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

Abstract:

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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Publication status:
Published

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Publisher copy:
10.1021/ja0445847

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Journal:
Journal of the American Chemical Society More from this journal
Volume:
126
Issue:
47
Pages:
15352-15353
Publication date:
2004-12-01
DOI:
EISSN:
1520-5126
ISSN:
0002-7863
Language:
English
Pubs id:
pubs:51808
UUID:
uuid:6ab092dd-ed66-4d84-b59a-85b896107714
Local pid:
pubs:51808
Source identifiers:
51808
Deposit date:
2012-12-19

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