TY - JOUR
T1 - Functionalized millimeter-scale vapor cells for alkali-metal spectroscopy and magnetometry
AU - Raghavan, Harini
AU - Tayler, Michael C.D.
AU - Mouloudakis, Kostas
AU - Rae, Rachel
AU - Lähteenmäki, Sami
AU - Zetter, Rasmus
AU - Laine, Petteri
AU - Haesler, Jacques
AU - Balet, Laurent
AU - Overstolz, Thomas
AU - Karlen, Sylvain
AU - Mitchell, Morgan W.
N1 - Publisher Copyright:
© 2024 American Physical Society.
PY - 2024/10
Y1 - 2024/10
N2 - We describe microfabricated rubidium vapor cells with integrated temperature-control functionality and demonstrate their suitability for use in miniaturized ultrasensitive magnetometers. These functionalized vapor cells (FVCs) embody a dual-chamber design in low-conductivity silicon with antipermeation coatings and microstructured thin-film platinum surface traces as resistive heaters and temperature sensors. Thermal tests show our ability to control alkali-metal distribution within the FVCs, ensuring a clean sensing chamber for optical measurements. Optical-absorption spectroscopy is used to correlate the temperature readings with vapor density and to measure buffer-gas pressure, of interest for optimizing sensitivity. Finally, we demonstrate zero-field resonance magnetometry with 18fT/Hz sensitivity in the 10- to 100-Hz band, limited by laser noise and magnetic shield noise, which indicates that the functionalization does not introduce significant magnetic noise.
AB - We describe microfabricated rubidium vapor cells with integrated temperature-control functionality and demonstrate their suitability for use in miniaturized ultrasensitive magnetometers. These functionalized vapor cells (FVCs) embody a dual-chamber design in low-conductivity silicon with antipermeation coatings and microstructured thin-film platinum surface traces as resistive heaters and temperature sensors. Thermal tests show our ability to control alkali-metal distribution within the FVCs, ensuring a clean sensing chamber for optical measurements. Optical-absorption spectroscopy is used to correlate the temperature readings with vapor density and to measure buffer-gas pressure, of interest for optimizing sensitivity. Finally, we demonstrate zero-field resonance magnetometry with 18fT/Hz sensitivity in the 10- to 100-Hz band, limited by laser noise and magnetic shield noise, which indicates that the functionalization does not introduce significant magnetic noise.
UR - http://www.scopus.com/inward/record.url?scp=85207429538&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.22.044011
DO - 10.1103/PhysRevApplied.22.044011
M3 - Article
AN - SCOPUS:85207429538
SN - 2331-7019
VL - 22
JO - Physical Review Applied
JF - Physical Review Applied
IS - 4
M1 - 044011
ER -