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🆕 Date Issued:
2013-06-06
🗄 In DepositOnce:2020-02-27
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Spatial mapping of exciton lifetimes in single ZnO nanowires

Reparaz, Juan Sebastian; Callsen, Gordon; Wagner, Markus R.; Güell, F.; Morante, Joan Ramon; Sotomayor Torres, Clivia M.; Hoffmann, Axel

We investigate the spatial dependence of the exciton lifetimes in single ZnO nanowires. We have found that the free exciton and bound exciton lifetimes exhibit a maximum at the center of nanowires, while they decrease by 30% towards the tips. This dependence is explained by considering the cavity-like properties of the nanowires in combination with the Purcell effect. We show that the lifetime of the bound-excitons scales with the localization energy to the power of 3/2, which validates the model of Rashba and Gurgenishvili at the nanoscale.
nanowiresPurcell effectlifetimespatial mapping
Published in: APL Materials, 10.1063/1.4808441, American Institute of Physics (AIP)
Creative Commons Attribution 4.0 (CC BY)Creative Commons Attribution 4.0 (CC BY)
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