Optical and structural properties of InGaSb/GaAs quantum dots grown by molecular beam epitaxy
Optical and structural properties of InGaSb/GaAs quantum dots grown by molecular beam epitaxy
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分子束外延生长的InGaSb/GaAs量子点的光学和结构特性
DOI:
10.1088/1361-6641/aae627
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发表时间:
2018
影响因子:
1.9
通讯作者:
Hodgson P
中科院分区:
文献类型:
--
作者:
Hodgson P
We present the results of an investigation into the growth of InGaSb/GaAs quantum dots (QDs) by molecular beam epitaxy using migration-enhanced epitaxy. Surface atomic force microscopy and cross-sectional transmission electron microscopy show that the QDs undergo a significant change in morphology upon capping with GaAs. A GaAs' cold capping'technique was partly successful in preserving QD morphology during this process, but strong group-V intermixing was still observed. Energy-dispersive x-ray spectroscopy reveals that the resulting nanostructures are small'core'QDs surrounded by a highly intermixed disc. Temperature varying photoluminescence (PL) measurements indicate strong light emission from the QDs, with an emission wavelength of 1230 nm at room temperature. Nextnano 8× 8 kp calculations show good agreement with the PL results and indicate a low level of group-V intermixing in the core QD.
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DOI:
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1996
期刊:
影响因子:
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DOI:
10.1088/0022-3727/41/23/232003
发表时间:
2008-12
期刊:
Journal of Physics D: Applied Physics
影响因子:
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作者:
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通讯作者:
Q. Zhuang;P. Carrington;A. Krier