Liang Wu

Liang Wu
Standing Faculty

Assistant Professor

Research Areas: Condensed Matter, Ultrafast optics & Terahertz


DRL 2N32

  • Assistant Professor, University of Pennsylvania (Jul. 1, 2018 - present )                                      
  • Postdoctoral Fellow, University of California, Berkeley (Jan. 2016 - Jun. 2018)

Honors & Awards:

  • McMillan Award for outstanding contributions in condensed matter physics, University of Illinois (2019)
  • Army Research Office Young Investigator Program (YIP) Award (2019)
  • "30 under 30" in Science by Forbes Magazine (2018)
  • Michelson Postdoctoral Prize Lectureship, Case Western Reserve University (2017)
  • Richard L. Greene Dissertation Award in Experimental Condensed Matter Physics,  American Physical Society (2017)
  • Pacemaker for Outstanding Students, Nanjing University (2009)
  • National Scholarship, Nanjing University (2008)

Ph.D. Physics, Johns Hopkins University (2015)

M.A. Physics, Johns Hopkins University (2012)

B.S. Physics, Nanjing University (2010)

Research Interests

I am an experimental condensed matter physicist with a strong interest in light-matter interactions.  I develop and utilize time-resolved and nonlinear optical techniques in both the terahertz (THz) and optical frequency regimes to study and control properties of materials broadly known as ''quantum materials.’’ In this class of matter, collective phases and properties defy a classical description, often leading to an exotically rich range of emergent phenomena.  My research interests include but are not limited to, topological insulators and semimetals, quantum antiferromagnets, spin liquids and topological superconductors.

Courses Taught

Phys 151: Principles of Physics II

Selected Publications
  • N. P. Armitage and Liang Wu. On the matter of topological insulators as magneto-electrics. SciPost Phys. 6, 046 (2019) 
  • Liang Wu*, A. Little, E. E. Aldape, D. Rees, E. Thewalt, P. Lampen-Kelley, A. Banerjee, C. A. Bridges, J.-Q. Yan, D. Boone, S. Patankar, D. Goldhaber-Gordo, D. Mandrus, S. E. Nagler, E. Altman, and J. Orenstein. Field evolution of magnons in α-RuCl3 by high-resolution polarized terahertz spectroscopyPhys. Rev. B 98, 094425 (2018)
  • ​S. Patankar, Liang Wu, B. Z. Lu, M. Rai, J. D. Tran, T. Morimoto, D. Parker, A. Grushin, N. L. Nair, J. G. Analytis, J. E. Moore, J. Orenstein, D. H. Torchinsky.  Resonance-enhanced optical nonlinearity in the Weyl semimetal TaAs.  Phys. Rev. B 98, 165113 (2018)
  • T. Higo, H. Man, D. B. Gopman, Liang Wu, Y. P. Kabanov, O. M. J. van’t Erve, D. Rees, Y. F. Li, S. Patankar, M. Ikhlas, C. L. Chien, R. D. Shull, J. Orenstein, and S. Nakatsuji. Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal. Nature Photonics. 12, 73-78 (2018)
  • A. Little†, Liang Wu,,P. Kelley, A. Banerjee, D. Mandrus, S. Nagler and J. Orenstein. Antiferromagnetic resonance and terahertz continuum in αRuCl3Phys. Rev. Lett.  119, 227201 (2017)
  • Liang Wu, S. Patankar, T. Morimoto, N. L. Nair, E. Thewalt, A. Little, J. Analytis, J. E. Moore and J. W. Orenstein. Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals. Nature Physics 13, 350-355 (2017)
  • Liang Wu, M. Salehi, N. Koirala, J. Moon, S. Oh and N. P. Armitage. Quantized Faraday and Kerr rotation and axion electrodynamics of a 3D topological insulatorScience 354, 1124-1127 (2016) 
  • Liang Wu, W. K. Tse, M. Brahlek, C. M. Morris, R. Valdes Aguilar, N. Koirala, S. Oh and N. P. Armitage. High-resolution Faraday rotation and electron-phonon coupling in surface states of the bulk-insulating topological insulator Cu0.02Bi2Se3Phys. Rev. Lett. 115, 217602 (2015)
  • Liang Wu, M. Brahlek, R. Valdes Aguilar, A. V. Stier, C. M. Morris, Y. Lubashevsky, L. S. Bilbro, N. Bansal, S. Oh, N. P. Armitage. A sudden collapse in transport lifetime through the topological phase transition in (Bi1xInx)2Se3Nature Physics 9, 410-414 (2013)
CV (file)