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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 11 — May. 28, 2007
  • pp: 7006–7018

Negative nonlinear refraction obtained with ultrashort laser pulses

Chen-Wei Chen, Jaw-Luen Tang, Kuo-Hsiang Chung, Tai-Huei Wei, and Tzer-Hsiang Huang  »View Author Affiliations

Optics Express, Vol. 15, Issue 11, pp. 7006-7018 (2007)

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We present nonlinear refraction results for liquids methanol and acetic acid obtained with the Z-scan technique and 28 femtosecond (fs) 800 nm laser pulses. In contrast to the positive lensing effect obtained previously with picosecond and nanosecond laser pulses, a negative lensing effect is observed. The associated mechanism features the third-order polarization arising from the nonlinear response of the molecular skeletal motion that is driven into resonance through its electrostatic coupling to the valence electron cloud distorted by the fs laser field.

© 2007 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.3270) Nonlinear optics : Kerr effect
(300.0300) Spectroscopy : Spectroscopy
(320.2250) Ultrafast optics : Femtosecond phenomena

ToC Category:
Nonlinear Optics

Original Manuscript: July 21, 2006
Revised Manuscript: November 9, 2006
Manuscript Accepted: November 9, 2006
Published: May 24, 2007

Chen-Wei Chen, Jaw-Luen Tang, Kuo-Hsiang Chung, Tai-Huei Wei, and Tzer-Hsiang Huang, "Negative nonlinear refraction obtained with ultrashort laser pulses," Opt. Express 15, 7006-7018 (2007)

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