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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 19 — Oct. 1, 2013
  • pp: 3811–3814

Atomic wave-packet dynamics and third-harmonic generation in sodium

Hrvoje Skenderović and Silvije Vdović  »View Author Affiliations


Optics Letters, Vol. 38, Issue 19, pp. 3811-3814 (2013)
http://dx.doi.org/10.1364/OL.38.003811


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Abstract

In femtosecond degenerate four-wave mixing experiments in sodium vapor, quantum beats are observed at the wavelength of the third harmonic when the fundamental beams are three-photon resonant. The period of beating, which corresponds to fine structure energy-level splitting, does not change with the atomic number density, buffer gas pressure, or laser intensity. Surprisingly, the third-harmonic signal is observed only at negative time delays for the transient grating pulse sequence. We relate this to the well-known interference effect between excitation pathways involving the fundamental and the third-harmonic fields, which leaves atoms virtually unexcited and prevents formation of population grating.

© 2013 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Nonlinear Optics

History
Original Manuscript: July 8, 2013
Revised Manuscript: August 28, 2013
Manuscript Accepted: August 30, 2013
Published: September 23, 2013

Citation
Hrvoje Skenderović and Silvije Vdović, "Atomic wave-packet dynamics and third-harmonic generation in sodium," Opt. Lett. 38, 3811-3814 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-19-3811

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