demonstrated theoretically and experimentally. To improve the sensitivity, acousto-optic modulation based on balanced detection is applied to suppress the probe noises. Compared with the conventional optical rotation detection for this OPM configuration,

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12

Lou, Janet W., and Geoffrey A. Cranch. "Optical frequency dependence of the light shift effect for vector magnetometry with cesium." Applied Optics 59, no. 7 (2020): 2072. http://dx.doi.org/10.1364/ao.379800.

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LIU, HONG, JIANGUO ZHU, and DINGQUAN XIAO. "PREPARATION AND CHARACTERIZATION OF LaFeO3 THIN FILMS ON (100) SrTiO3 SUBSTRATES BY PULSED LASER DEPOSITION." Journal of Advanced Dielectrics 01, no. 03 (2011): 363–67. http://dx.doi.org/10.1142/s2010135x11000379.

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A single-crystalline, crack-free, epitaxial (100)c LaFeO3 films were in situ grown by pulsed laser deposition on (100) SrTiO3 substrates. X-ray diffraction, atomic force microscopy and transmission electron microscopy reveal that the LaFeO3 films have high crystalline quality, a very smooth surface, and an atomically sharp LaFeO3/SrTiO3 interface. The magnetic properties of the LaFeO3 films were obtained by a superconducting quantum interference device magnetometry. The saturated magnetization and coercive field of LaFeO3 films are 14 emu/cm3 and 600 Oe, respectively.

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Zhang, Rui, Teng Wu, Jingbiao Chen, Xiang Peng, and Hong Guo. "Frequency Response of Optically Pumped Magnetometer with Nonlinear Zeeman Effect." Applied Sciences 10, no. 20 (2020): 7031. http://dx.doi.org/10.3390/app10207031.

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Optically pumped alkali atomic magnetometers based on measuring the Zeeman shifts of the atomic energy levels are widely used in many applications because of their low noise and cryogen-free operation. When alkali atomic magnetometers are operated in an unshielded geomagnetic environment, the nonlinear Zeeman effect may become non-negligible at high latitude and the Zeeman shifts are thus not linear to the strength of the magnetic field. The nonlinear Zeeman effect causes broadening and partial splitting of the magnetic resonant levels, and thus degrades the sensitivity of the alkali atomic ma

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Farfurnik, D., A. Jarmola, D. Budker, and N. Bar-Gill. "Spin ensemble-based AC magnetometry using concatenated dynamical decoupling at low temperatures." Journal of Optics 20, no. 2 (2018): 024008. http://dx.doi.org/10.1088/2040-8986/aaa1bf.

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16

Weis, A., and R. Wynands. "Laser-based precision magnetometry in fundamental and applied research." Optics and Lasers in Engineering 43, no. 3-5 (2005): 387–401. http://dx.doi.org/10.1016/j.optlaseng.2004.03.010.

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17

Li, Bei-Bei, Lingfeng Ou, Yuechen Lei, and Yong-Chun Liu. "Cavity optomechanical sensing." Nanophotonics 10, no. 11 (2021): 2799–832. http://dx.doi.org/10.1515/nanoph-2021-0256.

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Abstract Cavity optomechanical systems enable interactions between light and mechanical resonators, providing a platform both for fundamental physics of macroscopic quantum systems and for practical applications of precision sensing. The resonant enhancement of both mechanical and optical response in the cavity optomechanical systems has enabled precision sensing of multiple physical quantities, including displacements, masses, forces, accelerations, magnetic fields, and ultrasounds. In this article, we review the progress of precision sensing applications using cavity optomechanical systems.

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18

Jin, Kai, Xuxing Geng, Zhi Liang, et al. "Design of Portable Self-Oscillating VCSEL-Pumped Cesium Atomic Magnetometer." Electronics 11, no. 22 (2022): 3666. http://dx.doi.org/10.3390/electronics11223666.

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With the demand for fast response of magnetic field measurement and the development of laser diode technology, self-oscillating laser-pumped atomic magnetometers have become a new development trend. In this work, we designed a portable self-oscillating VCSEL-pumped Cs atom magnetometer, including the probe (optical path) and circuits. The signal amplification and feedback loop of the magnetometer, VCSEL laser control unit, and atomic cell temperature control unit were realized. We tested the performance of the magnetometer in the metering station. Finally, the performance of the VCSEL-pumped m

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19

Guevara De Jesus, Michael, Zhuyun Xiao, Maite Goiriena-Goikoetxea, et al. "Magnetic state switching in FeGa microstructures." Smart Materials and Structures 31, no. 3 (2022): 035005. http://dx.doi.org/10.1088/1361-665x/ac46db.

