Realizing efficient on-chip light sources has long been the “holy-grail” for Si-photonics research. Several important breakthroughs were made in this field in the past few years. In this article, we review the most recent advances in light sources integrated onto mainstream Si platforms and discuss four different integration technologies: Group IV light sources on Si, heterogeneous integration of III–V light sources on Si, blanket heteroepitaxy of III–V light sources on Si, and selective heteroepitaxy of III–V light sources on Si. We start with briefly introducing the basic concepts of each technology and then focus on the recent progress via presenting the most representative device demonstrations. Finally, we discuss the research challenges and opportunities associated with each technology.

中文翻译：

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硅光源的最新进展

实现高效的片上光源长期以来一直是硅光子学研究的“圣杯”。过去几年，该领域取得了多项重要突破。在本文中，我们回顾了集成到主流 Si 平台上的光源的最新进展，并讨论了四种不同的集成技术：Si 上的 IV 族光源、Si 上 III-V 光源的异质集成、III-V 光的全面异质外延Si上的光源，以及Si上III-V光源的选择性异质外延。我们首先简要介绍每种技术的基本概念，然后通过展示最具代表性的设备演示来关注最近的进展。最后，我们讨论了与每种技术相关的研究挑战和机遇。