Two-photon absorption and nonlinear optical properties of a new organic dye trans-4-[p-(N-hydroxyethyl-N-methylamino)styryl]-N-methylpyridinium p-toluene sulfonate

Citation
Gy. Zhou et al., Two-photon absorption and nonlinear optical properties of a new organic dye trans-4-[p-(N-hydroxyethyl-N-methylamino)styryl]-N-methylpyridinium p-toluene sulfonate, JPN J A P 1, 40(3A), 2001, pp. 1250-1252
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
3A
Year of publication
2001
Pages
1250 - 1252
Database
ISI
SICI code
0021-4922(200103)40:3A<1250:TAANOP>2.0.ZU;2-9
Abstract
Trans-4-[p-(N-hydroxyethyl-N-methylamino)styryl]-N-methylpyridinium p-tolue ne sulfonate (abbreviated as HMASPS) is a newly synthesized dye that posses ses a much greater two-photon-absorption (TPA) cross-section and much stron ger upconversion fluorescence emission than common dyes (such as rhodamine) when excited with near infrared laser radiation. TPA induced upconverted l asing has been obtained in HMASPS solution in dim ethylformamide (abbreviat ed as DMF) pumped by near infrared laser beam from 900 to 1150 nm. The cent ral wavelength and bandwidth of the lasing are 626 nm and 26 nm. The upconv ersion efficiencies of 1cm-path HMASPS solution in DMF at 0.05 mol/l concen tration at different wavelengths from 900 to 1150 nm were measured. The net upconversion efficiency from the absorbed pump energy to the upconverted l asing output was 14% at the pump energy level of 2.04 mJ when the pump lase r beam was provided by Nd:YAG laser. The molecular TPA cross-section at 106 4 nm was sigma (2) = 6.0 x 10(-48) cm(4).s/photon measured by using an open aperture Z-scan system. The linear absorption, single-photon induced fluor escence, two-photon induced fluorescence and two-photon induced upconverted lasing properties have also been studied in this paper.