6533b7dafe1ef96bd126e290
RESEARCH PRODUCT
Polarized recombination of acoustically transported carriers in GaAs nanowires
Oliver BrandtHenning RiechertLutz GeelhaarMichael MöllerSteffen BreuerAndrés CantareroAlberto Hernández-mínguezMauricio M. De LimaPaulo V. SantosCarsten Pfüllersubject
Materials sciencePhotoluminescenceSurface acoustic wavesNanowireNanochemistryNanotechnologyElectronEnginyeria acústicaCharge transportMaterials Science(all)Spin transportPolarizationGeneral Materials SciencePhotoluminescenceWurtzite crystal structureNano Expressbusiness.industryNanowiresSurface acoustic waveGaAsCiència dels materialsPolarization (waves)Condensed Matter PhysicsPiezoelectricityOptoelectronicsbusinessdescription
: The oscillating piezoelectric field of a surface acoustic wave (SAW) is employed to transport photoexcited electrons and holes in GaAs nanowires deposited on a SAW delay line on a LiNbO3 crystal. The carriers generated in the nanowire by a focused light spot are acoustically transferred to a second location where they recombine. We show that the recombination of the transported carriers occurs in a zinc blende section on top of the predominant wurtzite nanowire. This allows contactless control of the linear polarized emission by SAWs which is governed by the crystal structure. Additional polarization-resolved photoluminescence measurements were performed to investigate spin conservation during transport.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 | Nanoscale Research Letters |