Results 91 to 100 of about 96,670 (200)

A plateau in the sensitivity of a compact optically pumped atomic magnetometer

AIP Advances, 2014
In a compact optically pumped atomic magnetometer (OPAM), there is a plateau in the sensitivity where the dependence of the sensitivity on pumping power is small compared with that predicted by the uniform polarization model. The mechanism that generates
Natsuhiko Mizutani, Kazuhisa Okano, Kazuhiro Ban, Sunao Ichihara, Akira Terao, Tetsuo Kobayashi   +5 more
doaj   +1 more source

Altered Evening Aperiodic Activity and Microstate Dynamics in Insomnia Disorder: An OPM MEG Study

CNS Neuroscience &Therapeutics, Volume 32, Issue 8, August 2026.
Using wearable OPM‐MEG, this study characterized evening and morning resting state neurophysiology in insomnia disorder. A flatter evening aperiodic spectral exponent suggested relatively elevated cortical excitability, alongside altered microstate dynamics involving putative limbic and sensorimotor network states.
Feng Cui, Kejia Hu, Hui Zeng, Yang Wang, Xi Wang, Haiting Liu, Tangfen Wang, Yan Chang, Xiaodong Yang, Tao Hu, Tianxiao Shen, Jianbing Zhu, Jian Zheng, Donghua Pan   +13 more
wiley   +1 more source

The Evolution of Semiconductor Devices: From Transistors to Quantum and Neuromorphic Computing

physica status solidi (RRL) – Rapid Research Letters, Volume 20, Issue 8, August 2026.
This review presents the evolution of semiconductor devices from BJTs to fin field‐effect transistors (FinFETs), nanowire, and carbon nanotube transistors. It highlights emerging materials, including SiC and GaN, and examines neuromorphic and quantum computing, industry applications, performance benchmarks, challenges, and future directions.
Manoharan Subramanian, Mahalakshmi Balan, Ananthi Kaliyamoorthy, Esakki Muthu Sankaran, Govindaraj Vellingiri, Gianluca Gatto, Amit Kumar   +6 more
wiley   +1 more source

Facial magnetomyography using an array of optically pumped magnetometer

Laryngo-Rhino-Otologie
Measuring facial muscle activity is crucial in the diagnosis of facial palsy. This study investigated whether contactless Magnetomyography (MMG) using optically pumped magnetometers (OPM) is feasible for visualizing facial muscle activity.An anatomically shaped mask featuring eleven OPM was arranged on one side of the face of five healthy subjects. MMG
von Fraunberg, Johannes, Lu, Hongyu, Yang, Haodi, Marquetand, Nura, Braun, Christoph, Rüttiger, Lukas, Wolpert, Stephan, Knipper, Marlies, Siegel, Markus, Löwenheim, Hubert, Marquetand, Justus   +10 more
openaire   +2 more sources

Four-channel optically pumped atomic magnetometer for magnetoencephalography

Optics Express, 2016
We have developed a four-channel optically pumped atomic magnetometer for magnetoencephalography (MEG) that incorporates a passive diffractive optical element (DOE). The DOE allows us to achieve a long, 18-mm gradiometer baseline in a compact footprint on the head.
Anthony P, Colombo, Tony R, Carter, Amir, Borna, Yuan-Yu, Jau, Cort N, Johnson, Amber L, Dagel, Peter D D, Schwindt   +6 more
openaire   +2 more sources

Sub‐Ensemble Isolation in SERF Magnetometry Enabled by Micrometer‐Scale Polarization Control

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
Inter‐channel crosstalk caused by atomic diffusion fundamentally limits the spatial resolution of single‐cell multi‐channel SERF magnetometers. In this work, a spatial‐variant polarization metasurface is employed to achieve effective sub‐ensemble isolation within a single SERF atomic ensemble, which enables the suppression of inter‐channel crosstalk ...
Yuhao Zhang, Zihua Liang, Lu Liu, Jinsheng Hu, Peng Zhou, Gen Hu, Gaopu Hou, Mao Ye   +7 more
wiley   +1 more source

Detection of Fetal Arrhythmia by Using Optically Pumped Magnetometers

JACC: Clinical Electrophysiology, 2018
Fetal magnetocardiography (fMCG) is an emerging technology that has provided invaluable insight into the mechanisms of fetal arrhythmia. Its efficacy for diagnosis and management of serious fetal arrhythmia has been acknowledged in the recent American Heart Association Statement on Diagnosis ...
Margo, Batie, Sarah, Bitant, Janette F, Strasburger, Vishal, Shah, Orang, Alem, Ronald T, Wakai   +5 more
openaire   +2 more sources

Measuring Human Auditory Evoked Fields with a Flexible Multi-Channel OPM-Based MEG System

Journal of Integrative Neuroscience
Background: Magnetoencephalography (MEG) is a non-invasive imaging technique for directly measuring the external magnetic field generated from synchronously activated pyramidal neurons in the brain.
Xin Zhang, Yan Chang, Hui Wang, Yin Zhang, Tao Hu, Xiao-yu Feng, Ming-kang Zhang, Ze-kun Yao, Chun-qiao Chen, Jia-yu Xu, Fang-yue Fu, Qing-qian Guo, Jian-bing Zhu, Hai-qun Xie, Xiao-dong Yang   +14 more
doaj   +1 more source

Beyond sensitivity: what are the enabling opportunities of OPM-MEG?

Frontiers in Medical Technology
While optically-pumped magnetometer (OPM) technology offers a number of compelling advantages over its SQUID predecessor for magnetoencephalography (MEG), many studies and viewpoints focus on issues of (i) scalp placement, with commensurate increases in ...
Timothy P. L. Roberts, Timothy P. L. Roberts, Charlotte Birnbaum, Luke Bloy, William Gaetz, William Gaetz   +5 more
doaj   +1 more source

Attitude-Independent Route Tracking for Subsea Power Cables Using a Scalar Magnetometer under High Sea Conditions

Remote Sensing
To overcome the shortcoming wherein the accuracy of subsea cable detection can be affected by the determination of the bias vector, scale factors, and non-orthogonality corrections of the vector magnetometer, a real-time attitude-independent route ...
Guozhu Li, Xuxing Geng, Shangqing Liang, Yuanpeng Chen, Guangming Huang, Gaoxiang Li, Xueting Zhang, Guoqing Yang   +7 more
doaj   +1 more source