A novel plasmonic elliptical nanocluster and investigating Fano response in - and T-shaped arrays

被引：12

作者：

Bazgir, Maryam ^{[1
]}

Novin, Shohreh Nouri ^{[2
]}

Zarrabi, Ferdows B. ^{[3
]}

Heydari, Samaneh ^{[4
]}

Arezoomand, Afsaneh Saee ^{[5
]}

机构：

[1] Islamic Azad Univ, Arak Branch, Fac Engn, Arak, Iran

[2] Imam Khomeini Int Univ, Fac Engn & Technol, Qazvin, Iran

[3] Islamic Azad Univ, Babol Branch, Young Researchers & Elite Club, Babol Sar, Iran

[4] Islamic Azad Univ, Isfahan Khorasgan Branch, Dept Elect Engn, Esfahan, Iran

[5] Islamic Azad Univ, Urmia Branch, Young Researchers & Elite Club, Orumiyeh, Iran

来源：

ELECTROMAGNETICS | 2018年 / 38卷 / 04期

关键词：

Fano resonance; plasmonic; Elliptical Nano antenna; dark mode; RESONANCE; NANOCAVITIES;

D O I：

10.1080/02726343.2018.1457265

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Fano resonance has been considered especially in nanostructures for energy enhancement and creating hot spots in nanoparticles based on plasmonic properties. In this paper, a novel arrangement of elliptical nanoantenna has been noticed for improving the electric field and energy enhancement in hot spots for mid-infrared range. For this, elliptical cylinders and elliptical rings are developed for dark mode by the concentration of plasmonic charges in a limited area, and the interaction between bright and dark mode has been used for the Fano shape of the extinction cross section. The combination of dipole arrangement has been implemented based on elliptical hollow cylindrical particles with various inner radios for arousing the Fano resonance. Finally, - and T-shaped models are studied for Fano resonance, and the electric fields are compared in all cases. Exactly, this study is important for two main reasons: (1) it shows how we can control the extinction cross section and (2) it shows that by distortion for linear array the Lorentzian shape is changed to Fano shape.

引用

页码：207 / 216

页数：10

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