The formation of natural oxide on the mirrors of GaSb/GaInAsSb/GaAlAsSb laser heterostructures at places of emergence of al-rich layers View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2006-11

AUTHORS

P. A. Dement’ev, M. S. Dunaevskiĭ, I. V. Makarenko, V. N. Petrov, A. N. Titkov, A. N. Baranov, D. A. Yarekha, R. Laiho

ABSTRACT

Formation of a natural oxide in ambient atmosphere of the mirrors of a GaSb/GaInAsSb/Ga0.1Al0.9As0.93Sb0.07 laser heterostructure at places of emergence Al-rich layers on the mirror surface is studied. The evolution of topography of the laser mirrors produced by cleavage under ambient and ultrahigh vacuum conditions was studied by AFM and STM for mirrors cleaved. The oxidation of Ga0.1Al0.9As0.93Sb0.07 layers on the mirror surface was monitored for more than a year. It is shown that the oxide layer develops over the course of several months and then attains a constant thickness of about 1 μm. In the course of natural oxidation, the volume of the oxide layer increases, which results in its protrusion above the laser mirror surface approximately by a third of the total thickness of the oxide formed. Ultrahigh vacuum studies ruled out the previously assumed occurrence of the effect of plastic extension of Al-rich layers at the instant of cleavage and the resulting protrusion over the cleavage plane. At the initial stage of oxidation, the oxide protruding above the surface demonstrates an unusual concave region in the upper part, which disappears as the oxide grows further. An explanation of the observed transformation of the shape of the oxide layer is offered. It is assumed that the chemical composition of the oxide varies as its thickness increases. More... »

PAGES

1247-1254

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1063782606110017

DOI

http://dx.doi.org/10.1134/s1063782606110017

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1034000657


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