TITLE

Cathodoluminescence measurement of an orientation dependent aluminum concentration in AlxGa1-xAs epilayers grown by molecular beam epitaxy on a nonplanar substrate

AUTHOR(S)
Hoenk, Michael E.; Chen, Howard Z.; Yariv, Amnon; Morkoç, Hadis; Vahala, Kerry J.
PUB. DATE
April 1989
SOURCE
Applied Physics Letters;4/3/1989, Vol. 54 Issue 14, p1347
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Cathodoluminescence scanning electron microscopy is used to study AlxGa1-x As epilayers grown on a nonplanar substrate by molecular beam epitaxy. Grooves parallel to the [011] direction were etched in an undoped GaAs substrate. Growth on such grooves proceeds on particular facet planes. We find that the aluminum concentration in the epilayers is dependent on the facet orientation, changing by as much as 35% from the value in the unpatterned areas. The transition in the aluminum concentration at a boundary between two facets is observed to be very abrupt.
ACCESSION #
9830632

 

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