LI Xinwei
PhD in electrical engineering from Rice University (2019)
Assistant Professor, NUS Presidential Young Professorship

Email: xinweili@nus.edu.sg
Office: S12-02-08
Tel: +65 6516 2960

Current Research

  • His research focuses on developing ultrafast optical techniques as a means for interrogating light-matter coupling in cavity polariton systems and creating unusual photo-induced phases of quantum materials. His contributions include fabrication of a Landau-polariton system that broke the world record for cooperativity, demonstration of Dicke cooperativity in quantum magnets, and realizing a terahertz gain medium using excitonic energy levels in photo-excited semiconductors. His most recent work has been devoted to dynamical tuning of the electronic and magnetic structures of correlated insulators by nonresonant laser-field driving.

Selected Publications

  • O. Mehio*, X. Li*, H. Ning*, Z. Lenarcic, Y. Han, M. Buchhold, Z. Porter, N. Laurita, S. Wilson, D. Hsieh, “A Hubbard exciton fluid in a photo-doped antiferromagnetic Mott insulator,” Nature Physics, (2023).
  • X. Li*, H. Ning*, O. Mehio*, H. Zhao, M. Lee, K. Kim, F. Nakamura, Y. Maeno, G. Cao, D. Hsieh, “Keldysh space control of charge dynamics in a strongly driven Mott insulator,” Physical Review Letters 128, 187402 (2022).
  • X. Li, D. Kim, Y. Liu, J. Kono, “Terahertz spin dynamics in rare-earth orthoferrites,” Photonics Insights 1, R05 (2022).
  • X. Li*, K. Yoshioka*, Q. Zhang, N. Marquez, F. Katsutani, W. Gao, G. Noe, J. Watson, M. Manfra, I. Katayama, J. Takeda, J. Kono, “Observation of photoinduced terahertz gain in GaAs quantum wells: Evidence for radiative two-exciton-to-biexciton scattering,” Physical Review Letters 125, 167401 (2020).
  • L. Prochaska*, X. Li*, D. MacFarland*, A. Andrews, M. Bonta, E. Bianco, S. Yazdi, W. Schrenk, H. Detz, A. Limbeck, Q. Si, E. Ringe, G. Strasser, J. Kono, S. Paschen, “Singular charge fluctuations at a magnetic quantum critical point,” Science 367, 285 (2020).
  • X. Li, M. Bamba, N. Yuan, Q. Zhang, Y. Zhao, M. Xiang, K. Xu, Z. Jin, W. Ren, G. Ma, S. Cao, D. Turchinovich, J. Kono, “Observation of Dicke cooperativity in magnetic interactions,” Science 361, 794 (2018).
  • X. Li, M. Bamba, Q. Zhang, S. Fallahi, G. Gardener, W. Gao, M. Lou, K. Yoshioka, M. Manfra, J. Kono, “Vacuum Bloch-Siegert shift in Landau polaritons with ultrahigh cooperativity,” Nature Photonics 12, 324 (2018).

Affiliations & Links