Optically-pumped magnetometers

Optically-pumped magnetometers (OPMs) use optical methods to spin-polarise an atomic medium and detect its coherent response to a magnetic field. OPMs surpass the sensitivity of superconducting sensors, while also working without cryogenics, making them potentially disruptive in the biomagnetic applications of magnetoencephalography (MEG) and magneto-cardiography (MCG). Deploying OPMs in these applications requires them to be simultaneously sensitive, fast, with large dynamic range, close packable, manufacturable, and reliable in large numbers.

Objective: In macQsimal, partners will work closely together for the design, development, and validation of Compact Optically Pumped Magnetometers (OPM) for lowfrequency and radio-frequency magnetic fields for biomagnetic scientific and medical applications.

Related macQsimal publications and presentations

Sub-pT optical magnetometry with squeezed light
The Institute of Photonic Sciences (ICFO), 2020, micro-WOPM 2020, online.

Magnetic field modeling with surface currents. Part II. Implementation and usage of bfieldtools
Zettera, R., Mäkinen, A.J., Iivanainen, J., Zevenhoven, K.C.J., Ilmoniemi, R.J., Parkkonen, L. (2020) Journal of Applied Physics, 128(6), 10897550. A preprint of this publication is available on arXiv.

Magnetic-field modeling with surface currents. Part I. Physical and computational principles of bfieldtools
Mäkinena, A.J., Zetter, R., Iivanainen, J., Zevenhoven, K.C.J., Parkkonen, L., Ilmoniemi, R.J. (2020) Journal of Applied Physics, 128(6), 063906. A preprint of this publication is available on arXiv.

Scale-invariant spin dynamics and the quantum limits of field sensing
Mitchell, M.W. (2020) New Journal of Physics, 22(5), 053041.
A preprint of this publication is available on arXiv.

Measurement-induced, spatially-extended entanglement in a hot, strongly-interacting atomic system
Kong, J., Jiménez-Martínez, R., Troullinou, C., Lucivero, V., Tóth, G., Mitchell, M.W. (2020) Nature Communications, 11(1), 2415.

Quantum limits to the energy resolution of magnetic field sensors
Mitchell, M.W., Palacios Álvarez, S. (2020) Reviews of Modern Physics, 92(2), 021001.
A preprint of this publication is available on arXiv.

Detection of low-conductivity objects using eddy current measurements with an optical magnetometer
Jensen, K., Zugenmaier, M., Arnbak, J., Stærkind, H., Balabas, M.V., Polzik, E.S. (2019) Physical Review Research, 1(3), 033087.