A M Akulshin et al 2003 J. Opt. B: Quantum Semiclass. Opt. 5 S479 doi:10.1088/1464-4266/5/4/353
Highly nonlinear atomic medium with steep and sign-reversible dispersion*
A M Akulshin1, A Cimmino1, A I Sidorov2, R McLean2 and P Hannaford2
Show affiliationsExperimental investigation of the optical properties of atomic media with bright and dark long-lived light-induced Zeeman coherence is reported. We have obtained a small negative value for the group velocity of light pulses in Cs vapour (Vg 
−c/6000), which agrees with direct anomalous dispersion measurements. The intensity dependent components of the refractive index of an atomic vapour with long-lived Zeeman coherence has been estimated. We have shown that such coherence can significantly enhance four-wave mixing, leading to the appearance of a multi-frequency comb-like spectrum at relatively low light intensity.
- PACS
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32.60.+i Zeeman and Stark effects
42.50.Dv Quantum state engineering and measurements
42.65.Hw Phase conjugation; photorefractive and Kerr effects
51.70.+f Optical and dielectric properties
32.80.Qk Coherent control of atomic interactions with photons
- Subjects
- Dates
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Issue 4 (August 2003)
Received 4 February 2003, accepted for publication 8 April 2003
Published 6 August 2003
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Highly nonlinear atomic medium with steep and sign-reversible dispersion*
A M Akulshin et al 2003 J. Opt. B: Quantum Semiclass. Opt. 5 S479
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