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Angle-selective perfect absorption with two-dimensional materials.

ABSTRACT: Two-dimensional (2D) materials have great potential in photonic and optoelectronic devices. However, the relatively weak light absorption in 2D materials hinders their application in practical devices. Here, we propose a general approach to achieve angle-selective perfect light absorption in 2D materials. As a demonstration of the concept, we experimentally show giant light absorption by placing large-area single-layer graphene on a structure consisting of a chalcogenide layer atop a mirror and achieving a total absorption of 77.6% in the mid-infrared wavelength range (~13??m), where the graphene contributes a record-high 47.2% absorptivity of mid-infrared light. Construction of such an angle-selective thin optical element is important for solar and thermal energy harvesting, photo-detection and sensing applications. Our study points to a new opportunity to combine 2D materials with photonic structures to enable novel device applications.

SUBMITTER: Zhu L

PROVIDER: S-EPMC6059899 | biostudies-other | 2016 Mar

REPOSITORIES: biostudies-other

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Angle-selective perfect absorption with two-dimensional materials.

Zhu Linxiao L Liu Fengyuan F Lin Hongtao H Hu Juejun J Yu Zongfu Z Wang Xinran X Fan Shanhui S

Light, science & applications 20160325 3

Two-dimensional (2D) materials have great potential in photonic and optoelectronic devices. However, the relatively weak light absorption in 2D materials hinders their application in practical devices. Here, we propose a general approach to achieve angle-selective perfect light absorption in 2D materials. As a demonstration of the concept, we experimentally show giant light absorption by placing large-area single-layer graphene on a structure consisting of a chalcogenide layer atop a mirror and ...[more]

PMID: 30167153

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