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14 July 2003 Preparation and nonlinear optical properties of phthalocyanine nanocrystals
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Proceedings Volume 4991, Organic Photonic Materials and Devices V; (2003)
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States
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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christian Nitschke, Sean M. O'Flaherty, Michael Kroell, Adam Strevens, Stefanie Maier, Manuel G. Ruether, and Werner J. Blau "Preparation and nonlinear optical properties of phthalocyanine nanocrystals", Proc. SPIE 4991, Organic Photonic Materials and Devices V, (14 July 2003);

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