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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 4 — Feb. 19, 2007
  • pp: 1718–1731

Z-scan study of thermal nonlinearities in silicon naphthalocyanine-toluene solution with the excitations of the picosecond pulse train and nanosecond pulse

Sidney S. Yang, Tai-Huei Wei, Tzer-Hsiang Huang, and Yun-Ching Chang  »View Author Affiliations

Optics Express, Vol. 15, Issue 4, pp. 1718-1731 (2007)

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Using the Z-scan technique, we studied the nonlinear absorption and refraction behaviors of a dilute toluene solution of a silicon naphthalocyanine (Si(OSi(n-hexyl)3)2, SiNc) at 532 nanometer with both a 2.8-nanosecond pulse and a 21-nanosecond (HW1/eM) pulse train containing 11 18-picosecond pulses 7 nanosecond apart. A thermal acoustic model and its steady-state approximation account for the heat generated by the nonradiative relaxations subsequent to the absorption. We found that when the steady-state approximation satisfactorily explained the results obtained with a 21-nanosecond pulse train, only the thermal-acoustic model fit the 2.8-nanosecond experimental results, which supports the approximation criterion established by Kovsh et al.

© 2007 Optical Society of America

OCIS Codes
(000.6850) General : Thermodynamics
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.4870) Nonlinear optics : Photothermal effects

ToC Category:
Nonlinear Optics

Original Manuscript: November 21, 2006
Revised Manuscript: January 26, 2007
Manuscript Accepted: January 29, 2007
Published: February 19, 2007

Sidney S. Yang, Tai-Huei Wei, Tzer-Hsiang Huang, and Yun-Ching Chang, "Z-scan study of thermal nonlinearities in silicon naphthalocyanine-toluene solution with the excitations of the picosecond pulse train and nanosecond pulse," Opt. Express 15, 1718-1731 (2007)

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