Two-photon absorption and frequency-upconversion properties of a new organic dye HMASPS

Citation
Gy. Zhou et al., Two-photon absorption and frequency-upconversion properties of a new organic dye HMASPS, CHIN SCI B, 46(14), 2001, pp. 1220-1223
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
1001-6538 → ACNP
Volume
46
Issue
14
Year of publication
2001
Pages
1220 - 1223
Database
ISI
SICI code
1001-6538(200107)46:14<1220:TAAFPO>2.0.ZU;2-#
Abstract
Two-photon absorption (TPA) and frequency-upconversion properties of a new upconversion laser dye trans-4-[p-(N-hydroxyethyl-N-methyl-amino)styryl]-N- methylpyridinium. toluene-p-sulfonate (abbreviated to HMASPS) were reported in this note. The linear absorption, TPA, single-photon induced fluorescen ce, TPA induced fluorescence and TPA induced upconverted lasing spectra of HMASPS solution in dimethyl formamide (abbreviated to DMF) were measured at room temperature. The red shift for the central wavelength of TPA induced fluorescence peak, which was compared with that of the single-photon induce d fluorescence peak, and the blue shift for that of TPA induced upconverted lasing compared with that of TPA induced fluorescence, were explained by u sing re-absorption effect. TPA peak was at 930 nm. There is an 11 mn blue s hift for two-photon energy of TPA peak compared with the linear absorption peak. The molecular TPA cross-section sigma (2)' at 1064 mn was measured to be 6.0x10(-48) cm(4) . s/photon by using the open aperture Z-scanning syst em. The highest upconversion efficiency was measured to be 8.4% at 1064 mn.