<p>➀ UCSB is at the forefront of quantum dot laser research, aiming to apply the technology to silicon photonics platforms for high-quality, mass-producible chip-on-chip light sources;</p><p>➁ The research involves direct heteroepitaxy of quantum dot lasers on Si using metal-organic chemical vapor deposition, achieving room-temperature continuous-wave quantum dot lasers with high quality quantum dots and complete laser structures;</p><p>➂ Techniques such as nano V-grooves, thermal cycle annealing, and InGaAs/GaAs strain layer lattices are used to reduce surface defect density and enhance performance.</p>