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|Title:||Broadband graphene polarizer||Authors:||Bao, Q.
|Issue Date:||Jul-2011||Citation:||Bao, Q., Zhang, H., Wang, B., Ni, Z., Lim, C.H.Y.X., Wang, Y., Tang, D.Y., Loh, K.P. (2011-07). Broadband graphene polarizer. Nature Photonics 5 (7) : 411-415. ScholarBank@NUS Repository. https://doi.org/10.1038/nphoton.2011.102||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. © 2011 Macmillan Publishers Limited. All rights reserved.||Source Title:||Nature Photonics||URI:||http://scholarbank.nus.edu.sg/handle/10635/63555||ISSN:||17494885||DOI:||10.1038/nphoton.2011.102|
|Appears in Collections:||Staff Publications|
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