A study of sulphur diffusion in ZnMgSSe/ZnSe quantum wells by energy-loss imaging in a transmission electron microscope

Authors
Walther, T Kalisch, H Heime, K Heuken, M Marko, I Yablonskii, GP
Citation
T. Walther et al., A study of sulphur diffusion in ZnMgSSe/ZnSe quantum wells by energy-loss imaging in a transmission electron microscope, PHYS ST S-A, 180(1), 2000, pp. 351-356
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
00318965 → ACNP
Volume
180
Issue
1
Year of publication
2000
Pages
351 - 356
Database
ISI
SICI code
0031-8965(20000716)180:1<351:ASOSDI>2.0.ZU;2-Z
Abstract
The technique of spectrum imaging in a transmission electron microscope wit h energy filter and two-dimensional detector is applied to a ZnMgSSe/ZnSe m ultiple quantum well laser structure. Quantitative S profiles are extracted from this quaternary system with an accuracy better than 1 at% at a spatia l resolution of 1 nm. From a comparison of as-grown and annealed structures the diffusivity is calculated to 6 x 10(-22) m(2)s(-1) at a temperature of 277 degrees C.