Interaction between O2 and ZnO films probed by time-dependent second-harmonic generation

S.V. Andersen, V. Vandalon, B.W.H. Loo, van de, R.H.E.C. Bosch, K. Pedersen, W.M.M. Kessels

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

The interaction between O2 and ZnO thin films prepared by atomic layer deposition has been investigated by time-dependent second-harmonic generation, by probing the electric field induced by adsorbed oxygen molecules on the surface. The second-harmonic generated signal decays upon laser exposure due to two-photon assisted desorption of O2. Blocking and unblocking the laser beam for different time intervals reveals the adsorption rate of O2 onto ZnO. The results demonstrate that electric field induced second-harmonic generation provides a versatile non-contact probe of the adsorption kinetics of molecules on ZnO thin films.
Original languageEnglish
Article number051602
Number of pages5
JournalApplied Physics Letters
Volume104
DOIs
Publication statusPublished - 2014

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