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SPs of Composite Structure of Dielectric Grating/Metal Film with Silver Cube
Wang, Xiang-Xian1; Pang, Zhi-Yuan1; Zhang, Dong-Yang1; Bai, Xue-Lin1; Feng, Wang-Jun1; Qi, Yun-Ping2
刊名Guangzi Xuebao/Acta Photonica Sinica
2018-11-01
卷号47期号:11
关键词Dielectric materials Electric fields Finite element method Raman scattering Silver Structure (composition) Surface plasmons Surface scattering Dielectric grating Electric field enhancement Electric field enhancement factor Electric-field intensity distribution Local surface plasmons Resonant couplings Surface enhanced Raman Scattering (SERS) Ultra-high electric fields
ISSN号10044213
DOI10.3788/gzxb20184711.1131001
英文摘要A composite structure of dielectric grating/metal film with silver nanocubes is theoretically designed, and the ultrahigh electric field enhancement factor in the composite structure is numerically simulated using the finite element method. The surface plasmons are excited by the laser with wavelength of 442 nm. By discussing the extinction spectrum of the silver nanocubes with different sizes, and the reflection spectra of the grating with different period and thickness, the optimal parameters are selected, which the side length of silver nanocubes is 70 nm, the period of grating is 312 nm and the thickness is 90 nm. Under the condition of optimal parameters, electric field intensity distribution in the composite structure is calculated. For the resonant coupling of local surface plasmon and propagation surface plasmon in the dielectric grating/metal film with silver nanocubes composite structure. The electric field enhancement factor of hot spot is as high as 1.53×106, which exists in the position between grating ridge and the lower vertexes of silver nanocube. The ultrahigh electric field enhancement generated by the composite structure has the potential to be applied to the study of surface-enhanced Raman scattering. © 2018, Science Press. All right reserved.
WOS研究方向Optics
语种中文
出版者Chinese Optical Society
WOS记录号WOS:000452376300024
内容类型期刊论文
源URL[http://ir.lut.edu.cn/handle/2XXMBERH/114480]  
专题理学院
作者单位1.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China;
2.College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou; 730070, China
推荐引用方式
GB/T 7714
Wang, Xiang-Xian,Pang, Zhi-Yuan,Zhang, Dong-Yang,et al. SPs of Composite Structure of Dielectric Grating/Metal Film with Silver Cube[J]. Guangzi Xuebao/Acta Photonica Sinica,2018,47(11).
APA Wang, Xiang-Xian,Pang, Zhi-Yuan,Zhang, Dong-Yang,Bai, Xue-Lin,Feng, Wang-Jun,&Qi, Yun-Ping.(2018).SPs of Composite Structure of Dielectric Grating/Metal Film with Silver Cube.Guangzi Xuebao/Acta Photonica Sinica,47(11).
MLA Wang, Xiang-Xian,et al."SPs of Composite Structure of Dielectric Grating/Metal Film with Silver Cube".Guangzi Xuebao/Acta Photonica Sinica 47.11(2018).
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