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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 20, Iss. 4 — Apr. 1, 2003
  • pp: 764–769

Nonperturbative transient four-wave-mixing line shapes due to excitation-induced shift and excitation-induced dephasing

J. M. Shacklette and S. T. Cundiff  »View Author Affiliations


JOSA B, Vol. 20, Issue 4, pp. 764-769 (2003)
http://dx.doi.org/10.1364/JOSAB.20.000764


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Abstract

We numerically calculate the transient-four-wave-mixing (TFWM) response in systems that exhibit either a resonance frequency or a dephasing rate that depends on the level of excitation, which can occur in semiconductors or a dense atomic vapor. These effects change the intensity dependence of the TFWM signal, causing it to display noncubic behavior for significantly lower pulse areas and even a reduction in signal intensity for increasing pulse area. They also qualitatively change both the temporal behavior and spectrum of the TFWM signal in ways that cannot adequately be described in perturbation theory. For time-integrated TFWM, the saturation behavior is also found to depend on the delay between pulses. For comparison, the effects of local fields are also calculated as they produce similar effects. These results can help provide discrimination among the various phenomena.

© 2003 Optical Society of America

OCIS Codes
(300.6290) Spectroscopy : Spectroscopy, four-wave mixing
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
(320.7150) Ultrafast optics : Ultrafast spectroscopy

Citation
J. M. Shacklette and S. T. Cundiff, "Nonperturbative transient four-wave-mixing line shapes due to excitation-induced shift and excitation-induced dephasing," J. Opt. Soc. Am. B 20, 764-769 (2003)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-4-764

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