B.S. Peking University 2012Ph.D. California Institute of Technology 2017

Dr. Yi received his B.S. in Physics from Peking University in 2012 and his Ph.D. in Applied Physics from California Institute of Technology in 2017. He joined University of Virginia in 2018. Dr. Yi’s research is focused on quantum and classical applications of integrated photonics through leveraging optical resonators and optical frequency combs. He also extends his work to many interdisciplinary areas, including quantum optics, astronomy, spectroscopy, microwave photonics and etc.


  • NASA Group Achievement Award 2017
  • AFOSR YIP Award 2021
  • NSF CAREER Award 2023

Research Interests

  • Integrated Photonics
  • Quantum Optics
  • Microwave Photonics
  • Optical microresonators
  • Optical frequency combs

Selected Publications

  • Generation of squeezed quantum microcombs with silicon nitride integrated photonic circuits Optica, 10, 1100 (2023); M. Jahabozorgi, Z. Yang, S. Sun, H. Chen, R. Liu, B. Wang, X. Yi.
  • A squeezed quantum microcomb on a chip NATURE COMMUNICATIONS, 12, 4781 (2021); Z. Yang, M. Jahanbozorgi, D. Jeong, S. Sun, O. Pfister, H. Lee, X. Yi.
  • Vernier frequency division with dual-microresonator solitons NATURE COMMUNICATIONS, 11, 3975 (2020); B. Wang, Z. Yang, X. Zhang, X. Yi.
  • Imaging soliton dynamics in optical microcavities Nature Communications, 9, 3565 (2018). X.Yi, Q.F. Yang, K.Y. Yang, K.J. Vahala.
  • “Counter-propagating solitons in microresonators” Nature Photonics 11, 560 (2017). Q.F. Yang, X. Yi, K.Y. Yang, K.J. Vahala.
  • “Stokes solitons in optical microcavities” Nature Physics 13 (1), 53 (2017). Q.F. Yang, X. Yi, K.Y. Yang, K.J. Vahala.
  • “Demonstration of a near-IR line-referenced electro-optical laser frequency comb for precision radial velocity measurements in astronomy” Nature communications, 7, 10436 (2016). X. Yi, K. Vahala, J. Li, S. Diddams, G. Ycas, P. Plavchan, S. Leifer, J. Sandhu, G. Vasisht, P. Chen, P. Gao, J. Gagne, E. Furlan, M. Bottom, E. C. Martin, M. P. Fitzgerald, G. Doppmann, C. Beichman.
  • “Soliton frequency comb at microwave rates in a high-Q silica microresonator” Optica 2 1078 (2015). X. Yi, Q.F. Yang, K.Y. Yang, M.G. Suh, K.J. Vahala.
  • “Electro-optical frequency division and stable microwave synthesis” Science 345, 309 (2014). J. Li, X. Yi, H. Lee, S.A. Diddams, K.J. Vahala.

Courses Taught

  • ECE 1501: Frontiers in ECE
  • ECE 3501: Quantum Mechanics for Engineering and Computing
  • ECE 3103: Solid State Devices
  • ECE 4501/6501: Optical Quantum Electronics