Abstract
We formed thin films of vanadylphthalocyanine (VOPc), vanadyldibenzophthalocyanine (VODBPc), and vanadylnaphthalocyanine (VONc) on sapphire substrates and measured their third-harmonic generation (THG) at 1.6 and 1.9 μm. The χ (3) values of amorphous and crystalline films were in the order VOPc>VODBPc>VONc. The third-order hyperpolarizabilities estimated at 1.6 μm from the χ (3) values of amorphous films were also in the same order.
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