Herein we report our experimental results on nonlinear optical properties of (H2)₂SnPc (I), Sn(OH)₂Pc (II), and Sn(Cl)₂Pc (III) studied using Z-scan technique with 800 nm, 100 fsec pulses, and 633 nm continuous wave (cw) laser excitation. Femtosecond open-aperture Z-scan data revealed these molecules exhibited strong 3PA coefficient (α₃). The estimated values of α₃ were ~4.0×10^-5, ~2.0×10^-5 cm³/GW², and ~1.5×10^-5 cm³/GW² for I, II, and III respectively obtained after deducting the solvent contribution. Closed aperture data recorded with femtosecond pulses revealed positive nonlinearity for all the molecules. We also observed large nonlinear response in the cw regime at 633 nm. Closed aperture scans performed with 633 nm indicated strong negative nonlinearity while open aperture scans depicted mixed response. The performance of these alkyl phthalocyanines in various time domains vis-à-vis recently reported phthalocyanines is discussed in detail.

Date Published: 23 February 2009
PDF: 10 pages
Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 719715 (23 February 2009); doi: 10.1117/12.808401

Published in SPIE Proceedings Vol. 7197:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII
Peter E. Powers, Editor(s)