%0 Journal Article
%A Benitez-Martin, Carlos
%A Li, Shiming
%A Dominguez-Alfaro, Antonio
%A Najera, Francisco
%A Pérez-Inestrosa, Ezequiel
%A Pischel, Uwe
%A Andréasson, Joakim
%T Toward Two-Photon Absorbing Dyes with Unusually Potentiated Nonlinear Fluorescence Response.
%D 2020
%U http://hdl.handle.net/10668/16107
%X The combination of two two-photon-induced processes in a Förster resonance energy transfer (FRET)-operated photochromic fluorene-dithienylethene dyad lays the foundation for the observation of a quartic dependence of the fluorescence signal on the excitation light intensity. While this photophysical behavior is predicted for a four-photon absorbing dye, the herein proposed approach opens the way to use two-photon absorbing dyes, reaching the same performance. Hence, the spatial resolution limit, being a critical parameter for applications in fluorescence imaging or data storage with common two-photon absorbing dyes, is dramatically improved.
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