Broadband negative refractive index at visible range with composite materials

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 sphe...

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Bibliographic Details
Published inOptical and quantum electronics Vol. 48; no. 12; pp. 1 - 10
Main Authors Keshavarz, M., Rostami, A., Dolatyari, M., Rostami, G., Khosravi, S.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.12.2016
Springer Nature B.V
Subjects
Broadband
Characterization and Evaluation of Materials
Composite materials
Computer Communication Networks
Core-shell particles
Electrical Engineering
Lasers
Metamaterials
Nanoparticles
Nanospheres
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Plastic foam
Refractivity
Visible spectrum
Visible spectrum
Superposition
Spherical nanoparticles
Effective medium
Negative refractive index
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Summary: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.
ISSN:0306-8919
1572-817X
DOI:10.1007/s11082-016-0797-2