Nitrogen-polar GaN quantum dots with tunable emission in the ultraviolet-A, B, and C bands
Md Mehedi Hasan Tanim,
Shubham Mondal,
Yuanpeng Wu
et al.
Abstract:In this study, we report on the molecular beam epitaxy and characterization of nitrogen-polar (N-polar) GaN quantum dots (QDs) grown on SiC substrates. By varying the growth conditions, the emission wavelengths of GaN QDs can be controllably tuned across a large part of the ultraviolet-A, B, and C bands. For N-polar QDs emitting at 243 nm, we measured an internal quantum efficiency (IQE) of 86.4% at room temperature, with predominantly transverse-electric (TE) polarized emission. Such N-polar GaN QDs offer a p… Show more
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