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Lasing From a Förster Transfer Fluorescent Dye Couple Dissolved in a Chiral Nematic Liquid Crystal
Author(s) -
Chambers M.,
Fox M.,
Grell M.,
Hill J.
Publication year - 2002
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200290010
Subject(s) - lasing threshold , materials science , liquid crystal , fluorescence , dye laser , optoelectronics , laser , common emitter , excitation , exciton , wavelength , optics , photochemistry , physics , condensed matter physics , chemistry , quantum mechanics
Förster exciton transfer from a ’sensitizer’ to an ’emitter’ dye allows for the decoupling of the excitation and emission processes in dye lasers. Here, we report on the lasing from a Förster transfer couple dissolved in an unconventional, mirrorless resonator; namely, a chiral nematic liquid crystal (CNLC). We found optically pumped lasing at a threshold as low as 2.1 J m –2 . We also demonstrate simultaneous lasing at two widely separated wavelengths.