Samenvatting
Control of the height of (In,Ga)As quantum dots (QDs) on GaAs (100) substrates is presented. Columnar (In,Ga)As QDs that are homogeneous both in composition and shape along the growth direction are created by molecular beam epitaxy. The columnar QDs are formed on InAs seed QDs by alternating deposition of thin GaAs intermediate layers and monolayers of InAs with extended growth interruptions after each layer. The height of the columnar QDs is controlled by varying the number of GaAs/InAs layers. With increased height the photoluminescence (PL) emission wavelength of the columnar QDs is red-shifted and the line width narrows. Uncapped columnar QDs (surface QDs) emit PL at a long peak wavelength of 1.45 μm at RT due to reduced compressive strain.
Originele taal-2 | Engels |
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Titel | 2004 13th International Conference on Semiconducting and Insulating Materials, SIMC-XIII-2004 |
Plaats van productie | Piscataway |
Uitgeverij | Institute of Electrical and Electronics Engineers |
Pagina's | 125-130 |
Aantal pagina's | 6 |
ISBN van geprinte versie | 078038668X, 9780780386686 |
DOI's | |
Status | Gepubliceerd - 1 dec. 2005 |
Evenement | 2004 13th International Conference on Semiconducting and Insulating Materials, SIMC-XIII-2004 - Beijing, China Duur: 20 sep. 2004 → 25 sep. 2004 |
Congres
Congres | 2004 13th International Conference on Semiconducting and Insulating Materials, SIMC-XIII-2004 |
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Land/Regio | China |
Stad | Beijing |
Periode | 20/09/04 → 25/09/04 |