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

Taeyong Chang, Jong Uk Kim, Seung Kyu Kang, Hyowook Kim, Do Kyung Kim, Yong-Hee Lee () and Jonghwa Shin ()
Additional contact information
Taeyong Chang: KAIST
Jong Uk Kim: KAIST
Seung Kyu Kang: KAIST
Hyowook Kim: KAIST
Do Kyung Kim: KAIST
Yong-Hee Lee: KAIST
Jonghwa Shin: KAIST

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract 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 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.

Date: 2016
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DOI: 10.1038/ncomms12661

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