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Title: InAs self-organized quantum dots grown by molecular beam epitaxy using a "nucleation-augmented" method
Authors: Chia, C.K.
Chua, S.J. 
Miao, Z.
Chye, Y.H.
Keywords: MBE
Quantum dots
Issue Date: Apr-2005
Citation: Chia, C.K., Chua, S.J., Miao, Z., Chye, Y.H. (2005-04). InAs self-organized quantum dots grown by molecular beam epitaxy using a "nucleation-augmented" method. International Journal of Nanoscience 4 (2) : 207-211. ScholarBank@NUS Repository.
Abstract: Photoluminescence (PL) measurements performed in a series of InAs self-assembled quantum dot (QD) structures grown by molecular beam epitaxy (MBE) on GaAs (100) substrates using a two-stage "nucleation-augmented" growth method show that an InAs QD "nucleation" layer grown at a fast growth rate, followed by a slowly grown InAs "augmented" layer, dramatically increases the dot density and improves the PL intensity. Besides red-shift in peak wavelength, the PL intensity was found to increase as the growth rate of the InAs augmented layer was reduced. The increased PL intensity was due to a higher dot density arising from the nucleation layer and an improved optical quality caused by the growth interruption in the augmented layer. © World Scientific Publishing Company.
Source Title: International Journal of Nanoscience
ISSN: 0219581X
DOI: 10.1142/S0219581X05003073
Appears in Collections:Staff Publications

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