6 papers
Fresnel zone plates for reconfigurable atomic waveguides
A. M. Pike, A. Dorne, L. Pickering +7
Fresnel zone plates (FZPs), with patterns of m resolution, allow the formation of clean, diffraction-limited foci -- but have a static phase profile. Spatial light modulator…
Field validation of GNSS-independent positioning enhancement using a wearable ultra-stable quantum magnetometer
Stirling Scholes, Dominic Hunter, Courtney Dyer +8
Increasing the resilience of positioning systems that currently rely on Global Navigation Satellite System (GNSS) signals can be achieved by incorporating stable and sensitive meas…
High-Resolution Atomic Magnetometer-Based Imaging of Integrated Circuits and Batteries
Dominic Hunter, Marcin S. Mrozowski, Stuart J. Ingleby +7
Optically pumped magnetometers (OPMs) have emerged as a powerful technique for high-resolution magnetic field imaging. However, achieving sub-millimeter spatial resolution at sub-p…
Rapid axial loading of a grating MOT with a cold-atom beam
Rachel Cannon, Aidan S. Arnold, Paul F. Griffin +2
Laser-cooled atoms are increasingly being used to realise practical quantum devices, motivating the development of compact and robust atom sources. Grating magneto-optical traps (g…
Intrinsic atomic calibration of oscillating magnetic fields in ULF and VLF bands
Zak Johnston, Paul F. Griffin, Erling Riis +3
We present a method for absolute calibration of received radio-frequency in the ultra low frequency (ULF), and very low frequency (VLF) range. This is achieved with the use of a ra…
Practical primary thermometry via alkali-metal-vapour Doppler broadening
Nicola Agnew, Veronika VohnÃková, Erling Riis +2
Doppler-broadening thermometry (DBT) can be used as a calibration-free primary reference suitable for practical applications, e.g. reliably measuring temperatures over long periods…