The authors report on a postgrowth method to obtain low density InAs/InP(001) quantum dots by solid-source molecular beam epitaxy. They used an approach based on the ripening of the InAs sticks, which is triggered by the sample cooling under arsenic overpressure, before InP capping. Atomic force microscopy images show the evolution of InAs islands from sticks oriented along the [1-10] direction to dot-shaped islands with a density that can be reduced to about 2×109 dots/cm2. Macro- and microphotoluminescence reveal that these diluted InAs dots exhibit a strong spatial confinement and emit in the 1.55 μm range.
Published in:
Applied Physics Letters
(Volume:89
,
Issue:
12
)
Date of Publication:
Sep 2006
- Page(s):
-
123112
-
123112-3
- ISSN :
-
0003-6951
- Digital Object Identifier :
-
10.1063/1.2354010
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
18 June 2009
- Issue Date :
-
Sep 2006