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Abstract This work demonstrates that magnetoelectric composite heterostructures can be designed at the length scale of 10 µms that can be switched from a magnetized state to a vortex state, effectively switching the magnetization off, using electric field induced strain. This was accomplished using thin film magnetoelectric heterostructures of Fe81.4Ga18.6 on a single crystal (011) [Pb(Mg1/3Nb2/3)O3]0.68-[PbTiO3]0.32 (PMN-32PT) ferroelectric substrate. The heterostructures were tripped from a multi-domain magnetized state to a flux closure vortex state using voltage induced strain in a piezoel

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20

Zamani, Amin, Maliheh Ranjbaran, Mohammad Mehdi Tehranchi, Seyedeh Mehri Hamidi, and Seyed Mohammad Hosein Khalkhali. "Myocardial Ischemia Detection by a Sensitive Pump-Probe Atomic Magnetometer." Journal of Lasers in Medical Sciences 13, no. 1 (2022): e24-e24. http://dx.doi.org/10.34172/jlms.2022.24.

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Introduction: Magnetocardiography (MCG) based on optical atomic magnetometers has shown promise for detecting heart diseases accurately. Different methods were introduced to improve the sensitivity of detecting magnetic fields during cardiac activity. Methods: In this paper, an optical pump-probe magnetometer operated on the ground-state Hanle effect based on the zero-field level crossing technique was developed and the laser output signal was optimized in an unshielded environment. Then, the optical magnetometer was utilized to record the simulated MCG trace of different stages of myocardial

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Lu, Jixi, Jing Wang, Ke Yang, et al. "In-Situ Measurement of Electrical-Heating-Induced Magnetic Field for an Atomic Magnetometer." Sensors 20, no. 7 (2020): 1826. http://dx.doi.org/10.3390/s20071826.

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Electrical heating elements, which are widely used to heat the vapor cell of ultrasensitive atomic magnetometers, inevitably produce a magnetic field interference. In this paper, we propose a novel measurement method of the amplitude of electrical-heating-induced magnetic field for an atomic magnetometer. In contrast to conventional methods, this method can be implemented in the atomic magnetometer itself without the need for extra magnetometers. It can distinguish between different sources of magnetic fields sensed by the atomic magnetometer, and measure the three-axis components of the magne

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Lee, Hyunjoon, Kiwoong Kim, Seong-Joo Lee, et al. "Development of spin-exchange relaxation free magnetometer with a compact heating system." ACTA IMEKO 2, no. 1 (2013): 16. http://dx.doi.org/10.21014/acta_imeko.v2i1.46.

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Atomic magnetometers based on spin-exchange relaxation free (SERF) regime typically operate with the high optical density and low magnetic fields. We present SERF magnetometer with a compact heating system for compact and efficient temperature control. A resistive heating system with high frequency alternating current was used to achieve high optical density. The current frequency was carefully chosen to avoid resonance with the atomic magnetometer. This resulted in a compact heating system that also allows independent operation of multiple heating systems. Optical rotation signal was obtained

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23

Duò, L., M. Marcon, and F. Ciccacci. "Input electron optics for Mott detectors used in secondary electron magnetometry." Journal of Electron Spectroscopy and Related Phenomena 95, no. 2-3 (1998): 255–60. http://dx.doi.org/10.1016/s0368-2048(98)00250-3.

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Masuyama, Yuta, Katsumi Suzuki, Akira Hekizono, et al. "Gradiometer Using Separated Diamond Quantum Magnetometers." Sensors 21, no. 3 (2021): 977. http://dx.doi.org/10.3390/s21030977.

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The negatively charged nitrogen-vacancy (NV) center in diamonds is known as the spin defect and using its electron spin, magnetometry can be realized even at room temperature with extremely high sensitivity as well as a high dynamic range. However, a magnetically shielded enclosure is usually required to sense weak magnetic fields because environmental magnetic field noises can disturb high sensitivity measurements. Here, we fabricated a gradiometer with variable sensor length that works at room temperature using a pair of diamond samples containing negatively charged NV centers. Each diamond

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25

Matthews, A. J., J. P. Watts, M. Zhu, et al. "Current breakdown of the integer and fractional quantum Hall effects detected by torque magnetometry." Physica E: Low-dimensional Systems and Nanostructures 6, no. 1-4 (2000): 140–43. http://dx.doi.org/10.1016/s1386-9477(99)00079-x.

