Broadband Negative Refractive Index in the Visible Spectrum

M. Keshavarz, S. Khosravi, A. Rostami, G. Rostami, M. Dolatyari

2015

Abstract

In this paper, a composite medium based metamaterial with random distribution of nanoparticles in vacuum host to achieve negative effective refractive index in the visible wavelength range is suggested for invisibility purposes. Our calculations show that structures including single metal (dielectric) spheres and core-shell structures with metallic core and dielectric shell, which consists two-layer particles with uniform sizes cannot support negative effective refractive index. For this purpose the structures consist of two-layer nanospheres with different sizes and fill fraction has been proposed. Since, band width of negative refractive index is narrow, the three layer nanospheres has been studied and investigated. We show that in this case with increasing the refractive index of middle and outer layers, negative value of effective refractive index can be increased. Also, we show that using different sizes of nanomaterials in host medium, band width is increased. Finally, superposition of three layer spherical nanoparticles with different outer radius and applied single doped semiconductor spheres, has been proposed. We show that Band width with negative permittivity and permeability can be optimized.

Paper Citation

in Harvard Style

Keshavarz M., Khosravi S., Rostami A., Rostami G. and Dolatyari M. (2015). Broadband Negative Refractive Index in the Visible Spectrum . In Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 2: PHOTOPTICS, ISBN 978-989-758-093-2, pages 113-117. DOI: 10.5220/0005337601130117

in Bibtex Style

@conference{photoptics15,
author={M. Keshavarz and S. Khosravi and A. Rostami and G. Rostami and M. Dolatyari},
title={Broadband Negative Refractive Index in the Visible Spectrum},
booktitle={Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 2: PHOTOPTICS,},
year={2015},
pages={113-117},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005337601130117},
isbn={978-989-758-093-2},
}

in EndNote Style

TY - CONF
JO - Proceedings of the 3rd International Conference on Photonics, Optics and Laser Technology - Volume 2: PHOTOPTICS,
TI - Broadband Negative Refractive Index in the Visible Spectrum
SN - 978-989-758-093-2
AU - Keshavarz M.
AU - Khosravi S.
AU - Rostami A.
AU - Rostami G.
AU - Dolatyari M.
PY - 2015
SP - 113
EP - 117
DO - 10.5220/0005337601130117