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Optics Letters

Optics Letters


  • Vol. 36, Iss. 16 — Aug. 15, 2011
  • pp: 3130–3132

Index of refraction engineering in five-level dressed interacting ground states atoms

Steven A. Sagona-Stophel, James Owen Weatherall, and Christopher P. Search  »View Author Affiliations

Optics Letters, Vol. 36, Issue 16, pp. 3130-3132 (2011)

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We present a five-level atomic system in which the index of refraction of a probe laser can be enhanced or reduced below unity with vanishing absorption in the region between pairs of absorption and gain lines formed by dressing of the atoms with a control laser and rf/microwave fields. By weak incoherent pumping of the population into a single metastable state, one can create several narrow amplifying resonances. At frequencies between these gain lines and additional absorption lines, there exist regions of vanishing absorption but resonantly enhanced index of refraction. In Rb vapors with density N in units of cm 3 , we predict an index of refraction up to n 1 + 1.2 × 10 14 N for the D1 line, which is more than an order of magnitude larger than other proposals for index of refraction enhancement. Furthermore, the index can be readily reduced below 1 by simply changing the sign of the probe or rf field detunings. This enhancement is robust with respect to homogeneous and inhomogeneous broadening.

© 2011 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(270.1670) Quantum optics : Coherent optical effects

ToC Category:
Atomic and Molecular Physics

Original Manuscript: March 16, 2011
Revised Manuscript: June 21, 2011
Manuscript Accepted: June 21, 2011
Published: August 10, 2011

Steven A. Sagona-Stophel, James Owen Weatherall, and Christopher P. Search, "Index of refraction engineering in five-level dressed interacting ground states atoms," Opt. Lett. 36, 3130-3132 (2011)

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