Integrated lithium niobate nonlinear photonics

报告题目:Integrated lithium niobate nonlinear photonics

报告人:陆娟娟  教授(上海科技大学)




Integrated silicon photonics, as a post-Moore technology, has been intensively studied and proven to be particularly advantageous in data transmission due to its lower energy consumption, increased speed, and compatibility to the CMOS processing technology. The rapid progress of low-loss photonic platform has also opened up new possibilities of nonlinear sciences at nanoscale due to high optical confinement and enhanced light-matter interactions assisted by the high-Q microcavities. However, as a centrosymmetrical material, silicon lacks intrinsic second-order (χ(2)) nonlinearity, which fundamentally limits its performance in terms of electro-optic modulation, second harmonic generation, parametric down conversion process, etc. Possessing significant χ(2) and χ(3) nonlinearities, broad transparency window, and flexibility in ferroelectric domain engineering, thin film lithium niobate is regarded by many as "silicon of photonics" and has recently risen to the forefront of chip-scale nonlinear and quantum photonics research since its demonstration as a ultralow-loss photonics platform. In this talk, I will present my work on the systematic development of several state-of-the-art χ(2) nonlinear photonic devices based on thin film lithium niobate, including second harmonic generator, optical parametric oscillator as well as chip-based optical frequency comb generator, assisted by the meticulous device design and advanced nanofabrication of ultralow-loss photonic structures.


Dr. Juanjuan Lu is an assistant professor in the School of Information Science and Technology at ShanghaiTech University. Prior to joining ShanghaiTech Univ., she received her Ph.D. degree in Electrical Engineering from Yale University in 2022 and her B.S. degree in Applied Physics from University of Science and Technology of China in 2016. Her research focuses on the integrated nonlinear photonics and their applications in both classical and quantum fields. Her works have been published in reputed journals, including Nat. Commun., Optica, and Phys. Rev. Lett..