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• W1551148431 abstract "We report photoluminescence (PL) experiments on individual SiGe quantum dots (QDs) that were epitaxially grown in a site-controlled fashion on pre-patterned Si(001) substrates. We demonstrate that the PL line-widths of single QDs decrease with excitation power to about 16 meV, a value that is much narrower than any of the previously reported PL signals in the SiGe/Si heterosystem. At low temperatures, the PL-intensity becomes limited by a 25 meV high potential-barrier between the QDs and the surrounding Ge wetting layer (WL). This barrier impedes QD filling from the WL which collects and traps most of the optically excited holes in this type-II heterosystem." @default.
• W1551148431 created "2016-06-24" @default.
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• W1551148431 date "2015-06-22" @default.
• W1551148431 modified "2023-10-14" @default.
• W1551148431 title "Optical properties of individual site-controlled Ge quantum dots" @default.
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• W1551148431 doi "https://doi.org/10.1063/1.4923188" @default.
• W1551148431 hasPublicationYear "2015" @default.
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