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The Role of Groove Periodicity in the Formation of Site-Controlled Quantum Dot Chains

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Original languageEnglish
Article number242
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Publication statusPublished - 28 May 2015
Publication typeA1 Journal article-refereed


Structural and optical properties of InAs quantum dot (QD) chains formed in etched GaAs grooves having different periods from 200 to 2000 nm in [010] orientation are reported. The site-controlled QDs were fabricated by molecular beam epitaxy on soft UV-nanoimprint lithography-patterned GaAs(001) surfaces. Increasing the groove periods decreases the overall QD density but increases the QD size and the linear density along the groove direction. The effect of the increased QD size with larger periods is reflected in ensemble photoluminescence measurements as redshift of the QD emission. Furthermore, we demonstrate the photoluminescence emission from single QD chains.


  • III-V semiconductors, InAs Quantum dots, Site-controlled quantum dots, Molecular beam epitaxy, Nanoimprint lithography, PHOTON TURNSTILE, EMISSION, GROWTH, DEVICE

Publication forum classification

Field of science, Statistics Finland