Push-Pull Organic Chromophores for Frequency-Upconverted Lasing

Properly designed organic molecules where a π‐conjugated bridge is end‐capped by an electron‐donor and electron‐withdrawing group (push–pull chromophores) can show, under specific conditions, frequency‐upconverted lasing emission. Materials based on these dyes are therefore able to convert the emiss...

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Bibliographic Details
Published inAdvanced materials (Weinheim) Vol. 12; no. 24; pp. 1963 - 1967
Main Authors Abbotto, A., Beverina, L., Bozio, R., Bradamante, S., Ferrante, C., Pagani, G. A., Signorini, R.
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag GmbH 01.12.2000
WILEY‐VCH Verlag GmbH
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Summary:Properly designed organic molecules where a π‐conjugated bridge is end‐capped by an electron‐donor and electron‐withdrawing group (push–pull chromophores) can show, under specific conditions, frequency‐upconverted lasing emission. Materials based on these dyes are therefore able to convert the emission of a cheap and easily available infrared (IR) laser (e.g., 800 nm radiation) into more useful visible (vis) laser emission via a two‐photon absorption induced fluorescence phenomenon. The design of the molecular structure, the substituent effect, and modulation of the electronic and geometric parameters can be used in order to optimize and tune frequency emission and conversion efficiency. Examples of some of the best dyes reported to‐date and organic design strategies employed are discussed in this article. Organic materials capable of converting infrared wavelength laser light into visible wavelength laser light are described. The molecular and electronic structures of “push–pull”, donor–acceptor systems, such as that shown in the figure, can be tuned by appropriate substitution of the ring systems to allow the conversion efficiencies and the emission wavelengths of the systems to be optimized.
Bibliography:istex:C7FBA05A194ED6C97B9C517B663728E0FA8EE657
ark:/67375/WNG-GGBGHZKR-G
ArticleID:ADMA1963
ISSN:0935-9648
1521-4095
DOI:10.1002/1521-4095(200012)12:24<1963::AID-ADMA1963>3.0.CO;2-S