title: Upconversion fluorescence and optical power limiting effects based on the two- and three-photon absorption process of a new organic dye BPAS.
abstract: A new organic dye, trans-4, 4'-bis(pyrrolidingl) stilbene (BPAS), with large two-photon absorption (TPA) and three-photon absorption (3PA) has been synthesized. The molecular TPA cross section sigma2' at 550-670 nm and the 3PA cross section sigma3' at 720-1000 nm have been measured. The biggest sigma2' and sigma3' was 5.77 x 10(-47) cm4s/photon and 27 x 10(-75) cm6 s2 at 600 and 980 nm, respectively. In the experiment process we found that the strongest TPA wavelength is not at two times of the strongest linear absorption wavelength, but there is some blue shift. The 3PA-induced optical power-limiting properties have also been illustrated at 980 nm.
authors.affiliation: Institute of Crystal Materials of Shandong University, State Key Laboratory of Crystal Materials, Jinan, China. zshao@icm.sdu.edu.cn
authors.forename: Guangyong
authors.initials: G
authors.lastname: Zhou
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Wang
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Zongshu
authors.initials: Z
authors.lastname: Shao
authors.forename: Minhua
authors.initials: M
authors.lastname: Jiang
mesh_terms: D000042:Absorption; D004396:Coloring Agents; D005453:Fluorescence; D055095:Optics and Photonics; D017785:Photons; D011759:Pyrrolidines; D013267:Stilbenes
chemical_list: C452381:4, 4'-bis(pyrrolidingl)stilbene; D004396:Coloring Agents; D011759:Pyrrolidines; D013267:Stilbenes