Plasmon resonance coupling in strongly coupled gold nanotube arrays with structural defects |
| |
Authors: | Zhou Xin Fang Jian-Shu Yang Di-Wu Liao Xiang-Ping |
| |
Institution: | School of Sciences, Hunan University of Technology, Zhuzhou 412008, China |
| |
Abstract: | We theoretically investigate the transmission spectra and the field distributions with different defects in the gold nanotube arrays by using the finite-difference time-domain method. It is found that the optical properties of the nanotube arrays are strongly influenced by different defects. When there are no defects in the central nanotube, the values of peaks located at both sides of photonic band gap have their maxima. Based on the distributions of electric field component Ex and the total energy distribution of the electric and the magnetic field, we show that there exhibits mainly a dipole field distribution for the plasmon mode at the long-wavelength edge of the band gap but higher order modes of the composite are excited at the short-wavelength edge of the band gap. The plasmon resonant modes can also be controlled by introducing defects. |
| |
Keywords: | structural defect transmission spectra gold nanotube array field distributions |
本文献已被 CNKI 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |