Two-Step Excitation Triggered by One-Photon Absorption on Linear Dispersion in Monolayer Graphene

Takeshi Koyama, Kenta Mizutani, Hiroki Ago, Hideo Kishida

    Research output: Contribution to journalArticle

    Abstract

    We report the decrease in absorption caused by a near-infrared laser pulse in the visible region in monolayer graphene. This absorption decrease shows the existence of a two-step excitation process of carriers, in which one-photon absorption and Auger recombination sequentially occur. This process results from the linear dispersion nature of monolayer graphene. In addition, the monolayer graphene shows the ultrafast decay of carrier population. The observed properties are of importance for ultrafast optical switching utilizing the optical nonlinearity induced by carrier excitation.

    Original languageEnglish
    Pages (from-to)11225-11229
    Number of pages5
    JournalJournal of Physical Chemistry C
    Volume120
    Issue number20
    DOIs
    Publication statusPublished - May 26 2016

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    Graphite
    Graphene
    Monolayers
    graphene
    Photons
    photons
    excitation
    Infrared lasers
    optical switching
    infrared lasers
    Laser pulses
    nonlinearity
    decay
    pulses

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Energy(all)
    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films

    Cite this

    Two-Step Excitation Triggered by One-Photon Absorption on Linear Dispersion in Monolayer Graphene. / Koyama, Takeshi; Mizutani, Kenta; Ago, Hiroki; Kishida, Hideo.

    In: Journal of Physical Chemistry C, Vol. 120, No. 20, 26.05.2016, p. 11225-11229.

    Research output: Contribution to journalArticle

    Koyama, Takeshi ; Mizutani, Kenta ; Ago, Hiroki ; Kishida, Hideo. / Two-Step Excitation Triggered by One-Photon Absorption on Linear Dispersion in Monolayer Graphene. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 20. pp. 11225-11229.
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