AI Article Synopsis
- III-V ternary alloy quantum-wells, particularly GaAs/GaAsSb, are gaining attention in near-infrared optoelectronics due to unique properties when reduced to nanowires.
- GaAs/GaAsSb coaxial single quantum-well nanowires with varying Sb compositions were grown, showing enhanced optical characteristics through photoluminescence measurements.
- Findings indicate that increasing the Sb component deepens the quantum well, improving electron confinement and maintaining effective emission even at room temperature, which may aid in developing more advanced alloy quantum-well devices.
Article Abstract
III-V ternary alloy quantum-wells have become a hot topic in recent years. Especially, GaAs/GaAsSb quantum wells have attracted increasing attention due to their numerous applications in the field of near-infrared optoelectronic devices. With the further reduction of dimensions, GaAs/GaAsSb nanowires show many special properties compared to their quantum well structures. In this work, GaAs/GaAs Sb /GaAs coaxial single quantum-well nanowires with different Sb composition were grown by molecular beam epitaxy. The band structure and the optical properties were investigated through power-dependent and temperature-dependent photoluminescence measurement. It has been found that a deeper quantum well is created with the increase of Sb component. Thanks to the deeper quantum well, more effective electron confinement has been realized, the emission from the sample can still be detected up to room temperature. The different trend of peak position and shape at various temperatures also supports the improved temperature stability of the samples. These results will be beneficial for the design of alloy quantum wells, and will facilitate the development of alloy quantum-well based devices.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9075889 | PMC |
| http://dx.doi.org/10.1039/c9ra08451g | DOI Listing |
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