Room-temperature ultraviolet laser emission from self-assembled ZnO microcrystallite thin films
- 16 June 1998
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 72 (25) , 3270-3272
- https://doi.org/10.1063/1.121620
Abstract
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.Keywords
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