Th. Wei et al., Mechanism of reverse saturable absorption in chloro-aluminum phthalocyanine solution studied with Z-scan, CHEM P LETT, 314(5-6), 1999, pp. 403-410
Using the Z-scan technique with 532 nm laser pulses of dual widths in the p
icosecond regime, we distinguish between two-photon absorption (TPA) and ex
cited state absorption (ESA). To account for reverse saturable absorption i
n chloroaluminum phthalocyanine dissolved in methanol both TPA and ESA, rat
her than either one, need be invoked. (C) 1999 Elsevier Science B.V. All ri
ghts reserved.