Details

Autor(en) / Beteiligte

• Oh, Jae Won
• Ryu, Mee-Yi
• Jo, Byounggu
• Kim, Jin Soo
• Harris, T.R.
• Yeo, Yung Kee

Titel

Bimodal luminescence behavior of spatially-ordered seven-stacked InAs/InAlGaAs quantum dots

Ist Teil von

• Thin solid films, 2013-08, Vol.541, p.68-71

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Seven-stacked InAs/InAlGaAs quantum dots (QDs) grown on InP substrates have been studied using photoluminescence (PL) and time-resolved PL techniques, and the results show a bimodal luminescence behavior. The seven-stacked QD sample shows a redshifted PL emission energy, a broad PL linewidth, and a strong temperature dependent PL compared with the single layer QD sample. The decrease of the PL decay time with increasing emission wavelength has been observed in the seven-stacked sample, but not in the single layer sample. All of these results are attributed to the bimodal size distribution of QDs in the seven-stacked sample, which originates from different sizes of spatially ordered QDs formed on different layers. ► Single layer and 7-stacked layers of InAs quantum dots (QDs) were grown on InP. ► Temperature-dependent photoluminescence (PL) and time-resolved PL were carried out. ► Two peaks of 7-stacked QDs are attributed to the bimodal size distributions of QDs. ► Single and 7-stacks of QDs show different luminescence properties with temperature.