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- Title
Influence of GaAs Substrate Orientation on InAs Quantum Dots: Surface Morphology, Critical Thickness, and Optical Properties.
- Authors
Liang, B.; Wang, Zh.; Sablon, K.; Mazur, Yu.; Salamo, G.
- Abstract
InAs/GaAs heterostructures have been simultaneously grown by molecular beam epitaxy on GaAs (100), GaAs (100) with a 2° misorientation angle towards [01−1], and GaAs ( n11)B ( n = 9, 7, 5) substrates. While the substrate misorientation angle increased from 0° to 15.8°, a clear evolution from quantum dots to quantum well was evident by the surface morphology, the photoluminescence, and the time-resolved photoluminescence, respectively. This evolution revealed an increased critical thickness and a delayed formation of InAs quantum dots as the surface orientation departed from GaAs (100), which was explained by the thermal-equilibrium model due to the less efficient of strain relaxation on misoriented substrate surfaces.
- Publication
Nanoscale Research Letters, 2007, Vol 2, Issue 12, p609
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1007/s11671-007-9103-3