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Transient Terahertz Conductivity of GaAs Nanowires

Parkinson, Patrick Wallace; Lloyd-Hughes, J; Gao, Qiang; Jagadish, Chennupati; Johnston, Michael B; Herz, Laura; Tan, Hark Hoe

Description

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.

dc.contributor.authorParkinson, Patrick Wallace
dc.contributor.authorLloyd-Hughes, J
dc.contributor.authorGao, Qiang
dc.contributor.authorJagadish, Chennupati
dc.contributor.authorJohnston, Michael B
dc.contributor.authorHerz, Laura
dc.contributor.authorTan, Hark Hoe
dc.date.accessioned2015-12-07T22:27:15Z
dc.identifier.issn1530-6984
dc.identifier.urihttp://hdl.handle.net/1885/21808
dc.description.abstractThe 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.
dc.publisherAmerican Chemical Society
dc.sourceNano Letters
dc.subjectKeywords: Electric charge; Mathematical models; Semiconducting gallium arsenide; Thermal effects; Drude model; Nanowire surface; Time-domain spectroscopy; Nanowires
dc.titleTransient Terahertz Conductivity of GaAs Nanowires
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume7
dc.date.issued2007
local.identifier.absfor100799 - Nanotechnology not elsewhere classified
local.identifier.ariespublicationu8709800xPUB18
local.type.statusPublished Version
local.contributor.affiliationParkinson, Patrick Wallace, University of Oxford
local.contributor.affiliationLloyd-Hughes, J, University of Oxford
local.contributor.affiliationGao, Qiang, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTan, Hoe Hark, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJagadish, Chennupati, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJohnston, Michael B, University of Oxford
local.contributor.affiliationHerz, Laura, University of Oxford
local.description.embargo2037-12-31
local.bibliographicCitation.issue7
local.bibliographicCitation.startpage2162
local.bibliographicCitation.lastpage2165
local.identifier.doi10.1021/nl071162x
dc.date.updated2015-12-07T09:51:07Z
local.identifier.scopusID2-s2.0-34547569089
CollectionsANU Research Publications

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