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Proceedings Paper

Optical limiting of β-octa-octyloxy-phthalocyanines for pecosecond pulses in solution
Author(s): Yu Chen; Duoyuan Wang; Yunjing Li; Yuxin Nie
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Paper Abstract

The optical limiting performances for β-octa-octyloxy phthalocyanines with initial linear transmission To = 88% to approximately 92% at 532 nm in a 5 mm spectroscopic cell in toluene have been measured with 35 ps pulses, in which β-octa-octyloxy phthalocyanine free-base exhibits the strongest optical limiting ability through a reverse saturable absorption from S1 → Sn excited singlet states with σs1 = 4.0 x 10-17 cm2. The optical limiting thresholds are 50, 130 and 140 mJ/cm2 at T/To = 0.5 for phthalocyanine free base, nickel phthalocyanine, and lead phthalocyanine respectively. The throughput of the phthalocyanine free base is clamped down to 70 mJ/cm2 with the limiting nonlinear transmittance Tlim = 18% as the incident fluence reaching to 400 mJ/cm2. The solubility, aggregation behavior and photo-stability for β-octa-octyloxy phthalocyanines have been studied. The solubility of the β-octa-octyloxy phthalocyanines has an obvious improving, which dissolve in non-polar solvent more easily than in polar solvent. The aggregation equilibrium constant k = 5.6 x 103 in toluene for phthalocyanine free base is lager that in mixed solvent (k' = 1.4 x 103), which means that the β-octa-octyloxy phthalocyanines aggregate more easily in non-polar solvent than in polar solvent through the π-π interaction. The β-octa-octyloxy lead phthalocyanine appeared a lower photo-stability among them.

Paper Details

Date Published: 14 February 2003
PDF: 11 pages
Proc. SPIE 4797, Multiphoton Absorption and Nonlinear Transmission Processes: Materials, Theory, and Applications, (14 February 2003); doi: 10.1117/12.446352
Show Author Affiliations
Yu Chen, Institute of Chemistry (China)
Duoyuan Wang, Institute of Chemistry (China)
Yunjing Li, Institute of Physics (China)
Yuxin Nie, Institute of Physics (China)

Published in SPIE Proceedings Vol. 4797:
Multiphoton Absorption and Nonlinear Transmission Processes: Materials, Theory, and Applications
A. Todd Yeates; Kevin D. Belfield; Stephen J. Caracci; Christopher M. Lawson; Francois Kajzar; A. Todd Yeates; Kevin D. Belfield; Stephen J. Caracci, Editor(s)

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