Linear and nonlinear magneto-optical rotation on the narrow strontium intercombination line

Abstract

In the presence of an external static magnetic field, an atomic gas becomes optically active, showing magneto-optical rotation. In the saturated regime, the coherences among the excited substates give a nonlinear contribution to the rotation of the light polarization. In contrast with the linear magneto-optical rotation, the nonlinear counterpart is insensitive to Doppler broadening. By varying the temperature of a cold strontium gas, we observe both regimes by driving the $J=0\to J=1$ transition on the intercombination line. For this narrow transition, the sensitivity to the static magnetic field is typically three orders of magnitude larger than for a standard broad alkali transition.

References in corpus (12)

• Resonant nonlinear magneto-optical effects in atoms
• Squeezed-Light Optical Magnetometry
• Quantum limit of optical magnetometry in the presence of ac-Stark shifts
• High-resolution hyperfine spectroscopy of excited states using electromagnetically-induced transparency
• Large Faraday rotation of resonant light in a cold atomic cloud
• Subnatural linewidth using electromagnetically induced transparency in Doppler-broadened vapor
• Enhancement of Magneto-Optic Effects via Large Atomic Coherence
• A high flux source of cold strontium atoms
• The Hilbert transform: Applications to atomic spectra
• Nonlinear Faraday Rotation and Superposition-State Detection in Cold Atoms
• Cavity enhanced atomic magnetometry
• Multiple scattering of light in cold atomic clouds with a magnetic field

Cited by in corpus (4)

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• Bi-color atomic beam slower and magnetic field compensation for ultracold gases
• Nature of interference between Autler-Townes peaks in multi-level system
• Anisotropic long-range interaction investigated with cold atoms