Two-photon absorption (TPA) and frequency-upconversion properties of a new upconversion laser dye trans-4-[p-(N-hydroxyethyl-N-methyl-amino)styryl]-N-meth-ylpyridinium toluene-p-sulfonate (abbreviated to HMASPS) were ...Two-photon absorption (TPA) and frequency-upconversion properties of a new upconversion laser dye trans-4-[p-(N-hydroxyethyl-N-methyl-amino)styryl]-N-meth-ylpyridinium toluene-p-sulfonate (abbreviated to HMASPS) were reported in this note. The linear absorption, TPA, single-photon induced fluorescence, 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 induced fluorescence peak, and the blue shift for that of TPA induced up-converted lasing compared with that of TPA induced fluorescence, were explained by using re-absorption effect. TPA peak was at 930 nm. There is an 11 nm blue shift for two-photon energy of TPA peak compared with the linear absorption peak. The molecular TPA cross-section σ’2 at1064 nm was measured to be 6.0×10-48 cm4 .s/photon by using the open展开更多
基金The authors would like to thank Yang Zhaohe for the measurement of spectrum This work was supported by the State Key Program of China.
文摘Two-photon absorption (TPA) and frequency-upconversion properties of a new upconversion laser dye trans-4-[p-(N-hydroxyethyl-N-methyl-amino)styryl]-N-meth-ylpyridinium toluene-p-sulfonate (abbreviated to HMASPS) were reported in this note. The linear absorption, TPA, single-photon induced fluorescence, 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 induced fluorescence peak, and the blue shift for that of TPA induced up-converted lasing compared with that of TPA induced fluorescence, were explained by using re-absorption effect. TPA peak was at 930 nm. There is an 11 nm blue shift for two-photon energy of TPA peak compared with the linear absorption peak. The molecular TPA cross-section σ’2 at1064 nm was measured to be 6.0×10-48 cm4 .s/photon by using the open
