首页
登录
注册
多层金属纳米点阵的制备及其光学性质的研究*
Fabrication of multilayer metal-dielectric nanoparticles and their optical properties
-
摘要: 采用纳米球刻蚀法结合热蒸发技术制备了银和氧化硅交替层叠的纳米颗粒阵列。扫描隧道显微镜测量结果表明，该纳米阵列呈锥形多层结构。分光光度计测量样品表明，该纳米阵列在近红外波段存在明显的透射谷，该透射谷来源于金属纳米颗粒局域等离激元的激发，随着金属/介质层数的增多，透射谷的位置向短波方向移动。利用HFSS软件对该纳米阵列进行了仿真，并分析了透射谷蓝移的原因。Abstract: We use nanosphere lithography and thermal evaporation techniques to fabricate multilayer metal-dielectric cone nanoparticle ar-rays. Scanning electron microscope measurements reveal that the ordered nanoparticles are of triangular shapes. Optical transmittance measurements show that there is a transmittance dip for each sample, and the transmittance dip is caused by the localized surface plas-mon resonance of the metal/dielectric particles. With the increase of the number of the metal/dielectric layers of a sample, the position of the transmittance dip of the sample shows a blue-shift. Moreover, the transmittance spectrum and the electric field distribution of the metal/dielectric nanoparticles are simulated by HFSS, and the electric field distribution is used to explain the blue-shift phenomenon.
-
-
计量
- 文章访问数: 504
- HTML全文浏览数: 241
- PDF下载数: 0
- 施引文献: 0
下载: