摘要
Four kinds of Au nanorods（NRs）with different aspect ratios are designed to adjust the relationship between resonance energy level of longitudinal（L）and transverse（T）modes.During the femto-second Z-scan experiments,huge saturable absorption phenomena are observed while the energy level T is located between one to two times of the energylevel L.This means that the energy may transfer between longitudinal and transverse energylevels in the same and/or different Au NRs.It effectively depresses the production of revised saturated absorption and increases the saturable absorption efficiency.This method is significant for the preparation of high-efficiency saturable absorption devices.
Four kinds of Au nanorods（NRs）with different aspect ratios are designed to adjust the relationship between resonance energy level of longitudinal（L）and transverse（T）modes.During the femto-second Z-scan experiments,huge saturable absorption phenomena are observed while the energy level T is located between one to two times of the energylevel L.This means that the energy may transfer between longitudinal and transverse energylevels in the same and/or different Au NRs.It effectively depresses the production of revised saturated absorption and increases the saturable absorption efficiency.This method is significant for the preparation of high-efficiency saturable absorption devices.
作者
肖思
王慧
刘圣
李敏
王迎威
陈嘉璋
郭路华
李建波
何军
Si Xiao;Hui Wang;Sheng Liu;Min Li;Ying-Wei Wang;Jia-Zhang Chen;Lu-Hua Guo;Jian-Bo Li;Jun He(Hunan Key Laboratory of Super-microstructure and U1trafast Process,School of Physics and Electronics,Central South University,Changsha 410083;School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116;Institute of Mathematics and Physics,Central South University of Forestry and Technology,Changsha 410004)
基金
Supported by the National Natural Science Foundation of China under Grant Nos 11404410 and 11504105
the Hunan Provincial Natural Science Foundation under Grant No 2016JJ3140
