Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.451927
Title: Influence of axial substitution on the optical limiting properties of indium porphyrins
Authors: Ang, S.G. 
Ang, H.G 
Han, W.
Sun, B.W. 
Lee, M.K.Y.
Lee, Y.W.
Yang, G.Y.
Keywords: Axial substitution
Indium porphyrins
Optical limiting
Z-scan
Issue Date: 2002
Source: Ang, S.G., Ang, H.G, Han, W., Sun, B.W., Lee, M.K.Y., Lee, Y.W., Yang, G.Y. (2002). Influence of axial substitution on the optical limiting properties of indium porphyrins. Proceedings of SPIE - The International Society for Optical Engineering 4798 : 195-202. ScholarBank@NUS Repository. https://doi.org/10.1117/12.451927
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 532 nm 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.
Source Title: Proceedings of SPIE - The International Society for Optical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/95473
ISSN: 0277786X
DOI: 10.1117/12.451927
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