Realization of broadband negative refraction in visible range using vertically stacked hyperbolic metamaterials
SCIE
SCOPUS
- Title
- Realization of broadband negative refraction in visible range using vertically stacked hyperbolic metamaterials
- Authors
- Bang, Sanghun; SO, SUN AE; Rho, Junsuk
- Date Issued
- 2019-10
- Publisher
- NATURE PUBLISHING GROUP
- Abstract
- Negative refraction has generated much interest recently with its unprecedented optical phenomenon. However, a broadband negative refraction has been challenging because they mainly involve optical resonances. This paper reports the realization of broadband negative refraction in the visible spectrum by using vertically-stacked metal-dielectric multilayer structures. Such structure exploits the characteristics of the constituent metal and dielectric materials, and does not require resonance to achieve negative refraction. Broadband negative refraction (wavelength 270-1300 nm) is numerically demonstrated. Compared to conventional horizontally-stacked multilayer structures, the vertically-stacked multilayer structure has a broader range of working wavelength in the visible range, with higher transmittance. We also report a variety of material combinations with broad working wavelength. The broadband negative refraction metamaterial provides an effective way to manipulate light and may have applications in super-resolution imaging, and invisibility cloaks.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/101846
- DOI
- 10.1038/s41598-019-50434-3
- ISSN
- 2045-2322
- Article Type
- Article
- Citation
- SCIENTIFIC REPORTS, vol. 9, no. 14093, 2019-10
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