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Room-temperature ultraviolet laser emission from self-assembled ZnO microcrystallite thin films

Tang, Z. K. ; Wong, G. K. L. ; Yu, P. ; Kawasaki, M. ; Ohtomo, A. ; Koinuma, H. ; Segawa, Y.

Applied physics letters, 1998-06, Vol.72 (25), p.3270-3272 [Periódico revisado por pares]

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Título:
Room-temperature ultraviolet laser emission from self-assembled ZnO microcrystallite thin films
Autor: Tang, Z. K. ; Wong, G. K. L. ; Yu, P. ; Kawasaki, M. ; Ohtomo, A. ; Koinuma, H. ; Segawa, Y.
É parte de: Applied physics letters, 1998-06, Vol.72 (25), p.3270-3272
Descrição: 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.
Idioma: Inglês

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