金纳米旋转椭球的光吸收和散射特性优化  

Optimization of Light Absorption and Scattering Properties of Gold Nanospheroids

作　　者：夏伊丁·亚库普 帕尔哈提江·吐尔孙[1,2] 武盼盼 Yakupu Xiayiding;Tuersun Paerhatijiang;Wu Panpan(School of Physics and Electronic Engineering,Xinjiang Normal University,Urumqi,Xinjiang 830054,China;Key Laboratory of Novel Light Source and Micro/Nano-Optics,Xinjiang Normal University,Urumqi,Xinjiang 830054,China)

机构地区：[1]新疆师范大学物理与电子工程学院,新疆乌鲁木齐830054 [2]新疆师范大学新型光源与微纳光学重点实验室,新疆乌鲁木齐830054

出　　处：《光学学报》2020年第4期187-194,共8页Acta Optica Sinica

基　　金：国家自然科学基金(11764042);新疆维吾尔自治区“百名青年博士引进计划”项目(BS2016002);新疆维吾尔自治区高校科研计划项目(XJEDU20161032);新疆师范大学新型光源与微纳光学重点实验室招标课题(XJNUSYS092017A02)。

摘　　要：针对金纳米旋转椭球在光热治疗和生物成像中的应用,利用T矩阵方法和介电函数尺寸修正模型,从理论上定量研究金纳米旋转椭球的共振光吸收与散射特性,对金纳米旋转椭球的尺寸参数进行优化,获得最优的短半轴与长半轴。对于光热治疗中的常用波长,在特定尺寸参数范围内优化的金纳米旋转椭球在波长1064nm处具有最大的吸收特性;对于生物成像中的常用波长,在特定尺寸参数范围内优化的金纳米旋转椭球在波长1310nm处具有最大的散射特性。与金纳米球壳的优化结果对比发现,金纳米旋转椭球在光热治疗和生物成像的应用中比金纳米球壳具有明显的优势。The resonant light absorption and scattering properties of gold nanospheroids were quantitatively studied for their application in photothermal therapy(PPTT)and biological imaging via the T-matrix method with a sizedependent dielectric function.The size parameters,including the minor and major semi-axes,of these Au nanospheroids were accordingly optimized;for the common wavelengths used in PPTT and biological imaging,the optimized nanospheroids exhibited the maximum absorption and scattering at 1064 nm and 1310 nm,respectively,within the range of specified size parameters.The comparison of these results with those obtained by optimized gold nanoshells demonstrated the obvious advantage of these gold nanospheroids for PPTT and biological imaging applications.

关 键 词：散射 光吸收与散射 优化 T矩阵方法 光热治疗 生物成像 

分 类 号：O436.2[机械工程—光学工程]