K. Tachibana et al., Selective growth of InGaN quantum dot structures and their microphotoluminescence at room temperature, APPL PHYS L, 76(22), 2000, pp. 3212-3214
We have fabricated InGaN quantum dot (QD) structures on hexagonal pyramids
of GaN, using metalorganic chemical vapor deposition with selective growth.
Intense photoluminescence was observed from the sample at room temperature
. To directly observe the emitting areas, microphotoluminescence intensity
images with a spatial resolution of a few hundred nanometers were used. The
images show the emission was only from the tops of the hexagonal pyramids.
The width of the emitting areas is about 300 nm, which is comparable to th
e spatial resolution of the images. Such a narrow width of emission areas i
ndicates that InGaN QDs are formed on the tops of pyramids. (C) 2000 Americ
an Institute of Physics. [S0003-6951(00)01022-6].