Quantum dot-based optically pumped VCSELs with high-contrast periodic gratings

We present our recent results on quantum dot-based VCSELs for O-band telecoms applications. The incorporation of Sirich SiN $_{x} /$SiO 2 distributed Bragg mirrors, which have been studied by spectroscopic ellipsometry, as well as using high-contrast SiN $_{x}1\mathrm {D}$ gratings will lead to a significant size reduction desirable for the fabrication.