Table 1

Structural parameters of the GaN/AlN QD samples and the measured morphology characteristics

Sample

AlN spacer thickness (nm)

GaN insertion layer thickness (nm)

QD density (cm-2)

Mean QD height (nm)

Mean QD diameter (nm)

QD AR


A

N/A

None

4.4 × 1011

1.1

10.2

0.11

B

60

100

4.0 × 1011

1.5

10.5

0.14

C

40

100

2.2 × 1011

1.9

11.8

0.16

D

20

100

9.6 × 1010

2.9

17.2

0.17


Niu et al. Nanoscale Research Letters 2011 6:611   doi:10.1186/1556-276X-6-611

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