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|Title:||Influence of axial substitution on the optical limiting properties of indium porphyrins|
|Authors:||Ang, S.G. |
|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|
|Appears in Collections:||Staff Publications|
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