Strong near-infrared and ultrafast femtosecond nonlinearities of a covalently-linked triply-fused porphyrin dimer-SWCNT nanohybrid  

作　　者：Lulu Fu Jun Ye Hui Li Zhipeng Huang Mark GHumphrey Chi Zhang 

机构地区：[1]China-Australia Joint Research Center for Functional Molecular Materials,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China [2]China-Australia Joint Research Center for Functional Molecular Materials,School of Chemical Science and Engineerinz Ton^ii University,Shanghai 200092,China [3]Research School of Chemistry,Australian National University,Canberra,ACT 2601,Australia

出　　处：《Nano Research》2022年第2期1355-1365,共11页纳米研究（英文版）

基　　金：support from the National Natural Science Foundation of China(No.51432006);the Ministry of Science and Technology of China for the International Science Linkages Program(No.2011DFG52970);the Ministry of Education of China for the Changjiang Innovation Research Team(No.IRT14R23);the Ministry of Education and the State Administration of Foreign Experts Affairs for the 111 Project(No.B13025);the Innovation Program of Shanghai Municipal Education Commission.M.G.H thanks the Australian Research Council(No.DP 170100411)for support.

摘　　要：Functional materials displaying large ultrafast third-order optical nonlinearities across a wide spectral region and broad temporal domain are required for all-optical signal processing.Particularly desirable is nonlinear optical(NLO)activity at near-infrared(NIR)wavelengths with femtosecond pulses.Herein the first triply-fused porphyrin dimer(TFP)-functionalized single-walled carbon nanotube(SWCNT)nanohybrid was successfully constructed by covalently grafting TFPs onto SWCNT.The results of Z-scan techniques demonstrate that the newly obtained TFP-SWCNT nanohybrid was found with a strong NLO performance under both nanosecond and femtosecond irradiation.In the nanosecond regime,an enhancement in optical limiting(OL)of the TFP-SWCNT nanohybrid is seen at 532 nm when compared with the performance of porphyrin monomer-functionalized SWCNT nanohybrid Por-SWCNT.Under femtosecond irradiation,the TFP-SWCNT nanohybrid exhibits a particularly strong OL effect with a giant two-photon absorption(TPA)cross section value(ca.15,500 GM)at 800 nm pulses that mainly stems from intense TPA of TFP,in sharp contrast to the Por-SWCNT nanohybrid which exhibits only saturable absorption under identical irradiation.These results demonstrate that the newly-developed TFP-SWCNT nanohybrid is a very promising OL candidate for practical applications across wide spectral and temporal domains,and that covalently functionalizing carbon-based materials with triply-fused chromophores may be a useful approach to engineering adaptable photonic devices with broad-ranging NLO activity.

关 键 词：triply-fused porphyrin dimer carbon nanotube NEAR-INFRARED FEMTOSECOND nonlinear optical materials 

分 类 号：O437[机械工程—光学工程]