Title: Effect of growth interruption in 1.55 μ m InAs/InAlGaAs quantum dots on InP grown by molecular beam epitaxy

Journal Article · · Journal of Applied Physics
DOI: https://doi.org/10.1063/1.5031772 · OSTI ID:1438508

We report the effect of growth interruptions on the structural and optical properties of InAs/InAlGaAs/InP quantum dots using molecular beam epitaxy. We find that the surface quantum dots experience an unintended ripening process during the sample cooling stage, which reshapes the uncapped InAs nanostructures. To prevent this, we performed a partial capping experiment to effectively inhibit structural reconfiguration of surface InAs nanostructures during the cooling stage, revealing that InAs nanostructures first form quantum dashes and then transform into quantum dots via a ripening process. Our result suggests that the appearance of buried InAs/InAlGaAs nanostructures can be easily misunderstood by surface analysis.

Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
AR0000672
OSTI ID:
1438508
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 20 Vol. 123; ISSN 0021-8979
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

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