The ultrafast carrier dynamics of epitaxial ZnO and BaTiO3 thin films after intense excitation at
3.10 eV and 4.66 eV photon energy has been studied by femtosecond absorption spectroscopy.
Modelling the transient transmission changes on the basis of spectroscopic ellipsometry data and
pertinent equilibrium model dielectric functions extended by additional terms for the effects at high
carrier density (P-band luminescence and stimulated emission from electron-hole-plasma), a
self-consistent parameterized description was obtained for both materials. Excited carrier lifetimes
in the range of ≈2 to ≈60 ps and long-lived thermal effects after several hundred ps have been
identified in both materials. These findings form a reliable basis to quantitatively describe future
femtosecond studies on ZnO/BaTiO3 heterolayer systems.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:31231 |
| Date | 14 August 2018 |
| Creators | Acharya, Snigdhatanu, Chouthe, Sumedha, Graener, Heinrich, Böntgen, Tammo, Sturm, Chris, Schmidt-Grund, Rüdiger, Grundmann, Marius, Seifert, Gerhard |
| Contributors | Martin-Luther-Universität Halle-Wittenberg |
| Publisher | American Institute of Physics, Universität Leipzig |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 0021-8979, 1089-7550, 053508 |
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