Applied Physics Letters · 1998 · 1.8K citations · 17 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsPhotonicsThin FilmsLuminescent MaterialsMetal Oxide NanomaterialsNanoelectronicsNanostructured Electronic MaterialsOxide SemiconductorsSemiconductor NanomaterialsNanostructured OxidesOptical GainOptical Gain In SemiconductorsOptical Gain MaterialsSelf-assembled Thin FilmsThin Oxide FilmsZinc Oxide NanostructuresZinc Oxides
The hexagonal facets of the ZnO microcrystallites naturally form Fabry–Pérot cavities, enabling lasing. The ZnO microcrystallites are grown by laser molecular beam epitaxy and self‑assemble into parallel arrays on sapphire substrates. Room‑temperature UV laser emission is achieved from the ZnO microcrystallite films, exhibiting excitonic optical gain an order of magnitude higher than bulk ZnO and marking a key advance toward nanometer photoelectronics.
Room-temperature ultraviolet (UV) laser emission of ZnO microcrystallite thin films is reported. The hexagonal ZnO microcrystallites are grown by laser molecular beam epitaxy. They are self-assembled and parallelly arrayed on sapphire substrates. The facets of the hexagons form natural Fabry–Pérot lasing cavities. The optical gain for the room-temperature UV stimulated emission is of an excitonic nature and has a peak value an order of magnitude larger than that of bulk ZnO crystal. The observation of room-temperature UV lasing from the ordered, nano-sized ZnO crystals represents an important step towards the development of nanometer photoelectronics.
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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
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