Broadband giant-refractive-index material based on mesoscopic space-filling curves

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The refractive index is the fundamental property of all optical materials and dictates Snell's law, propagation speed, wavelength, diffraction, energy density, absorption and emission of light in materials. Experimentally realized broadband refractive indices remain < 40, even with intricately designed artificial media. Herein, we demonstrate a measured index > 1,800 resulting from a mesoscopic crystal with a dielectric constant greater than three million. This gigantic enhancement effect originates from the space-filling curve concept from mathematics. The principle is inherently very broad band, the enhancement being nearly constant from zero up to the frequency of interest. This broadband giant-refractive-index medium promises not only enhanced resolution in imaging and raised fundamental absorption limits in solar energy devices, but also compact, power-efficient components for optical communication and increased performance in many other applications
Publisher
NATURE PUBLISHING GROUP
Issue Date
2016-08
Language
English
Article Type
Article
Keywords

METAMATERIALS; LENSES; WAVES; LIGHT; SLIT

Citation

NATURE COMMUNICATIONS, v.7

ISSN
2041-1723
DOI
10.1038/ncomms12661
URI
http://hdl.handle.net/10203/214002
Appears in Collection
MS-Journal Papers(저널논문)PH-Journal Papers(저널논문)
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