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Journal of Applied Physics / Volume 108 / Issue 10 / COMMUNICATIONS

J. Appl. Phys. 108, 106101 (2010); http://dx.doi.org/10.1063/1.3496619 (3 pages)

High contrast optical detection of single graphenes on optically transparent substrates

M. Dorn, P. Lange, A. Chekushin, N. Severin, and J. P. Rabe

Department of Physics, Humboldt-Universität zu Berlin, Newtonstr. 15, D-12489 Berlin, Germany

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(Received 27 April 2010; accepted 30 August 2010; published online 16 November 2010)

The use of graphenes relies largely on their optical detection with Fabry–Pérot type structures. We demonstrate here that optical reflection mode imaging with single graphenes on the bottom of a bare transparent substrate such as mica can provide a high contrast of more than 12% for visible light. This can be explained with the destructive interference of light reflected from the substrate-graphene and graphene-air interfaces, similarly to black soap films. Since the contrast is only weakly wavelength dependent, white light contrast of single graphenes is sufficiently high to be easily detected with a human eye. We argue that with the graphene on the bottom of the transparent substrate high contrasts for single graphenes can also be achieved on other transparent substrates exhibiting a broad range of refractive indices.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

graphene, light reflection, reflectivity, refractive index

PACS

  • 78.67.Wj

    Optical properties of graphene

  • 78.20.Ci

    Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

  • 61.48.Gh

    Structure of graphene

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3496619

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    P. Blake, E. W. Hill, A. H. Castro Neto, K. S. Novoselov, D. Jiang, R. Yang, T. J. Booth, and A. K. Geim, Appl. Phys. Lett. 91, 063124 (2007)APPLAB000091000006063124000001.

    P. E. Gaskell, H. S. Skulason, C. Rodenchuk, and T. Szkopek, Appl. Phys. Lett. 94, 143101 (2009)APPLAB000094000014143101000001.

    B. Krauss, T. Lohmann, D. -H. Chae, M. Haluska, K. von Klitzing, and J. H. Smet, Phys. Rev. B 79, 165428 (2009).


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