Suppression of spin-exchange relaxation using pulsed parametric resonance.
We demonstrate that spin-exchange dephasing of Larmor precession at near-Earth-scale fields is effectively eliminated by dressing the alkali-metal atom spins in a sequence of ac-coupled 2π pulses, repeated at the Larmor precession frequency. The contribution of spin-exchange collisions to the spectroscopic linewidth is reduced by a factor of the duty cycle of the pulses. We experimentally demonstrate resonant transverse pumping in magnetic fields as high as 0.1 G, present experimental measurements of the suppressed spin-exchange relaxation, and show enhanced magnetometer response relative to a light-narrowed scalar magnetometer.
Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
A
A
Korver
R
R
Wyllie
B
B
Lancor
T G
TG
Walker
D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D008280:Magnetics; D060306:Magnetometry / Q000379:methods*; D008672:Metals, Alkali / Q000737:chemistry*
D008672:Metals, Alkali