Yaowen Hu, Prof. Loncar Group, Harvard University

December 9th 2022. 12-1pm. LISE 303

Abstract: Lithium niobate is a material with a wide range of applications in optical and microwave
technologies. Recent developments on thin-film lithium niobate (TFLN) photonics have led to
integrated lithium niobate devices that support both high confinement and low propagation loss.
Such breakthroughs provide a photonic platform that offers efficient and ultrafast control of light
using microwaves, excellent scalability to large scale, strong photon-photon interaction, and long
photon lifetime, which is critical for photonic coupled-resonator systems. In this talk, I will discuss
our recent developments on electro-optic coupled-resonators on thin-film lithium niobate, including
high-performance frequency shifters and beam splitters, high-efficiency and broadband electro-optic
frequency combs, four-dimensional frequency crystals, and frequency-domain mirrors.

About the speaker: Yaowen is a graduate student in the Department of Physics at Harvard
University. He received his Bachelor of Science in Physics at Tsinghua University in 2018. He is
currently working in Prof. Marko Loncar’s group at Harvard School of Engineering and Applied
Science. His research is focused on integrated and quantum photonics on thin-film lithium niobate.