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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 1512–1519

Physical interpretation for the correlation spectra of electromagnetically-induced-transparency resonances

D. Felinto, L. S. Cruz, R. A. de Oliveira, H. M. Florez, M. H. G. de Miranda, P. Nussenzveig, M. Martinelli, and J. W. R. Tabosa  »View Author Affiliations


Optics Express, Vol. 21, Issue 2, pp. 1512-1519 (2013)
http://dx.doi.org/10.1364/OE.21.001512


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Abstract

The phenomenon called Electromagnetically Induced Transparency (EIT) may induce different types of correlation between two optical fields interacting with an ensemble of atoms. It is presently well known, for example, that in the vicinity of an EIT resonance the dominant correlations at low powers turn into anti-correlations as power increases. Such correlation spectra present striking power-broadening-independent features, with the best condition for measuring the characteristic linewidth occurring at the highest powers. In the present work we investigate the physical mechanisms responsible for this set of observations. Our approach is first to reproduce these effects in a better controlled experimental setup: a cold atomic ensemble, obtained from a magneto-optical trap. The results from this conceptually simpler system were then compared to a correspondingly simpler theory, which clearly relates the observed features to the interplay between two key aspects of EIT: the transparency itself and the steep normal dispersion near two-photon resonance.

© 2013 OSA

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(300.0300) Spectroscopy : Spectroscopy

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: November 29, 2012
Revised Manuscript: December 19, 2012
Manuscript Accepted: December 20, 2012
Published: January 14, 2013

Citation
D. Felinto, L. S. Cruz, R. A. de Oliveira, H. M. Florez, M. H. G. de Miranda, P. Nussenzveig, M. Martinelli, and J. W. R. Tabosa, "Physical interpretation for the correlation spectra of electromagnetically-induced-transparency resonances," Opt. Express 21, 1512-1519 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-2-1512


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