Transient terahertz conductivity of GaAs nanowires

Patrick Parkinson, James Lloyd-Hughes, Qiang Gao, H Hoe Tan, Chennupati Jagadish, Michael B Johnston, Laura M Herz

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The time-resolved conductivity of isolated GaAs nanowires is investigated by optical-pump terahertz-probe time-domain spectroscopy. The electronic response exhibits a pronounced surface plasmon mode that forms within 300 fs before decaying within 10 ps as a result of charge trapping at the nanowire surface. The mobility is extracted using the Drude model for a plasmon and found to be remarkably high, being roughly one-third of that typical for bulk GaAs at room temperature.
    Original languageEnglish
    Pages (from-to)2162-2165
    Number of pages4
    JournalNano Letters
    Volume7
    Issue number7
    DOIs
    Publication statusPublished - 27 Jun 2007

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