Localized surface plasmon resonance properties of elliptical gold nanotubes

被引：4

作者：

Cong Chao ^{[1
]}

Wu Da-Jian ^{[1
]}

Liu Xiao-Jun ^{[1
]}

机构：

[1] Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China

来源：

ACTA PHYSICA SINICA | 2011年 / 60卷 / 04期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

gold nanotube; plasmon resonance; extinction spectra; finite difference time domain; ELECTROMAGNETIC ENERGY-TRANSPORT; ENHANCED RAMAN-SCATTERING; OPTICAL-PROPERTIES; EMBEDDING MEDIUM; DIELECTRIC CORE; HYBRIDIZATION; NANOPARTICLE; NANOSHELLS; ABSORPTION; SIZE;

D O I：

10.7498/aps.60.046102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effects of ellipse shape, polarization direction of incident light, shell thickness, and dielectric constants of core and embedding medium on the localized surface plasmon resonance (LSPR) of elliptical gold nanotube have been investigated by the Finite Difference Time Domain (FDTD) method. When the semimajor axis is fixed, it is found that with the increase of the semiminor axis of the ellipse the extinction peak of the gold nanotube has a red-shift. With the increase of the angle between the incident polarization and the semimajor axis, the extinction peak has a red-shift. With the shell thickness decreasing, the extinction peak of gold nanotube also has a red-shift. Furthermore, we also find that the increase of the dielectric constant for core or embedding medium will induce a red-shift of LSPR in gold nanotube. The change of the extinction peak is ascribed to the plasmon hybridization and the competition between the variations of conduction and oscillation electrons.

引用

页数：6

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