Table 2

Four types of samples

Sample A

Sample B

Sample C

Sample D

With InAs QD layers

As grown

As grown

Annealed for 5 min

Annealed for 5 min

QDs are covered by 1 ML AlAs layers

No

Yes

No

Yes

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