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26

Zeng, Xian Jin, Mo Si Hao, Qing Meng Li, Qiang Liu, Jun Hai Zhang, and Wei Min Sun. "A Design of Cesium Atomic Magnetometer Based on Circular Dichroism." Applied Mechanics and Materials 203 (October 2012): 268–72. http://dx.doi.org/10.4028/www.scientific.net/amm.203.268.

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Recently, atomic magnetometers have been reported as the most sensitive magnetometers by completely eliminating the spin exchange relaxation. In this paper, we described a design of highly sensitive cesium atomic magnetometer based on circular dichroism, which had the advantage of easily locking the probing laser to the necessary frequency compared with those based on circular birefringence. In order to polarize the cesium atoms uniformly, the pumping laser light was separated into two counter-propagating and counter-circular polarization beams through the atomic vapor cell. We employed a circ

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27

Mihailovic, Pedja, and Slobodan Petricevic. "Fiber Optic Sensors Based on the Faraday Effect." Sensors 21, no. 19 (2021): 6564. http://dx.doi.org/10.3390/s21196564.

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Some 175 years ago Michael Faraday discovered magnetic circular birefringence, now commonly known as the Faraday effect. Sensing the magnetic field through the influence that the field has on light within the fiber optic sensor offers several advantages, one of them fundamental. These advantages find application in the measurement of electric current at high voltages by measuring the induced magnetic field, thus warranting application for this kind of fiber optic sensor (FOS) in future smart grids. Difficulties in designing and manufacturing high-performance FOSs were greatly alleviated by dev

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Вершовский, А. К., С. П. Дмитриев, Г. Г. Козлов, А. С. Пазгалев та М. В. Петренко. "Проекционный спиновый шум в оптических квантовых датчиках на тепловых атомах". Журнал технической физики 90, № 8 (2020): 1243. http://dx.doi.org/10.21883/jtf.2020.08.49533.438-19.

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The paper theoretically and experimentally investigates the fundamental limitations imposed by spin (or atomic) quantum projection noise on the sensitivity of optical quantum sensors based on thermal atoms (this class of devices includes frequency standards, magnetometers, and gyroscopes using optical detection of electron paramagnetic resonance). The effect of increasing the rms amplitude of the projection noise in the magnetometric scheme under the influence of strong optical pumping is demonstrated, its explanation is proposed and experimentally tested - it is shown that in a wide range of

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Ma, Yintao, Zhixia Qiao, Mingzhi Yu, et al. "Single-beam integrated hybrid optical pumping spin exchange relaxation free magnetometer for biomedical applications." Applied Physics Letters 121, no. 11 (2022): 114001. http://dx.doi.org/10.1063/5.0105945.

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An ingenious approach to accomplish the high signal strengthen and relatively homogeneous spin polarization has been presented in a hybrid optical pumping spin-exchange-relaxation-free atomic magnetometer only utilizing single-beam configuration. We have experimentally demonstrated an approximately three-fold enhancement of the output signal at the optimal spin polarization by optically pumping the thin vapor due to the same spin evolution behavior of the two different kinds of vapor atoms. Eventually, a measuring sensitivity of 30 fT/Hz1/2 was achieved combined with the homemade differential

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Mu, Jiliang, Zhang Qu, Zongmin Ma, et al. "Ensemble spin fabrication and manipulation of NV centres for magnetic sensing in diamond." Sensor Review 37, no. 4 (2017): 419–24. http://dx.doi.org/10.1108/sr-09-2016-0163.

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Purpose This study aims to fabricate and manipulate ensemble spin of negative nitrogen-vacancy (NV−) centres optimally for future solid atomic magnetometers/gyroscope. Parameters for sample preparation most related to magnetometers/gyroscope are, in particular, the concentration and homogeneity of the NV− centres, the parameters’ microwave antenna of resonance frequency and the strength of the microwave on NV− centres. Besides, the abundance of other impurities such as neutral NV centres (NV0) and substitutional nitrogen in the lattice also plays a critical role in magnetic sensing. Design/met

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31

Jain, Megha, Manju, Pargam Vashishtha, et al. "Mechanistic insights into defect generation and tuning of optical properties in Zn1−x Fe x Al2O4(0.01 ≤ x ≤ 0.40) nanocrystals." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 76, no. 5 (2020): 757–68. http://dx.doi.org/10.1107/s2052520620009130.

