Realization of single optical frequency laser system for optically pumped cesium beam frequency standards
Sign Up to like & getrecommendations! Published in 2017 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-017-1232-z
Abstract: Compact laser system for optically pumped cesium beam clocks, which use single optical frequency laser for both Cs atomic state preparation and detection, is presented. The saturation probe laser intensity corresponding to certain Cs flux… read more here.
Keywords: laser; frequency; laser system; optically pumped ... See more keywords
Describing angular momentum conventions in circularly polarized optically pumped NMR in GaAs and CdTe.
Sign Up to like & getrecommendations! Published in 2021 at "Journal of magnetic resonance"
DOI: 10.1016/j.jmr.2021.106980
Abstract: The physical phenomena governing hyperpolarization through optical pumping of conduction electrons continue to be explored in multiple semiconductor systems. One early finding has been the asymmetry between the optically pumped nuclear magnetic resonance (OPNMR) signals… read more here.
Keywords: momentum conventions; describing angular; angular momentum; optically pumped ... See more keywords
On-scalp MEG system utilizing an actively shielded array of optically-pumped magnetometers
Sign Up to like & getrecommendations! Published in 2019 at "NeuroImage"
DOI: 10.1016/j.neuroimage.2019.03.022
Abstract: The spatial resolution of magnetoencephalography (MEG) can be increased from that of conventional SQUID-based systems by employing on-scalp sensor arrays of e.g. optically-pumped magnetometers (OPMs). However, OPMs reach sufficient sensitivity for neuromagnetic measurements only when… read more here.
Keywords: pumped magnetometers; system; field; scalp meg ... See more keywords
Imaging the human hippocampus with optically-pumped magnetoencephalography
Sign Up to like & getrecommendations! Published in 2019 at "Neuroimage"
DOI: 10.1016/j.neuroimage.2019.116192
Abstract: Optically-pumped (OP) magnetometers allow magnetoencephalography (MEG) to be performed while a participant’s head is unconstrained. To fully leverage this new technology, and in particular its capacity for mobility, the activity of deep brain structures which… read more here.
Keywords: hippocampus; human hippocampus; imaging human; hippocampus optically ... See more keywords
Detection of human auditory evoked brain signals with a resilient nonlinear optically pumped magnetometer
Sign Up to like & getrecommendations! Published in 2021 at "Neuroimage"
DOI: 10.1016/j.neuroimage.2020.117497
Abstract: Highlights • We have built and tested an Optically Pumped Magnetometer based on non-linear magnetooptical rotation.• We present a new approach to OPM- based MEG using a modular NOPM sensor.• Our sensor is resilient to… read more here.
Keywords: detection human; evoked brain; human auditory; pumped magnetometer ... See more keywords
Theoretical advantages of a triaxial optically pumped magnetometer magnetoencephalography system
Sign Up to like & getrecommendations! Published in 2021 at "NeuroImage"
DOI: 10.1016/j.neuroimage.2021.118025
Abstract: The optically pumped magnetometer (OPM) is a viable means to detect magnetic fields generated by human brain activity. Compared to conventional detectors (superconducting quantum interference devices) OPMs are small, lightweight, flexible, and operate without cryogenics.… read more here.
Keywords: system; pumped magnetometer; theoretical advantages; magnetoencephalography ... See more keywords
Modelling optically pumped magnetometer interference in MEG as a spatially homogeneous magnetic field
Sign Up to like & getrecommendations! Published in 2021 at "NeuroImage"
DOI: 10.1016/j.neuroimage.2021.118484
Abstract: Here we propose that much of the magnetic interference observed when using optically pumped magnetometers for MEG experiments can be modeled as a spatially homogeneous magnetic field. We show that this approximation reduces sensor level… read more here.
Keywords: field; interference; optically pumped; homogeneous magnetic ... See more keywords
Power Balance and Temperature in Optically Pumped Spasers and Nanolasers
Sign Up to like & getrecommendations! Published in 2018 at "ACS Photonics"
DOI: 10.1021/acsphotonics.8b00705
Abstract: Spasers and nanolasers produce a significant amount of heat, which impedes their realizability. We numerically investigate the farfield emission and thermal load in optically pumped spasers with a coupled electromagnetic/thermal model, including additional temperature discontinuities… read more here.
Keywords: temperature; spasers nanolasers; power; pumped spasers ... See more keywords
Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity
Sign Up to like & getrecommendations! Published in 2020 at "Nature Communications"
DOI: 10.1038/s41467-019-14014-3
Abstract: Realization of electrically pumped lasing with solution processable materials will have a revolutionary impact on many disciplines including photonics, chemical sensing, and medical diagnostics. Due to readily tunable, size-controlled emission wavelengths, colloidal semiconductor quantum dots (QDs)… read more here.
Keywords: electrically pumped; colloidal quantum; optically pumped; quantum dot ... See more keywords
Magnetocardiography on an isolated animal heart with a room-temperature optically pumped magnetometer
Sign Up to like & getrecommendations! Published in 2018 at "Scientific Reports"
DOI: 10.1038/s41598-018-34535-z
Abstract: Optically pumped magnetometers are becoming a promising alternative to cryogenically-cooled superconducting magnetometers for detecting and imaging biomagnetic fields. Magnetic field detection is a completely non-invasive method, which allows one to study the function of excitable… read more here.
Keywords: heart; temperature; pumped magnetometer; room ... See more keywords
Characterization of noise sources in a microfabricated single-beam zero-field optically-pumped magnetometer.
Sign Up to like & getrecommendations! Published in 2019 at "Journal of applied physics"
DOI: 10.1063/1.5098088
Abstract: We present an experimental noise characterization of a miniature single-beam absorption-based optically-pumped magnetometer with a noise floor of 7 fT/Hz1/2 operating in the spin-exchange relaxation-free regime. We experimentally evaluate noise arising from the laser intensity, laser… read more here.
Keywords: noise sources; field; pumped magnetometer; noise ... See more keywords