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Optica, Optical Materials Express, 4(1), p. 700, 2011

DOI: 10.1364/ome.1.000700

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Broadband three-photon absorption spectra of platinum acetylide complexes

Journal article published in 2011 by L. X. Yuan, G. S. He, Marcelo G. Vivas ORCID, Y. P. Cui, M. Li, Erick Piovesan, P. N. Prasad, J. E. Rogers, J. E. Slagle, Daniel L. Silva, D. M. Krein, A. R. Burke, B. C. Hall, Thomas M. Cooper, A. Fratini and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We investigate the three-photon absorption spectra of four platinum acetylides complexes employing femtosecond pulses. We observed strong three-photon absorption cross-section in the near-infrared region (from 850 nm to 1200 nm). The three-photon absorption (3PA) spectra present resonance enhancement effect as two photons of the excitation wavelength approach the lower two-photon allowed states of the molecules as well as a 3PA allowed band around 1180 nm. The 3PA cross-section spectra were interpreted using the sum-over-essential-states approach, considering a three-energy-level diagram.