Angle-selective perfect absorption with two-dimensional materials

Linxiao Zhu, Fengyuan Liu, Hongtao Lin, Juejun Hu, Zongfu Yu, Xinran Wang, Shanhui Fan

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

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.

Original languageEnglish (US)
Article numbere16052
JournalLight: Science and Applications
Volume5
Issue number3
DOIs
StatePublished - 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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