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Lampis A, Culver R, Megyeri B, et al. Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor. Opt Express. 2016;24(14):15494-505doi: 10.1364/OE.24.015494.
Lampis, A., Culver, R., Megyeri, B., & Goldwin, J. (2016). Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor. Optics express, 24(14), 15494-505. https://doi.org/10.1364/OE.24.015494
Lampis, Andreas, et al. "Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor." Optics express vol. 24,14 (2016): 15494-505. doi: https://doi.org/10.1364/OE.24.015494
Lampis A, Culver R, Megyeri B, Goldwin J. Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor. Opt Express. 2016 Jul 11;24(14):15494-505. doi: 10.1364/OE.24.015494. PMID: 27410824.
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Opt Express. 2016 Jul 11;24(14):15494-505. doi: 10.1364/OE.24.015494.

Coherent control of group index and magneto-optical anisotropy in a multilevel atomic vapor.

Optics express

Andreas Lampis, Robert Culver, Balázs Megyeri, Jon Goldwin

PMID: 27410824 DOI: 10.1364/OE.24.015494

Abstract

We study electromagnetically induced transparency (EIT) in a heated potassium vapor cell, using a simple optical setup with a single free-running diode laser and an acousto-optic modulator. Despite the fact that the Doppler width is comparable to the ground state hyperfine splitting, transparency windows with deeply sub-natural line widths and large group indices are obtained. A longitudinal magnetic field is used to split the EIT feature and induce magneto-optical anisotropy. Using the beat note between co-propagating coupling and probe beams, we perform a heterodyne measurement of the circular dichroism (and therefore birefringence) of the EIT medium. The observed spectra reveal that lin‖lin polarizations lead to greater anisotropy than lin⊥lin. A simplified ‖analytical model encompassing sixteen Zeeman states and eighteen Λ subsytems reproduces the experimental observations.

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