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Proceedings Paper

Influence of axial substitution on the optical limiting properties of indium porphyrins
Author(s): Siau Gek Ang; How Ghee Ang; Wei Han; Bai Wang Sun; May Ka Yuen Lee; Yiew Wang Lee; Guo Ying Yang
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Paper Abstract

Optical limiting properties in CH2Cl2 solution of a series of axially substituted InTPP (indium tetraphenyl-porphyrin) and axially substituted InTTP (indium tetra-p-tolyl-porphyrin) are investigated using a 532nm laser with a pulse duration of 5 ns. The axial substitutions include -Cl, -SCN, -SPh and -SPh(p-Me). The optical limiting measurements reveal that the optical limiting properties of the indium porphyrins are greatly influenced by the axially attached functional groups. A limiting threshold of 0.18 J/cm2 is achieved for TTPInSCN, which is the best optical limiting material in this report. Z-scan experiments are also conducted and confirm that the good optical limiting performance of these indium porphyrins is due to the large value of σex/σg.

Paper Details

Date Published: 18 December 2002
PDF: 8 pages
Proc. SPIE 4798, Linear and Nonlinear Optics of Organic Materials II, (18 December 2002); doi: 10.1117/12.451927
Show Author Affiliations
Siau Gek Ang, National Univ. of Singapore (Singapore)
How Ghee Ang, National Univ. of Singapore (Singapore)
Wei Han, National Univ. of Singapore (Singapore)
Bai Wang Sun, National Univ. of Singapore (Singapore)
May Ka Yuen Lee, DSO National Labs. (Singapore)
Yiew Wang Lee, DSO National Labs. (Singapore)
Guo Ying Yang, DSO National Labs. (Singapore)

Published in SPIE Proceedings Vol. 4798:
Linear and Nonlinear Optics of Organic Materials II
Manfred Eich; Mark G. Kuzyk, Editor(s)

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