Understanding strong two-photon absorption in pi-conjugated porphyrin dimers via double-resonance enhancement in a three-level model.

Journal article

We present the two-photon absorption (2PA) spectra of a series of conjugated porphyrin dimers and show that they possess extremely large intrinsic (femtosecond) peak 2PA cross sections, up to sigma2 = 1 x 104 GM in the near-IR region; these are among the highest values measured for any organic molecule. Moreover, we demonstrate that the second-order perturbation theory applied to a simple three-level model gives a perfect quantitative description of the observed 2PA cross section. By comparin...

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Authors: Drobizhev, M; Stepanenko, Y; Dzenis, Y; Karotki, A; Rebane, A

• Publication status: Published
• Journal: Journal of the American Chemical Society
• Volume: 126
• Issue: 47
• Pages: 15352-15353
• Publication date: 2004-12-01
• DOI: 10.1021/ja0445847
• EISSN: 1520-5126
• ISSN: 0002-7863
• Language: English