Angle-selective perfect absorption with two-dimensional materials
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Hu_Angle-selective.pdf
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Author(s)
Zhu, Linxiao
Liu, Fengyuan
Lin, Hongtao
Hu, Juejun
Yu, Zongfu
Wang, Xinran
Fan, Shanhui
Date Issued
December 2015
Journal
Light: Science & Applications
Publisher
Springer Nature
Citation
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
Version
Final published version
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 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.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1038/LSA.2016.52
