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Title: Electrically Tunable Goos-Hänchen Effect with Graphene in the Terahertz Regime

Goos-Hänchen (G-H) effect is of great interest in the manipulation of optical beams. However, it is still fairly challenging to attain efficient controls of the G-H shift for diverse applications. Here, we propose a mechanism to realize tunable G-H shift in the terahertz regime with electrically controllable graphene. Taking monolayer graphene covered epsilon-near-zero metamaterial as a planar model system, it is found that the G-H shift for the orthogonal s-polarized and p-polarized terahertz beams at oblique incidence are positive and negative, respectively. The G-H shift can be modified substantially by electrically controlling the Fermi energy of the monolayer graphene. Reversely, the Fermi energy dependent G-H effect can also be used as a strategy for measuring the doping level of graphene. In addition, the G-H shifts of the system are of strong frequency-dependence at oblique angles of incidence, therefore the proposed graphene hybrid system can potentially be used for the generation of terahertz “rainbow”, a flat analog of the dispersive prism in optics. The proposed scheme of hybrid system involving graphene for dynamic control of G-H shift will have potential applications in the manipulation of terahertz waves.
 [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [4] ;  [1] ;  [2] ;  [2] ;  [5]
  1. Northwestern Polytechnical Univ., Xi'an (China). Key Lab. of Space Applied Physics and Chemistry, Ministry of Education and Dept. of Applied Physics, School of Science
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
  3. Tongji Univ., Shanghai (China). Key Lab. of Advanced Micro-structure Materials (MOE) and School of Physics Science and Engineering
  4. Tsinghua Univ., Beijing (China). State Key Lab. of Tribology, Dept. of Mechanical Engineering
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy; Inst. of Electronic Structure and Laser (FORTH), Crete (Greece)
Publication Date:
Report Number(s):
Journal ID: ISSN 2195-1071
Grant/Contract Number:
AC02-07CH11358; N00014-14-1-0474; 61505164; 61275176; 11372248; 11404213; 3102015ZY079; 3102015ZY058; 320081
Accepted Manuscript
Journal Name:
Advanced Optical Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 11; Journal ID: ISSN 2195-1071
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); US Office of Naval Research; European Research Council (ERC); National Science Foundation of China (NSFC)
Country of Publication:
United States
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; graphene; metamaterials; surface conductivity; Goos-Hänchen shift; terahertz; tunability
OSTI Identifier: