Enhancing the electric fields around the nanorods by using metal grooves

• Published in: Science China. Physics, mechanics & astronomy Vol. 55; no. 10; pp. 1763 - 1768
• Main Authors: Zhao, YaNan, Qin, Yan, Cao, Wei, Zhang, ZhongYue
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science China Press 01.10.2012; Springer Nature B.V
• Subjects: Astronomy; Classical and Continuum Physics; Electric fields; Electron oscillations; Finite difference time domain method; Grooves; Light beams; Nanorods; Observations and Techniques; Physics; Physics and Astronomy; Silver; Substrates; 倾斜角; 多光束; 强电场; 时域有限差分方法; 电场分布; 系统; 纳米棒; 金属槽; nanorod-groove system; optical property; plasmon; finite difference time domain method
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-012-4853-z

To enhance electric fields around nanorods, a Ag nanorod-groove system is presented and its electric field distribution is studied using the finite difference time domain method. Since the superposition of the electric fields of the split multi-beam of light works as excitation for electron oscillations in the nanorods, enhanced electric fields occur around the nanorods. In addition, the effects of topological parameters of the nanorod-groove system, such as the oblique angle of the groove, displacement of the nanorod to the bottom of the groove, and separation between the nanorods on electric field distributions are also studied. These results may be helpful for designing substrates to obtain larger electric fields around nanorods.