Two- and three-photon absorption in a novel fluorene-based compound  

作　　者：马文波 吴谊群 顾冬红 干福熹 

机构地区：[1]Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences,Shanghai 201800 [2]Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences,Shanghai 201800,Lab of Functional Materials Heilongjiang University,Haerbin 150080

出　　处：《Chinese Optics Letters》2005年第6期351-354,共4页中国光学快报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (No. 60207005)Shanghai Science & Technology Development Foundation (No. 012261068)

摘　　要：A novel symmetrical charge transfer fluorene-based compound 2,7-bis (4-methoxystyryl)-9, 9-bis (2-ethylhexyl)-9H-fluorene (abbreviated as BMOSF) was synthesized and its nonlinear absorption was investigated using two different laser systems: a 140-fs, 800-nm Ti:sapphire laser operating at 1-kHz repetition rate and a 38-ps, 1064-nm Nd:YAG pulsed laser operating at 10-Hz repetition rate, respectively. Unique nonlinear absorption properties in this new compound were observed that rise from multiphoton absorption. The nonlinear absorption coefficients were measured to be 6.02×10-3 cm/GW (due to two-photon absorption, exciting wavelength is 800 nm) and 3.6×10-20 cm3/W2 (due to three-photon absorption, exciting wavelength is 1064 nm). This new compound possesses strong fluorescence induced by two-photon absorption and obvious three-photon absorption optical limiting effects.A novel symmetrical charge transfer fluorene-based compound 2,7-bis (4-methoxystyryl)-9, 9-bis (2-ethylhexyl)-9H-fluorene (abbreviated as BMOSF) was synthesized and its nonlinear absorption was investigated using two different laser systems: a 140-fs, 800-nm Ti:sapphire laser operating at 1-kHz repetition rate and a 38-ps, 1064-nm Nd:YAG pulsed laser operating at 10-Hz repetition rate, respectively. Unique nonlinear absorption properties in this new compound were observed that rise from multiphoton absorption. The nonlinear absorption coefficients were measured to be 6.02×10-3 cm/GW (due to two-photon absorption, exciting wavelength is 800 nm) and 3.6×10-20 cm3/W2 (due to three-photon absorption, exciting wavelength is 1064 nm). This new compound possesses strong fluorescence induced by two-photon absorption and obvious three-photon absorption optical limiting effects.

关 键 词：Charge transfer FLUORESCENCE Neodymium lasers Optical pumping Organic compounds Solid state lasers Stimulated emission 

分 类 号：TN241[电子电信—物理电子学]