报 告 人：常林博士，加州大学圣芭芭拉分校
邀 请 人：王健 教授
英文：Heterogeneous integration for nonlinear photonics
I would like to introduce integrated nonlinear platforms we recently developed based on heterogeneous wafer bonding technology. Nonlinear devices with the record high efficiency of second harmonic generation and extremely low threshold for frequency comb generation have been demonstrated on (Al)GaAs on insulator platform. Such platform combines the state of the art nonlinear devices with the III-V semiconductor active devices, paving the way to a revolutionary nonlinear photonic integrated circuits (PICs). In the meanwhile, I will also talk about other nonlinear platforms we developed by using materials such as LiNbO3 and SiN. With those advanced devices, our teams demonstrated the first optical frequency synthesizer based on integrated photonics, which enabled the generation of an optical frequency with stability ~10-15 across telecom band. I will also give an outlook of the nonlinear PICs in the future and the potential applications in quantum areas.
常林来自于加州大学圣芭芭拉分校，目前在John Bowers教授领导的光电集成的课题组里攻读博士学位。他主要致力于集成光路，特别是非线性集成光路方向的研究。在基于砷化镓（GaAs）和铌酸锂（LiNO3）在绝缘体的平台上，成功实现了各类高效的非线性器件。这些先进的非线性的平台为实现全集成的非线性光路以及未来的量子光路打开了大门。在系统层面，他参与了世界上第一个基于集成光学的光频合成器的研发，并成功实现了通信波段内稳定度高达10-15的频率控制。目前为止，他已在Nature，Laser Photonics Review, Physics Review Letters, Optica 等顶级期刊上发表文章十余篇。同时也在许多业内顶级会议如CLEO和IPC上给与特邀报告。
Dr. Lin Chang is from Electrical and Computer Engineering department, University of California, Santa Barbara, working in the optoelectronics research group headed by Prof. John Bowers. Lin’s research primarily focuses on the development of photonic integrated circuits, especially the integrated nonlinear photonic devices. He successfully demonstrated many state of the art high efficient nonlinear photonic applications using heterogeneous bonding technology in both Gallium Arsenide (GaAs) and Lithium Niobate (LN) on insulator platforms. The device demonstrations on these platforms have opened the door to a revolutionary nonlinear integrated photonic circuits (PICs) and are poised to enable quantum PICs in the near future. In system level, Lin played key role in the developmental work of the first optical synthesizer based on integrated photonics. The synthesizer is exceptionally stable across the telecommunication C-band. Many applications of optical-frequency sources could benefit from the high-precision optical synthesis presented here. Leveraging high-volume semiconductor processing built around advanced materials could allow such low-cost, low-power and compact integrated-photonics devices to be widely used. Lin has published over 10 refereed international papers in top journals including Nature, Laser Photonics Review, Physics review letters, Optica... He has given invited/postdeadline talks in many top international conferences like Conference on Lasers and Electro-Optics (CLEO) and IEEE Photonics Conference (IPC).