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Table 1
Layer structures for samples without and with AlAs capping
Without AlAs capping		With AlAs capping

100 nm p-GaAs		100 nm p-GaAs

20 nm i-GaAs		20 nm i-GaAs

6.6 nm i-InGaAs		6.6 nm i-InGaAs
InAs QDs	10×	0.283 nm AlAs	10×
		InAs QDs
20 nm i-GaAs		20 nm i-GaAs

1 μm n-GaAs buffer		1 μm n-GaAs buffer

n-GaAs substrate		n-GaAs substrate

Hu et al. Nanoscale Research Letters 2011 6:83 doi:10.1186/1556-276X-6-83

Table 1