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Proceedings Paper

Preparation and nonlinear optical properties of phthalocyanine nanocrystals
Author(s): Christian Nitschke; Sean M. O'Flaherty; Michael Kroell; Adam Strevens; Stefanie Maier; Manuel G. Ruether; Werner J. Blau
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Paper Abstract

Zinc-2, 9,16,23 -tetra- tert-butyl-29H, 31H -phthalocyanines and Zinc-2, 9,16,23-tetrakis-(phenylthio)-29H, 31H-phthalocyanines were recrystallized from an acetone solution to give regular shaped spherical particles of 50nm diameter, confirmed by transmission electron microscopy (TEM) and atomic force microscopy (AFM). A peak broadening of the Q-Band and a shift of the B-Band in the UV-Visible absorption spectrum combined with a significant fluorescence quenching was observed. The z-scan technique was used to investigate the non-linear optical properties and an increase of approximately 200% in the ratio of excited to ground state absorption cross sections in the crystal state was observed indicative of a significant increase in the optical limiting response of the crystals compared to the monomers.

Paper Details

Date Published: 14 July 2003
PDF: 9 pages
Proc. SPIE 4991, Organic Photonic Materials and Devices V, (14 July 2003); doi: 10.1117/12.475443
Show Author Affiliations
Christian Nitschke, Trinity College Dublin (Ireland)
Sean M. O'Flaherty, Trinity College Dublin (Ireland)
Michael Kroell, Trinity College Dublin (Ireland)
Adam Strevens, Trinity College Dublin (Ireland)
Stefanie Maier, Trinity College Dublin (Ireland)
Manuel G. Ruether, Trinity College Dublin (Ireland)
Werner J. Blau, Trinity College Dublin (Ireland)

Published in SPIE Proceedings Vol. 4991:
Organic Photonic Materials and Devices V
James G. Grote; Toshikuni Kaino, Editor(s)

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