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Realization of broadband negative refraction in visible range using vertically stacked hyperbolic metamaterials.


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.

SUBMITTER: Bang S 

PROVIDER: S-EPMC6773722 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Realization of broadband negative refraction in visible range using vertically stacked hyperbolic metamaterials.

Bang Sanghun S   So Sunae S   Rho Junsuk J  

Scientific reports 20191001 1


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 a  ...[more]

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