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Opt Express. 2010 Dec 20;18(26):27167-72. doi: 10.1364/OE.18.027167.

Femtotesla atomic magnetometry in a microfabricated vapor cell.

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Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.


We describe an optically pumped 87Rb magnetometer with 5 fT/Hz(1/2) sensitivity when operated in the spin-exchange relaxation free (SERF) regime. The magnetometer uses a microfabricated vapor cell consisting of a cavity etched in a 1 mm thick silicon wafer with anodically bonded Pyrex windows. The measurement volume of the magnetometer is 1 mm3, defined by the overlap region of a circularly polarized pump laser and a linearly polarized probe laser, both operated near 795 nm. Sensitivity limitations unique to the use of microfabricated cells are discussed.

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