Angle-selective perfect absorption with two-dimensional materials
Author(s)Zhu, Linxiao; Liu, Fengyuan; Lin, Hongtao; Hu, Juejun; Yu, Zongfu; Wang, Xinran; Fan, Shanhui; ... Show more Show less
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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 μm), 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.
DepartmentMassachusetts Institute of Technology. Department of Materials Science and Engineering
Light: Science & Applications
Zhu, Linxiao, et al. “Angle-Selective Perfect Absorption with Two-Dimensional Materials.” Light: Science & Applications 5, 3 (December 2015): e16052 © 2017 Changchun Institute of Optics, Fine Mechanics and Physics
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