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Proceedings Paper

Justification of two-level approximation for description of two-photon absorption in oxazine dyes
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Paper Abstract

We measure and quantitatively analyze two-photon absorption (2PA) spectra and cross sections in a series of Oxazine molecules with varying chemical structures. We compare values of the permanent dipole moment difference (Δμ) obtained by three different methods: (a) 2PA cross sections using two-level approximation; (b) Stark spectroscopy, and (c) solvatochromic shifts. The first two methods give coinciding Δμ values, thus justifying two-level approximation, while solvatochromic shifts measurements yield systematically higher Δμ values. Possible reasons for such a discrepancy are discussed.

Paper Details

Date Published: 1 March 2010
PDF: 8 pages
Proc. SPIE 7599, Organic Photonic Materials and Devices XII, 75990X (1 March 2010); doi: 10.1117/12.842790
Show Author Affiliations
Erich Beuerman, Montana State Univ. (United States)
Nikolay S. Makarov, Montana State Univ. (United States)
Mikhail Drobizhev, Montana State Univ. (United States)
Aleksander Rebane, Montana State Univ. (United States)
National Institute of Chemical Physics and Biophysics (Estonia)

Published in SPIE Proceedings Vol. 7599:
Organic Photonic Materials and Devices XII
Robert L. Nelson; François Kajzar; Toshikuni Kaino, Editor(s)

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