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Scientists Propose Design Strategies for Two-Photon Absorption

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The principle behind two-photon-excited fluorescence microscopy is simple: In the presence of laser pulses, molecules simultaneously can absorb two or more photons at longer wavelengths with the same effect as absorbing one photon at a much shorter wavelength. Unfortunately for science, most known organic molecules have a relatively small photon absorption cross section, and the criteria for designing materials with a higher absorption threshold has remained a mystery. That is until now. A collection of researchers from Cornell University in Ithaca, N.Y., the Center for Research on Molecular...Read full article

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    Published: December 1998
    MicroscopyResearch & TechnologyTech Pulse

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