Optical absorption tunability and local electric field distribution of gold-dielectric-silver three-layered cylindrical nanotube  

作　　者：Ye-Wan Ma Zhao-Wang Wu Yan-Yan Jiang Juan Li Xun-Chang Yin Li-Hua Zhang Ming-Fang 马业万;吴兆旺;江燕燕;李娟;尹训昌;章礼华;易明芳(School of Mathematics and Physics,Anqing Normal University,Anqing 246133,China)

机构地区：[1]School of Mathematics and Physics,Anqing Normal University,Anqing 246133,China

出　　处：《Chinese Physics B》2021年第11期358-366,共9页中国物理B（英文版）

基　　金：Project supported by the Programs for Anhui Provincial Natural Science Foundation,China(Grant Nos.1808085MA20 and 1808085MA05);Excellent Young Talents in University of Anhui Province,China(Grant No.gxyq2017027);the Key Scientific Research Foundation of Anhui Provincial Education Department,China(Grant Nos.KJ2019A0564 and KJ2018A0366);the Key Research and Development Projects of Anhui Province,China(Grant No.202004f06020021);Higher Educational Quality Engineering Projects of Anhui Province,China(Grant Nos.2020szsfkc0540,2020szsfkc0548,2020jyxm1080,and aqnu2019jyzc066).

摘　　要：The effects of inner nanowire radius,shell thickness,the dielectric functions of middle layer and surrounding medium on localized surface plasmon resonance(LSPR)of gold-dielectric-silver nanotube are studied based on the quasi-static approximation.Theoretical calculation results show that LSPR of gold-dielectric-silver nanotube and LSPR numbers can be well optimized by adjusting its geometrical parameters.The longer wavelength of |ω--> mode takes place a distinct red-shift with increasing the inner nanowire radius and the thickness of middle dielectric layer,while a blue-shift with increasing outer nanotube thickness.The physical mechanisms are explained based on the plasmon hybridization theory,induced charges and phase retardation.In addition,the effects of middle dielectric function and surrounding medium on LSPR,and the local electric field factor are also reported.Our study provides the potential applications of gold-dielectricsilver nanotube in biological tissues,sensor and related regions.

关 键 词：localized surface plasmon resonance gold-dielectric-silver nanotube quasi-static approximation plasmon hybridization theory 

分 类 号：TB383.1[一般工业技术—材料科学与工程]