Publication

A cold-atom Ramsey clock with a low volume physics package
Scientific Reports 14, (2024)
We demonstrate a Ramsey-type microwave clock interrogating the 6.835 GHz ground-state transition in cold 87Rb atoms loaded from a …
A. Bregazzi, E. Batori, B. Lewis, C. Affolderbach, G. Mileti, E. Riis, P. Griffin
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Single-board low-noise fluxgate magnetometer
Journal of Applied Physics 135, (2024)
Low-noise fluxgate magnetometers are normally comprised of three separate devices: a power supply, the sensor head/electronics and an …
T. Dyer, P. Griffin, E. Riis
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Advancing the stability and accuracy of a laser-cooled microwave atomic clock
The atomic clock team are looking to develop ultra-compact platforms to provide atomic timing and frequency references. The team have an experimental position to develop compact and robust laser-cooled atomic clocks with a fractional accuracy on the level of 10-15, equvalent to a timing accuracy on the scale of a nanosecond in a week, for research, industry, and space applications
Nov 1, 2023
Advancing the stability and accuracy of a laser-cooled microwave atomic clock
Optimal binary gratings for multi-wavelength magneto-optical traps
Optics Express 31, 40871–40880 (2023)
Grating magneto-optical traps are an enabling quantum technology for portable metrological devices with ultracold atoms. However, beam …
O. S. Burrow, R. J. Fasano, W. Brand, M. W. Wright, W. Li, A. D. Ludlow, E. Riis, P. F. Griffin, A. S. Arnold
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Portable single-beam cesium zero-field magnetometer for magnetocardiography
Journal of Optical Microsystems 3, (2023)
Optically pumped magnetometers (OPMs) are becoming common in the realm of biomagnetic measurements. We discuss the development of a …
R. Dawson, C. O'Dwyer, M. S. Mrozowski, E. Irwin, J. P. McGilligan, D. P. Burt, D. Hunter, S. Ingleby, M. Rea, N. Holmes, M. J. Brookes, P. F. Griffin, E. Riis
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Free-induction-decay magnetic field imaging with a microfabricated Cs vapor cell
Optics Express 31, 33582–33595 (2023)
Magnetic field imaging is a valuable resource for signal source localization and characterization. This work reports an optically …
D. Hunter, C. Perrella, A. McWilliam, J. P. McGilligan, M. Mrozowski, S. J. Ingleby, P. F. Griffin, D. Burt, A. N. Luiten, E. Riis
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Optical pumping enhancement of a free-induction-decay magnetometer
Journal of Optical Society of America B 40, 2664–2673 (2023)
Spin preparation prior to a free-induction-decay (FID) measurement can be adversely affected by transverse bias fields, particularly in …
D. Hunter, M. S. Mrozowski, A. McWilliam, S. J. Ingleby, T. E. Dyer, P. F. Griffin, E. Riis
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Nitrogen buffer gas pressure tuning in a micro-machined vapor cell
Applied Physics Letters 123, (2023)
We demonstrate a controllable depletion of the nitrogen buffer gas pressure in a micro-machined cesium (Cs) vapor cell from the dynamic …
S. Dyer, A. McWilliam, D. Hunter, S. Ingleby, D. P. Burt, O. Sharp, F. Mirando, P. F. Griffin, E. Riis, J. P. McGilligan
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Silicon-nitride photonic integrated circuits for atomic systems: 2023 IEEE Photonics Society Summer Topicals Meeting Series, SUM 2023
2023 IEEE Photonics Society Summer Topicals Meeting Series (SUM) (2023)
We present the development of a silicon-nitride photonic integrated circuit platform aimed at a range of miniature atomic systems …
K. Gallacher, E. Di Gaetano, S. Dyer, B. Kelliehor, J. P. McGilligan, M. Sinclair, U. Hawley, A. S. Arnold, P. F. Griffin, M. Sorel, E. Riis, D. J. Paul
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An additive-manufactured microwave cavity for a compact cold-atom clock
Journal of Applied Physics 133, 224401 (2023)
We present an additive-manufactured microwave cavity for a Ramsey-type, double resonance, compact cold-atom clock. Atoms can be laser …
E. Batori, A. Bregazzi, B. Lewis, P. F. Griffin, E. Riis, G. Mileti, C. Affolderbach
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