State Key Laboratory of Terahertz and Millimeter Waves
(City University of Hong Kong)
Seminar on
Integrated lithium niobate microwave and millimeter-wave photonics
Professor Cheng Wang
Associate Professor
Department of Electrical Engineering
City University of Hong Kong
Date : 28 November 2024 (Thursday)
Time : 10:00 am – 11:00 am
Venue : Room 6-208, 6/F, Lau Ming Wai Academic Building
Abstract
Integrated microwave photonics (MWP) is a powerful technology that leverages integrated photonic technologies for the generation, transmission, and manipulation of microwave signals in chip-scale optical systems. In this talk, I will discuss our recent efforts on developing a thin-film lithium niobate (TFLN) MWP platform that simultaneously features efficient, linear, and high-speed electro-optic modulators for high-fidelity microwave-optic conversion, low-loss functional photonic networks that can be configured for a variety of signal processing tasks, as well as large-scale, low-cost manufacturability. I will first discuss a variety of high-performance device-level building blocks, including low-loss photonic waveguides and resonators (0.03 dB/cm), broadband electro-optic modulators covering the entire millimeter-wave and partly terahertz bands (up to 500 GHz), broadband power-efficient frequency comb sources, as well as ultra-compact inverse-designed photonic elements. Building upon this platform, we further demonstrate high-performance MWP system-level applications, including ultrahigh-speed analog signal processing, integrated photonic millimeter-wave radars, and on-chip optical vector analyzers.
Biography
Dr. Cheng Wang is an Associate Professor of Electrical Engineering at City University of Hong Kong. He received his B.S. degree in Microelectronics from Tsinghua University in 2012, and his S.M. (2015) and Ph.D. (2017) degrees, both in Electrical Engineering from Harvard University, supervised by Prof. Marko Lončar. After conducting research as a postdoctoral fellow at Harvard, he joined City University of Hong Kong as an Assistant Professor in 2018. Prof. Wang's research focuses on the design and nanofabrication technology of integrated photonic devices and circuits. His current research effort focuses on realizing integrated lithium niobate photonic circuits for applications in optical communications, millimeter-wave/terahertz technologies, nonlinear optics, and quantum photonics. Since joining CityU, Prof. Wang has received a number of awards in research, including the NSFC Excellent Young Scientist Fund (HK & Macau) (2019), the Croucher Innovation Award (2020), and 35 Innovators Under 35 (China), MIT Technology Review (2021).
*** ALL ARE WELCOME ***
Enquiries:
Professor Chi Hou Chan, State Key Laboratory of Terahertz and Millimeter Waves
Tel.: (852) 3442 9360 Fax: (852) 3442 0353 Email: eechic@cityu.edu.hk