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The correlation of several defects and optical and magnetic properties with Fe content in Zn1−x Fe x Al2O4 (0.01 ≤ x ≤ 0.40) nanocrystals has been scrutinized through X-ray diffraction, O K-edge X-ray absorption near-edge structure, FT–IR, diffuse reflectance, photoluminescence and electron spin-resonance spectroscopies, and vibrating sample magnetometry. Increasing Fe content causes elongation in the octahedral units of the lattice, accompanied by distortion in the octahedral coordination. Fe introduces non-radiative centres in the forbidden gap, thereby tuning the band gap from 4.37 to 3.88

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Bennett, James S., Brian E. Vyhnalek, Hamish Greenall, et al. "Precision Magnetometers for Aerospace Applications: A Review." Sensors 21, no. 16 (2021): 5568. http://dx.doi.org/10.3390/s21165568.

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Aerospace technologies are crucial for modern civilization; space-based infrastructure underpins weather forecasting, communications, terrestrial navigation and logistics, planetary observations, solar monitoring, and other indispensable capabilities. Extraplanetary exploration—including orbital surveys and (more recently) roving, flying, or submersible unmanned vehicles—is also a key scientific and technological frontier, believed by many to be paramount to the long-term survival and prosperity of humanity. All of these aerospace applications require reliable control of the craft and the abil

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Jun-xiang ZHAO, 赵俊祥, 左冠华 Guan-hua ZUO, 李静 Jing LI, 张玉驰 Yu-chi ZHANG, 张鹏飞 Peng-fei ZHANG та 张天才 Tian-cai ZHANG. "基于腔增强的磁光旋转铯原子磁强计". Acta Sinica Quantum Optica 27, № 3 (2021): 192. http://dx.doi.org/10.3788/jqo20212703.0201.

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Zhang, Rui, Wei Xiao, Yudong Ding, et al. "Recording brain activities in unshielded Earth’s field with optically pumped atomic magnetometers." Science Advances 6, no. 24 (2020): eaba8792. http://dx.doi.org/10.1126/sciadv.aba8792.

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Understanding the relationship between brain activity and specific mental function is important for medical diagnosis of brain symptoms, such as epilepsy. Magnetoencephalography (MEG), which uses an array of high-sensitivity magnetometers to record magnetic field signals generated from neural currents occurring naturally in the brain, is a noninvasive method for locating the brain activities. The MEG is normally performed in a magnetically shielded room. Here, we introduce an unshielded MEG system based on optically pumped atomic magnetometers. We build an atomic magnetic gradiometer, together

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Li, Guozhu, Qing Xin, Xuxing Geng, et al. "Current sensor based on an atomic magnetometer for DC application." Chinese Optics Letters 18, no. 3 (2020): 031202. http://dx.doi.org/10.3788/col202018.031202.

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Akhmedzhanov, R. A., L. A. Gushchin, I. V. Zelensky, V. A. Nizov, N. A. Nizov, and D. A. Sobgaida. "Application of polycrystalline diamonds for magnetometry based on interactions of nonequivalently oriented groups of NV centres." Quantum Electronics 48, no. 10 (2018): 912–15. http://dx.doi.org/10.1070/qel16759.

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Yan, Yeguang, Jixi Lu, Binquan Zhou, et al. "Analysis and Correction of the Crosstalk Effect in a Three-Axis SERF Atomic Magnetometer." Photonics 9, no. 9 (2022): 654. http://dx.doi.org/10.3390/photonics9090654.

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Three-axis atomic magnetometers have an excellent advantage for determining the complete vector information of a magnetic field to be measured. However, the crosstalk effect, which leads to an error output on one axis owing to a magnetic field on the other axes, can reduce the measurement accuracy. In this study, we propose an effective suppression method for the crosstalk effect in a three-axis atomic magnetometer. First, we investigated and analyzed the main factors that introduce the effect. Based on this, the modulation parameters were optimized to improve the scale factors, which obtained

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Long, Dafeng, Xiaoming Zhang, Xiaohui Wei, Zhongliang Luo, and Jianzhong Cao. "A Fast Calibration and Compensation Method for Magnetometers in Strap-Down Spinning Projectiles." Sensors 18, no. 12 (2018): 4157. http://dx.doi.org/10.3390/s18124157.

