physica status solidi (b) · 2004 · 34 citations · 12 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOptoelectronicsSemiconductor MaterialsLuminescent MaterialsNonlinear Optical MaterialsOptical Properties Of SemiconductorsOptical Properties Of SolidsOxide SemiconductorsThin Film Optical PropertiesEpitaxial MaterialsExcitonsGainMetalorganic Vapor Phase EpitaxyMolecular Beam EpitaxyOptical Emission SpectraPhotoluminescencePhotoluminescence Spectroscopy
Abstract We investigate ZnO epitaxial layers grown by MBE (Molecular Beam Epitaxy) and MOVPE (Metal Organic Vapor Phase Epitaxy) techniques. The samples show similar optical behavior in temperature dependent photoluminescence measurements, reflection and photoluminescence excitation spectroscopy in the low density regime. High excitation measurements show different behavior. While the MBE sample leads to stimulated emission from the exciton‐exciton‐scattering, an electron hole plasma is formed in the MOVPE sample which leads to stimulated emission at higher excitation intensities. The gain value measured by the variable stripe length method is much higher for the MBE grown sample. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Optically pumped lasing of ZnO at room temperature
Darren M. Bagnall, Y. F. Chen, Z. Q. Zhu et al. · Applied Physics Letters · 1997 · 2.2K citations