物理学报2011，Vol.60Issue(4)：437-442,6.
椭圆截面金纳米管的局域表面等离激元共振特性研究
Localized surface plasmon resonance properties of elliptical gold nanotubes
摘要
Abstract
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.关键词
消光光谱/局域表面等离激元共振/金纳米管/时域有限差分方法Key words
gold nanotube/ plasmon resonance/ extinction spectra/ finite difference time domain引用本文复制引用
丛超,吴大建,刘晓峻..椭圆截面金纳米管的局域表面等离激元共振特性研究[J].物理学报,2011,60(4):437-442,6.基金项目
国家自然科学基金(批准号:10904052,10874088)和中国博士后科学基金(批准号:20090461098)资助的课题. （批准号:10904052,10874088）
