000190194 001__ 190194
000190194 005__ 20180913062129.0
000190194 0247_ $$2doi$$a10.1063/1.4822345
000190194 022__ $$a0003-6951
000190194 02470 $$2ISI$$a000325284500079
000190194 037__ $$aARTICLE
000190194 245__ $$aCharge carrier generation, relaxation, and recombination in polytypic GaAs nanowires studied by photoluminescence excitation spectroscopy
000190194 269__ $$a2013
000190194 260__ $$aMelville$$bAmerican Institute of Physics$$c2013
000190194 300__ $$a5
000190194 336__ $$aJournal Articles
000190194 520__ $$aWe report results of a study of polytypic GaAs nanowires using low-temperature photoluminescence excitation spectroscopy. The nanowire ensemble shows a strong absorption at 1.517 eV, as a result of resonant generation of heavy-hole excitons in the zinc-blende segments of the nanowires. Excitons then diffuse along the length of the nanowire and are trapped by the type-II quantum discs arising from the zinc-blende/ wurtzite crystal structure alternation and recombine radiatively. Finally, experiments on single nanowires demonstrate that the energy of the Gamma(7) conduction band to Gamma(9) valence band exciton of wurtzite GaAs is 1.521 eV at 4K. (C) 2013 AIP Publishing LLC.
000190194 700__ $$aCorfdir, P.$$uUniv Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
000190194 700__ $$aVan Hattem, B.$$uUniv Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
000190194 700__ $$aUccelli, E.$$uEcole Polytech Fed Lausanne, Lab Mat Semicond, CH-1015 Lausanne, Switzerland
000190194 700__ $$0243742$$aFontcuberta I. Morral, A.$$g182447
000190194 700__ $$aPhillips, R. T.$$uUniv Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
000190194 773__ $$j103$$k13$$tApplied Physics Letters
000190194 8564_ $$s1482020$$uhttps://infoscience.epfl.ch/record/190194/files/Corfdir-APL2012.pdf$$yPublisher's version$$zPublisher's version
000190194 909C0 $$0252277$$pLMSC$$xU11832
000190194 909CO $$ooai:infoscience.tind.io:190194$$pSTI$$particle
000190194 917Z8 $$x182447
000190194 937__ $$aEPFL-ARTICLE-190194
000190194 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000190194 980__ $$aARTICLE