Metalloporphyrins for quadratic nonlinear optics

Sen, Avijit ; Ray, Paresh Chandra ; Das, Puspendu Kumar ; Krishnan, Varadachari (1996) Metalloporphyrins for quadratic nonlinear optics Journal of Physical Chemistry A, 100 (50). pp. 19611-19613. ISSN 1089-5639

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CuII- and ZnII-based donor-acceptor porphyrins have been examined for second-order nonlinear optics using the hyper-Rayleigh scattering technique at 1064 nm. Introduction of the metal ions enhances the first hyperpolarizability (β) of the free-base donor-acceptor porphyrins significantly. The open shell CuII (d9) has a greater influence on β of these porphyrin systems than the closed shell ZnII (d10). The high β values in the ZnII porphyrins are understood in terms of the change in dipole moments upon excitation within the context of the two-state model as well as two-photon resonance enhancement. In CuII porphyrin complexes a large number of excited states seem to contribute to β with, perhaps, a little contribution from two-photon resonance at the excitation wavelength.

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Source:Copyright of this article belongs to American Chemical Society.
ID Code:10042
Deposited On:02 Nov 2010 10:03
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