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Proceedings Paper

Picosecond and nanosecond third order nonlinear optical characterization of Cu and Ni phthalocyanines using Z-scan technique
Author(s): S. Venugopal Rao; Amit Kumar Prasad; L. Giribabu; S. P. Tewari
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Paper Abstract

Herein we present our results from the picosecond and nanosecond nonlinear optical studies of two novel phthalocyanines {[(SO3Na)4CuPc] and [(SO3Na)4NiPc]} using the Z-scan technique. Open aperture Z-scan data revealed that the picosecond nonlinear absorption was dominated by three-photon absorption while in the nanosecond domain reverse saturable absorption prevailed. Closed aperture data with nanosecond pulses indicated strong thermal, negative nonlinearity while picosecond excitation demonstrated positive nonlinearity. The nonlinearity in CuPc was higher than in NiPc in both the time domains. The nonlinear coefficients extracted from the fits to experimental data were large compared to some of the recently reported works on similar molecules.

Paper Details

Date Published: 1 March 2010
PDF: 8 pages
Proc. SPIE 7599, Organic Photonic Materials and Devices XII, 75991O (1 March 2010); doi: 10.1117/12.841944
Show Author Affiliations
S. Venugopal Rao, Univ. of Hyderabad (India)
Amit Kumar Prasad, Cochin Univ. of Science and Technology (India)
L. Giribabu, Indian Institute of Commerce and Trade (India)
S. P. Tewari, Univ. of Hyderabad (India)

Published in SPIE Proceedings Vol. 7599:
Organic Photonic Materials and Devices XII
Robert L. Nelson; François Kajzar; Toshikuni Kaino, Editor(s)

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