Third-order nonlinear optical susceptibilities of the Langmuir–Blodgett films of octa-substituted metallophthalocyanines
- 15 July 1996
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 69 (3) , 293-295
- https://doi.org/10.1063/1.118037
Abstract
The third-order susceptibilities χ(3)(−3ω:ω,ω,ω) of Langmuir–Blodgett films of a series of octasubstituted metallophthalocyanines have been measured by third-harmonic generation experiments at 1.064 and 1.904 μm. For the latter excitation wavelength a marked enhancement of the nonlinearity for the cobalt-containing compound has been found, and χ(3) values are one order of magnitude larger than for the other systems. The effect has been associated to the role of two-photon allowed metal (possibly d−d) transitions in the cobalt derivative.Keywords
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