Modified Brewster angle on conducting 2D materials

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Résumé

Insertion of two-dimensional (2D) materials in optical systems modifies their electrodynamical response. In particular, the Brewster angle undergoes an up-shift if a substrate is covered with a conducting 2D material. This work theoretically and experimentally investigates this effect related to the 2D induced current at the interface. The shift is predicted for all conducting 2D materials and tunability with respect to the Fermi level of graphene is evidenced. Analytical approximations for high and low 2D conductivities are proposed and avoid cumbersome numerical analysis of experimental data. Experimental demonstration using spectroscopic ellipsometry has been performed in the UV to NIR range on mono-, bi- and trilayer graphene samples. The non-contact measurement of this modified Brewster angle allows to deduce the optical conductivity of 2D materials. Applications to telecommunication technologies can be considered thanks to the tunability of the shift at 1.55 μm.
langue originaleAnglais
Numéro d'article025007
Nombre de pages8
journal2D Materials
Volume5
Numéro de publication2
Les DOIs
étatPublié - 30 janv. 2018

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Brewster angle
conduction
Graphite
shift
graphene
Graphene
low conductivity
Optical conductivity
ellipsometry
numerical analysis
Spectroscopic ellipsometry
telecommunication
insertion
Induced currents
Fermi level
Optical systems
Telecommunication
Numerical analysis
conductivity
Demonstrations

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    title = "Modified Brewster angle on conducting 2D materials",
    abstract = "Insertion of two-dimensional (2D) materials in optical systems modifies their electrodynamical response. In particular, the Brewster angle undergoes an up-shift if a substrate is covered with a conducting 2D material. This work theoretically and experimentally investigates this effect related to the 2D induced current at the interface. The shift is predicted for all conducting 2D materials and tunability with respect to the Fermi level of graphene is evidenced. Analytical approximations for high and low 2D conductivities are proposed and avoid cumbersome numerical analysis of experimental data. Experimental demonstration using spectroscopic ellipsometry has been performed in the UV to NIR range on mono-, bi- and trilayer graphene samples. The non-contact measurement of this modified Brewster angle allows to deduce the optical conductivity of 2D materials. Applications to telecommunication technologies can be considered thanks to the tunability of the shift at 1.55 μm.",
    keywords = "2D conducting materials, Brewster angle, conductivity, graphene, non-contact measurement",
    author = "Bruno Majerus and Mirko Cormann and Nicolas Reckinger and Matthieu Paillet and Luc Henrard and Philippe Lambin and Lobet, {Micha L.}",
    year = "2018",
    month = "1",
    day = "30",
    doi = "10.1088/2053-1583/aaa574",
    language = "English",
    volume = "5",
    journal = "2D Materials",
    issn = "2053-1583",
    publisher = "IOP Publishing Ltd.",
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    }

    Modified Brewster angle on conducting 2D materials. / Majerus, Bruno; Cormann, Mirko; Reckinger, Nicolas; Paillet, Matthieu; Henrard, Luc; Lambin, Philippe; Lobet, Micha L.

    Dans: 2D Materials, Vol 5, Numéro 2, 025007, 30.01.2018.

    Résultats de recherche: Contribution à un journal/une revueArticle

    TY - JOUR

    T1 - Modified Brewster angle on conducting 2D materials

    AU - Majerus, Bruno

    AU - Cormann, Mirko

    AU - Reckinger, Nicolas

    AU - Paillet, Matthieu

    AU - Henrard, Luc

    AU - Lambin, Philippe

    AU - Lobet, Micha L.

    PY - 2018/1/30

    Y1 - 2018/1/30

    N2 - Insertion of two-dimensional (2D) materials in optical systems modifies their electrodynamical response. In particular, the Brewster angle undergoes an up-shift if a substrate is covered with a conducting 2D material. This work theoretically and experimentally investigates this effect related to the 2D induced current at the interface. The shift is predicted for all conducting 2D materials and tunability with respect to the Fermi level of graphene is evidenced. Analytical approximations for high and low 2D conductivities are proposed and avoid cumbersome numerical analysis of experimental data. Experimental demonstration using spectroscopic ellipsometry has been performed in the UV to NIR range on mono-, bi- and trilayer graphene samples. The non-contact measurement of this modified Brewster angle allows to deduce the optical conductivity of 2D materials. Applications to telecommunication technologies can be considered thanks to the tunability of the shift at 1.55 μm.

    AB - Insertion of two-dimensional (2D) materials in optical systems modifies their electrodynamical response. In particular, the Brewster angle undergoes an up-shift if a substrate is covered with a conducting 2D material. This work theoretically and experimentally investigates this effect related to the 2D induced current at the interface. The shift is predicted for all conducting 2D materials and tunability with respect to the Fermi level of graphene is evidenced. Analytical approximations for high and low 2D conductivities are proposed and avoid cumbersome numerical analysis of experimental data. Experimental demonstration using spectroscopic ellipsometry has been performed in the UV to NIR range on mono-, bi- and trilayer graphene samples. The non-contact measurement of this modified Brewster angle allows to deduce the optical conductivity of 2D materials. Applications to telecommunication technologies can be considered thanks to the tunability of the shift at 1.55 μm.

    KW - 2D conducting materials

    KW - Brewster angle

    KW - conductivity

    KW - graphene

    KW - non-contact measurement

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    U2 - 10.1088/2053-1583/aaa574

    DO - 10.1088/2053-1583/aaa574

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