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Attitude measurement is an essential technology in projectile trajectory correction. Magnetometers have been used for projectile attitude measurement systems as they are small in size, lightweight, and low cost. However, magnetometers are seriously disturbed by the artillery magnetic field during launch. Moreover, the error parameters of the magnetometers, which are calibrated in advance, usually change after extended storage. The changed parameters have negative effects on attitude estimation of the projectile. To improve the accuracy of attitude estimation, the magnetometers should be calibr

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Li Shu-Guang, Zhou Xiang, Cao Xiao-Chao, et al. "All-optical high sensitive atomic magnetometer." Acta Physica Sinica 59, no. 2 (2010): 877. http://dx.doi.org/10.7498/aps.59.877.

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Thormählen, Lars, Dennis Seidler, Viktor Schell, Frans Munnik, Jeffrey McCord, and Dirk Meyners. "Sputter Deposited Magnetostrictive Layers for SAW Magnetic Field Sensors." Sensors 21, no. 24 (2021): 8386. http://dx.doi.org/10.3390/s21248386.

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For the best possible limit of detection of any thin film-based magnetic field sensor, the functional magnetic film properties are an essential parameter. For sensors based on magnetostrictive layers, the chemical composition, morphology and intrinsic stresses of the layer have to be controlled during film deposition to further control magnetic influences such as crystallographic effects, pinning effects and stress anisotropies. For the application in magnetic surface acoustic wave sensors, the magnetostrictive layers are deposited on rotated piezoelectric single crystal substrates. The thermo

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Liu, Qiang, Yu Dan Sun, Qiang Huang, Xian Jin Zeng, Jun Hai Zhang, and Wei Min Sun. "Measurement of Linearly Polarized Light Rotation Applied in Atomic Magnetometer." Advanced Materials Research 753-755 (August 2013): 2149–52. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2149.

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The measurement of linearly polarized light rotation is the key technique in atomic magnetometer. It influences the sensitivity of atomic magnetometer directly. The basic principle of polarizer beam splitter detecting was analyzed. The ZF7 optical glass and solenoid were used to generate standard small angle based on Faraday effect. The signal of AC rotational angle was extracted by lock-in amplifier. The experiment proved that the method can measure 8×10-7rad small optical rotation. As the linearly polarized light rotation is 20mrad in atomic magnetometer, the signal to noise ratio reaches 25

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Hong, Hyun-Gue, Sang Eon Park, Sang-Bum Lee, et al. "Chip-Scale Ultra-Low Field Atomic Magnetometer Based on Coherent Population Trapping." Sensors 21, no. 4 (2021): 1517. http://dx.doi.org/10.3390/s21041517.

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We report a chip-scale atomic magnetometer based on coherent population trapping, which can operate near zero magnetic field. By exploiting the asymmetric population among magnetic sublevels in the hyperfine ground state of cesium, we observe that the resonance signal acquires sensitivity to magnetic field in spite of degeneracy. A dispersive signal for magnetic field discrimination is obtained near-zero-field as well as for finite fields (tens of micro-tesla) in a chip-scale device of 0.94 cm3 volume. This shows that it can be readily used in low magnetic field environments, which have been i

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Biryukov, Yaroslav P., Almaz L. Zinnatullin, Mikhail A. Cherosov, et al. "Low-temperature investigation of natural iron-rich oxoborates vonsenite and hulsite: thermal deformations of crystal structure, strong negative thermal expansion and cascades of magnetic transitions." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77, no. 6 (2021): 1021–34. http://dx.doi.org/10.1107/s2052520621010866.

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This work is devoted to an investigation of the magnetic properties and thermal behaviour of the natural oxoborates vonsenite and hulsite in the temperature range 5–500 K. The local environment, the oxidation states of the Fe and Sn atoms, and the charge distribution were determined using Mössbauer spectroscopy and are in accordance with a refinement of the crystal structure of hulsite from single-crystal X-ray diffraction data (SCXRD) in anisotropic approximation for the first time. The magnetic properties were studied by vibrating sample magnetometry (VSM) (5 ≤ T ≤ 400 K) and are reported fo

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Lu, Fei, Shuying Wang, Nuozhou Xu, Bo Li, Jixi Lu, and Bangcheng Han. "Analysis and Suppression of the Cross-Axis Coupling Effect for Dual-Beam SERF Atomic Magnetometer." Photonics 9, no. 11 (2022): 792. http://dx.doi.org/10.3390/photonics9110792.

