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Journal Article

Giant Kerr effect in closed degenerate two-level transitions

MPS-Authors

Spani Molella,  L.
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Rinkleff,  Rolf-Hermann
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Kühn,  Gerrit
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Danzmann,  Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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ApplPhysB90_273.pdf
(Publisher version), 475KB

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Citation

Spani Molella, L., Rinkleff, R.-H., Kühn, G., & Danzmann, K. (2008). Giant Kerr effect in closed degenerate two-level transitions. Applied Physics B, 90(2), 273-277. doi:10.1007/s00340-007-2824-2.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-624A-A
Abstract
Extremely large optical Kerr non-linearities (n2) and (n4) were measured in two closed degenerate two-level transitions in the caesium D2 line when a probe and a coupling laser simultaneously probed and coupled the hyperfine structure in an atomic beam. The magnitude of the measured non-linearities in both transitions were found to be a function of the coupling laser intensity and of the probe detuning from the two-photon resonance. In a figure of merit, the ratio between the non-unitarian part of the refractive index and the absorption coefficient measured in conditions of electromagnetically induced transparency showed a maximum value for a probe detuning of 160 kHz from the two-photon resonance and resulted in being 105 times larger than in the absence of the coupling laser field.