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Title: Photophysical and nonlinear optical properties of zincphthalocyanines with peripheral substitutions
Authors: Manaa, H.
Tuhl, A.
Samuel, J.
AL-Mulla, A.
AL-Awadi, N.A.
Makhseed, S.
Issue Date: Jan-2011
Publisher: Elsevier
Citation: Optics Communications, 2011, Vol.284, p450
Abstract: Photophysical and nonlinear optical properties of zinc phthalocyanines (ZnPc) bearing peripheral phenoxy substituents containing different functionalized groups were studied. Fluorescence spectra corresponding to the optical transition S1 → S0 are found to be appeared at 684 or 686.4 nm. Z-scan technique reveals large nonlinearities, where the absorptive and refractive effects are separately evaluated. Saturation absorption of ZnPc-1 was observed at 632.8 nm, with a very large nonlinear absorption coefficient β = -1.36 × 10-2 cm/W. However a strong nonlinear refractive effect was found in all ZnPcs (1-4). Transmitted versus incident irradiance measurements carried out on ZnPc-1 and ZnPc-2, showed a very clear optical limiting behavior with irradiance thresholds around be 44 W/cm2 and 90 W/cm2 respectively.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0030-4018
Alternative Location: 10.1016/j.optcom.2010.09.018
Copyright: 2011, Elsevier
Appears in Collections:Research Papers (TP)

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