Spatially resolved magnetometry using cold atoms in dark optical tweezers.
We use Faraday spectroscopy of atoms confined to crossed hollow beam tweezers to map magnetic fields over 3 millimeters with 200 micron resolution in a single trap loading cycle. The hollow beams are formed using spatial light modulation, and the trap location is scanned using acousto-optic deflectors. We demonstrate the technique by mapping a linear quadrupole magnetic field with 10 nT sensitivity.
Fatemi
Fredrik K
FK
Optical Sciences Division, Naval Research Laboratory, Washington, DC 20375, USA. *fatemi@ccs.nrl.navy.mil
Bashkansky
Mark
M