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Optics Letters

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  • Vol. 26, Iss. 8 — Apr. 15, 2001
  • pp: 548–550

Nonlinear absorption by quantum interference in cold atoms

Min Yan, Edward G. Rickey, and Yifu Zhu  »View Author Affiliations


Optics Letters, Vol. 26, Issue 8, pp. 548-550 (2001)
http://dx.doi.org/10.1364/OL.26.000548


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Abstract

We report an experimental observation of third-order nonlinear absorption by quantum interference in 87Rb atoms cooled and confined in a magneto-optic trap. A coupling laser creates electromagnetically induced transparency (EIT) in a multilevel Rb system in which the third-order nonlinear absorption is enhanced by constructive quantum interference while the linear absorption is inhibited by destructive interference. Our experiment demonstrates the EIT system proposed by Harris and Yamamoto [Phys. Rev. Lett. 81, 3611 (1998)], which absorbs two photons but not one photon in the dressed-state picture.

© 2001 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(270.1670) Quantum optics : Coherent optical effects
(270.4180) Quantum optics : Multiphoton processes

Citation
Min Yan, Edward G. Rickey, and Yifu Zhu, "Nonlinear absorption by quantum interference in cold atoms," Opt. Lett. 26, 548-550 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-8-548


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