We succeeded to observe fluorescence enhancement and tunable laser emission from spin coated films of DNAcetyltrimetylammonium
(CTMA) complex doped with weakly fluorescent cyanine dyes, DiQC2(1) and DiQC2(3) which
were optically excited by interfering two beams forming a induced dynamic grating. Wavelength tuning of the laser
emission was achieved by varying the angle between the pumping beams determining the grating period on the film.
Degradation processes of the dye-doped films of DNA complex and PMMA were investigated and compared by
monitoring absorption spectra after continuous excitation with a pulsed laser. Roles of DNA for fluorescence
enhancement and improved durability were confirmed for these cyanine dyes.
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Toshifumi Chida and Yutaka Kawabe
Tunable DFB lasers based on DNA-surfactant-dye complexes
", Proc. SPIE 8464, Nanobiosystems: Processing, Characterization, and Applications V, 84640E (October 15, 2012); doi:10.1117/12.928551; http://dx.doi.org/10.1117/12.928551