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Spin-exchange relaxation-free (SERF) atomic magnetometers operated under a near-zero magnetic field are used for vector magnetic field measurements with high sensitivity. Previously, the cross-axis coupling error evoked by a nonzero background magnetic field has been verified to be adverse in modulated single-beam magnetometers. Here, in a dual-beam unmodulated SERF magnetometer, we propose a somewhat different solution model for the cross-axis coupling effect where the field of interest couples with the interference field. Considering two cases where the transverse or longitudinal background

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Rosner, M., D. Beck, P. Fierlinger, et al. "A highly drift-stable atomic magnetometer for fundamental physics experiments." Applied Physics Letters 120, no. 16 (2022): 161102. http://dx.doi.org/10.1063/5.0083854.

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We report the design and performance of a nonmagnetic drift stable optically pumped cesium magnetometer with a measured sensitivity of 35 fT at 200 s integration time and stability below 50 fT between 70 and 600 s. The sensor is based on the nonlinear magneto-optical rotation effect: in a Bell–Bloom configuration, a higher order polarization moment (alignment) of Cs atoms is created with a pump laser beam in an anti-relaxation coated Pyrex cell under vacuum, filled with Cs vapor at room temperature. The polarization plane of light passing through the cell is modulated due the precession of the

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Higbie, J. M., E. Corsini, and D. Budker. "Robust, high-speed, all-optical atomic magnetometer." Review of Scientific Instruments 77, no. 11 (2006): 113106. http://dx.doi.org/10.1063/1.2370597.

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Hutanu, Vladimir, Hao Deng, Sheng Ran, Wesley T. Fuhrman, Henrik Thoma, and Nicholas P. Butch. "Low-temperature crystal structure of the unconventional spin-triplet superconductor UTe2 from single-crystal neutron diffraction." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 76, no. 1 (2020): 137–43. http://dx.doi.org/10.1107/s2052520619016950.

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The crystal structure of a new superconductor UTe2 has been investigated using single-crystal neutron diffraction for the first time at the low temperature (LT) of 2.7 K, just above the superconducting transition temperature of ∼1.6 K, in order to clarify whether the orthorhombic structure of type Immm (No. 71), reported for the room-temperature (RT) structure persists down to the superconducting phase and can be considered as a parent symmetry for the development of spin-triplet superconductivity. In contrast to the previously reported phase transition at about 100 K [Stöwe (1996). J. Solid S

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Liu, Qiang, Yu Dan Sun, Yan Nan Zhuo, Jia Xing Wang, and Tian Shu Fu. "Influence of He Buffer Gas Pressure on Cs Atomic Polarizability." Applied Mechanics and Materials 475-476 (December 2013): 173–76. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.173.

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All optical cesium (Cs) atomic magnetometer with high sensitivity is an important technique to detect weak magnetic field. The Cs vapor cell is filled with He buffer gas to reduce spin relaxation rate. However the pressure of He also influences the Cs atomic polarizability due to pressure broadening effect. In this work, the principle of all optical Cs atomic magnetometer is analyzed. The rate equation is used to calculate Cs atomic polarizability as the pressure of He is about 100Torr and pure Cs vapor cell. The calculation shows that higher pressure of He buffer gas can decrease Cs atomic po

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Amorós-Binefa, Júlia, and Jan Kołodyński. "Noisy atomic magnetometry in real time." New Journal of Physics 23, no. 12 (2021): 123030. http://dx.doi.org/10.1088/1367-2630/ac3b71.

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Abstract Continuously monitored atomic spin-ensembles allow, in principle, for real-time sensing of external magnetic fields beyond classical limits. Within the linear-Gaussian regime, thanks to the phenomenon of measurement-induced spin-squeezing, they attain a quantum-enhanced scaling of sensitivity both as a function of time, t, and the number of atoms involved, N. In our work, we rigorously study how such conclusions based on Kalman filtering methods change when inevitable imperfections are taken into account: in the form of collective noise, as well as stochastic fluctuations of the field

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Wang, Bowen, Xiang Peng, Haidong Wang, Wei Xiao, and Hong Guo. "All-Optical Parametric-Resonance Magnetometer Based on 4He Atomic Alignment." Sensors 22, no. 11 (2022): 4184. http://dx.doi.org/10.3390/s22114184.

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Parametric-resonance magnetometer is a high-sensitivity quantum sensor characterized by applying the non-resonant radio-frequency (RF) fields to the atomic ensemble. The RF fields lead to crosstalk in the multi-sensor design, thus disturbing the magnetic-field measurement results. We propose an optically modulated alignment-based 4He parametric-resonance magnetometer. By using the fictitious field generated by the modulated light shift, parametric resonance is realized, and crosstalk caused by the magnetic RF field is prevented. The relative intensity noise of the lasers is suppressed to optim

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