Cavity enhanced atomic magnetometry.
Atom sensing based on Faraday rotation is an indispensable method for precision measurements, universally suitable for both hot and cold atomic systems. Here we demonstrate an all-optical magnetometer where the optical cell for Faraday rotation spectroscopy is augmented with a low finesse cavity. Unlike in previous experiments, where specifically designed multipass cells had been employed, our scheme allows to use conventional, spherical vapour cells. Spherical shaped cells have the advantage that they can be effectively coated inside with a spin relaxation suppressing layer providing long spin coherence times without addition of a buffer gas. Cavity enhancement shows in an increase in optical polarization rotation and sensitivity compared to single-pass configurations.
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543.|Division of Physics and Applied Physics, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Herbert
H
Crepaz
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543.|Division of Physics and Applied Physics, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Li Yuan
LY
Ley
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543.|Division of Physics and Applied Physics, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Rainer
R
Dumke