Last missing piece of on-chip silicon-photonics integration: electrically pumped continuous-wave semiconductor laser

https://www.fz-juelich.de/en/news/archive/press-release/2024/the-last-missing-piece-of-silicon-photonics

"stacked ultrathin silicon germanium-tin/ germanium-tin layers... cost savings, improved performance... compatible with CMOS technology... laser operates with low 5 mA current injection at 2 V... multi-quantum well structure/ ring geometry, low heat generation, enabling stable operation up to -183.15°C... generates light when an electrical current passes through diode.. photonics, electronics, thermoelectric, spintronics... future: reduce lasing threshold, achieve room-temperature operation"