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Plasmonics

, Volume 13, Issue 4, pp 1153–1158 | Cite as

Broadband Terahertz Absorption in Graphene-Embedded Photonic Crystals

  • Yuancheng Fan
  • Luqi Tu
  • Fuli Zhang
  • Quanhong Fu
  • Zhengren Zhang
  • Zeyong Wei
  • Hongqiang Li
Article

Abstract

The absorption in graphene is rather low at terahertz frequencies. Here, we present a graphene-embedded photonic crystal structure to realize broadband terahertz absorption in graphene. The approach provides absorption enhancement in the whole terahertz regime (from 0.1 to 10 THz). It is shown that the average absorption in the graphene-embedded photonic crystal can be enhanced in the multiple propagating bands of the photonic crystals. The absorption efficiency can be further improved by optimizing the characteristic frequency, optical thickness ratio in a unit cell, and the angle of incidence on the photonic crystals. A maximum broadband absorption factor of 28.8% was achieved for fixed alternative dielectric materials. The graphene-embedded photonic crystal is promising for terahertz functional devices with broadband response.

Keywords

Graphene Photonic crystals Terahertz absorption Surface conductivity 

Notes

Acknowledgements

The authors would like to acknowledge financial support from the National Science Foundation of China (NSFC) (Grants No. 11674266, 11372248, 61505164, 11404213, 11674248, 11504034), the Program for Scientific Activities of Selected Returned Overseas Professionals in Shaanxi Province, the Shaanxi Project for Young New Star in Science and Technology (Grant No. 2015KJXX-11), the Fundamental Research Funds for the Central Universities, the Chongqing Research Program of Basic Research and Frontier Technology (Grant No. cstc2016jcyjA0186), and the Scientific and Technological Research Program of Chongqing Municipal Education Commission (Grant No. KJ1600515).

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Department of Applied Physics, School of ScienceNorthwestern Polytechnical UniversityXi’anChina
  2. 2.School of Materials Science and EngineeringChongqing Jiaotong UniversityChongqingChina
  3. 3.Key Laboratory of Advanced Micro-structure Materials (MOE) and Department of PhysicsTongji UniversityShanghaiChina
  4. 4.The Institute of Dongguan-Tongji UniversityDongguanChina
  5. 5.National Laboratory for Infrared PhysicsShanghai Institute of Technical Physics, Chinese Academy of ScienceShanghaiChina

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