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- Title
Broadband graphene polarizer.
- Authors
Qiaoliang Bao; Han Zhang; Bing Wang; Zhenhua Ni; Candy Haley Yi Xuan Lim; Yu Wang; Ding Yuan Tang; Kian Ping Loh
- Abstract
Conventional polarizers can be classified into three main modes of operation: sheet polarizer using anisotropic absorption media, prism polarizer by refraction and Brewster-angle polarizer by reflection. These polarizing components are not easily integrated with photonic circuits. The in-line fibre polarizer, which relies on polarization-selective coupling between the evanescent field and birefringent crystal or metal, is a promising alternative because of its compatibility with most fibre-optic systems. Here, we demonstrate the operation of a broadband fibre polarizer based on graphene, an ultrathin two-dimensional carbon material. The out-coupled light in the telecommunication band shows a strong s-polarization effect with an extinction ratio of 27 dB. Unlike polarizers made from thin metal film, a graphene polarizer can support transverse-electric-mode surface wave propagation due to its linear dispersion of Dirac electrons.
- Subjects
POLARIZERS (Light); OPTICAL polarization; REFRACTION (Optics); FIBER optics; PHOTONICS; TELECOMMUNICATION
- Publication
Nature Photonics, 2011, Vol 5, Issue 7, p411
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2011.102