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Transient Rayleigh scattering: A new probe of picosecond carrier dynamics in a single semiconductor nanowire

Montazeri, Mohammad; Jackson, Howard E; Smith, Leigh M; Yarrison-Rice, Jan M; Kang, Jung-Hyun; Gao, Qiang; Jagadish, Chennupati; Tan, Hark Hoe

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Using a new technique, transient Rayleigh scattering, we show that measurements from a single GaAs/AlGaAs core-shell semiconductor nanowire provide sensitive and detailed information on the time evolution of the density and temperature of the electrons and holes after photoexcitation by an intense laser pulse. Through band filling, band gap renormalization, and plasma screening, the presence of a dense and hot electron-hole plasma directly influences the real and imaginary parts of the complex...[Show more]

dc.contributor.authorMontazeri, Mohammad
dc.contributor.authorJackson, Howard E
dc.contributor.authorSmith, Leigh M
dc.contributor.authorYarrison-Rice, Jan M
dc.contributor.authorKang, Jung-Hyun
dc.contributor.authorGao, Qiang
dc.contributor.authorJagadish, Chennupati
dc.contributor.authorTan, Hark Hoe
dc.date.accessioned2015-12-10T23:24:53Z
dc.identifier.issn1530-6984
dc.identifier.urihttp://hdl.handle.net/1885/67391
dc.description.abstractUsing a new technique, transient Rayleigh scattering, we show that measurements from a single GaAs/AlGaAs core-shell semiconductor nanowire provide sensitive and detailed information on the time evolution of the density and temperature of the electrons and holes after photoexcitation by an intense laser pulse. Through band filling, band gap renormalization, and plasma screening, the presence of a dense and hot electron-hole plasma directly influences the real and imaginary parts of the complex index of refraction that in turn affects the spectral dependence of the Rayleigh scattering cross-section in well-defined ways. By measuring this spectral dependence as a function of time, we directly determine the thermodynamically independent density and temperature of the electrons and holes as a function of time after pulsed excitation as the carriers thermalize to the lattice temperature. We successfully model the results by including ambipolar transport, recombination, and cooling through optic and acoustic phonon emission that quantify the hole mobility at ∼68,000 cm 2/V·s, linear decay constant at 380 ps, bimolecular recombination rate at 4.8 × 10 -9 cm 3/s and the energy-loss rate of plasma due to optical and acoustic phonon emission.
dc.publisherAmerican Chemical Society
dc.sourceNano Letters
dc.subjectKeywords: Acoustic phonons; Ambipolar transport; Band fillings; Band gap renormalization; Bimolecular recombination; Carrier cooling; Carrier dynamics; Complex index of refraction; Core-shell; Decay constants; Electron hole plasma; Electrons and holes; Energy-loss carrier cooling; carrier dynamics; Nanowire; transient Rayleigh scattering
dc.titleTransient Rayleigh scattering: A new probe of picosecond carrier dynamics in a single semiconductor nanowire
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume12
dc.date.issued2012
local.identifier.absfor091203 - Compound Semiconductors
local.identifier.absfor020406 - Surfaces and Structural Properties of Condensed Matter
local.identifier.ariespublicationf5625xPUB1448
local.type.statusPublished Version
local.contributor.affiliationMontazeri, Mohammad, University of Cincinnati
local.contributor.affiliationJackson, Howard E , University of Cincinnati
local.contributor.affiliationSmith, Leigh M , University of Cincinnati
local.contributor.affiliationYarrison-Rice, Jan M , University of Miami
local.contributor.affiliationKang, Jung-Hyun, College of Physical and Mathematical Sciences, ANU
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.description.embargo2037-12-31
local.bibliographicCitation.issue10
local.bibliographicCitation.startpage5389
local.bibliographicCitation.lastpage5395
local.identifier.doi10.1021/nl302767u
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T08:46:56Z
local.identifier.scopusID2-s2.0-84867477847
local.identifier.thomsonID000309615000052
CollectionsANU Research Publications

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