Broadband negative refractive index at visible range with composite materials

被引：1
|
作者：
Keshavarz, M. [1 ]
Rostami, A. [1 ,2 ]
Dolatyari, M. [2 ]
Rostami, G. [2 ]
Khosravi, S. [1 ]
机构：
[1] Univ Tabriz, OIC Res Grp, Tabriz 166614761, Iran
[2] ASEPE Co, SP EPT Labs, Ind Pk Adv Technol, Tabriz 5364196795, Iran
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2016年 / 48卷 / 12期
关键词：
Effective medium; Negative refractive index; Superposition; Spherical nanoparticles; Visible spectrum;
D O I：
10.1007/s11082-016-0797-2
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：
In this research work, composite media based on metamaterials including random distribution of spherical nanoparticles in a polymeric foam host are suggested to achieve negative effective refractive index in the visible spectrum. For this purpose structures including single, two and three layer spherical particles are investigated. Based on simulation results, media including single layer spheres (metallic and dielectric particles) and two layer nanospheres (core-shell particles consist of metallic core and dielectric shell) based on superposition of nanoparticles with different sizes and fill fractions are proposed for desired result. In this work, to obtain optimized band with negative RI media, superposition of three layer nanoparticles and doped semiconductor are designed.
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页数：10
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