naa a22 4500 510817823 CHVBK 20180411083516.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-012-9459-9 doi (NATIONALLICENCE)springer-10.1007/s11468-012-9459-9 Plasmonic Control of Near-Interface Exciton Dynamics in Defect-Rich ZnO Thin Films [Elektronische Daten] [B. Lawrie, R. Mu, R. F. Haglund] Zinc oxide (ZnO) is an attractive material for many electro-optical applications, but the control of impurities remains an issue in device fabrication. For this paper, the dynamics of defect states produced by annealing ZnO thin films at temperatures of 400-800 °C were probed by band-edge pump-probe spectroscopy in differential reflection and transmission. The distinction between the differential reflection and transmission spectra allowed for the analysis of ultrafast near-interface dynamics, which cannot be separated from the bulk thin-film dynamics by traditional ultrafast spectroscopies. In particular, simultaneous differential reflection and transmission spectroscopy provided clear evidence that the band-edge recombination dynamics in samples annealed at 400 °C were absent near the ZnO/substrate interface. However, the Purcell enhancement observed in Ag/ZnO heterostructures resulted in the dramatic emergence of the band-edge recombination signal nearly two orders of magnitude greater in intensity than the defect differential reflectivity. This indicates that the spatial range of the Purcell effect is at least twice as large as inferred from previous photoluminescence studies. Springer Science+Business Media New York, 2012 Purcell effect nationallicence Ultrafast spectroscopy nationallicence Interface defects nationallicence Lawrie B. Interdisciplinary Materials Science Program, Vanderbilt University, 37234-0106, Nashville, TN, USA aut Mu R. Department of Physics, Fisk University, 1000 17th Ave. North, 37208, Nashville, TN, USA aut Haglund R. F. Department of Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, 37235-1807, Nashville, TN, USA aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 693-697 1557-1955 8:2<693 2013 8 11468 https://doi.org/10.1007/s11468-012-9459-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-012-9459-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lawrie B. Interdisciplinary Materials Science Program, Vanderbilt University, 37234-0106, Nashville, TN, USA aut NATIONALLICENCE 700 1- Mu R. Department of Physics, Fisk University, 1000 17th Ave. North, 37208, Nashville, TN, USA aut NATIONALLICENCE 700 1- Haglund R. F. Department of Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, 37235-1807, Nashville, TN, USA aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 693-697 1557-1955 8:2<693 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer