Abstract
The characterization of GaN microstructures grown by plasma-assisted molecular beam epitaxy on LiAlO2 substrate was studied by cathodoluminescence and photoluminescence measurements. We demonstrated that the cathodoluminescence from oblique semi-polar surfaces of mushroom-shaped GaN was much brighter than that from top polar surface due to the reduction of polarization field on the oblique semi-polar surfaces. It implies that the oblique semi-polar surface is superior for the light-emitting surface of wurtzite nano-devices.
Highlights
The characterization of GaN microstructures grown by plasma-assisted molecular beam epitaxy on LiAlO2 substrate was studied by cathodoluminescence
We demonstrated that the cathodoluminescence from oblique semi-polar surfaces
It implies that the oblique semi-polar surface is superior for the light-emitting surface
Summary
The characterization of GaN microstructures grown by plasma-assisted molecular beam epitaxy on LiAlO2 substrate was studied by cathodoluminescence and photoluminescence measurements.
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