Fabrication of InGaN/GaN nanodisk structure by using bio-template and neutral beam etching process

Quantum dot optoelectronic devices are very attractive for their low power consumption, temperature stability, and high-speed modulation. We developed a defect-less, top-down fabrication process for sub-12-nm diameter InGaN quantum nanodisks (NDs) embedded in GaN barrier by using a combination of a bio-template and neutral beam etching. We have achieved high density of 2.6 × 1011 cm-2 with 6-nm in diameter and 15-nm-high nanopillars.