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Elastic strains at interfaces in InAs/AlSb multilayer structures for quantum cascade lasers
- Source :
- Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2014, 104 (3), pp.031907. ⟨10.1063/1.4863035⟩, Applied Physics Letters, 2014, 104 (3), pp.031907. ⟨10.1063/1.4863035⟩, Zaguán. Repositorio Digital de la Universidad de Zaragoza, instname
- Publication Year :
- 2016
-
Abstract
- InAs/AlSb multilayers similar to those used in quantum cascade lasers have been grown by molecular beam epitaxy on (001) InAs substrates. Elastic strain is investigated by high resolution transmission electron microscopy. Thin interfacial regions with lattice distortions significantly different from the strain of the AlSb layers themselves are revealed from the geometrical phase analysis. Strain profiles are qualitatively compared to the chemical contrast of high angle annular dark field images obtained by scanning transmission electron microscopy. The strain and chemical profiles are correlated with the growth sequences used to form the interfaces. Tensile strained AlAs-like interfaces tend to form predominantly due to the high thermal stability of AlAs. Strongly asymmetric interfaces, AlAs-rich and (Al, In)Sb, respectively, can also be achieved by using appropriate growth sequences.
- Subjects :
- 010302 applied physics
Materials science
Physics and Astronomy (miscellaneous)
Condensed matter physics
Heterojunction
02 engineering and technology
021001 nanoscience & nanotechnology
Epitaxy
01 natural sciences
Dark field microscopy
[SPI.TRON]Engineering Sciences [physics]/Electronics
Transmission electron microscopy
0103 physical sciences
Microscopy
Scanning transmission electron microscopy
0210 nano-technology
High-resolution transmission electron microscopy
ComputingMilieux_MISCELLANEOUS
Molecular beam epitaxy
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2014, 104 (3), pp.031907. ⟨10.1063/1.4863035⟩, Applied Physics Letters, 2014, 104 (3), pp.031907. ⟨10.1063/1.4863035⟩, Zaguán. Repositorio Digital de la Universidad de Zaragoza, instname
- Accession number :
- edsair.doi.dedup.....b7202518fdb4d3dc90765facaef803cf