Electrically Tunable Goos-Hänchen Effect with Graphene in the Terahertz Regime
Journal Article
·
· Advanced Optical Materials
- 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
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
- Tongji Univ., Shanghai (China). Key Lab. of Advanced Micro-structure Materials (MOE) and School of Physics Science and Engineering
- Tsinghua Univ., Beijing (China). State Key Lab. of Tribology, Dept. of Mechanical Engineering
- Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy; Inst. of Electronic Structure and Laser (FORTH), Crete (Greece)
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.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- European Research Council (ERC); National Science Foundation of China (NSFC); US Office of Naval Research; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1347893
- Report Number(s):
- IS-J--9229
- Journal Information:
- Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 11 Vol. 4; ISSN 2195-1071
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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