Mengkun Liu

Brookhaven National Laboratory

National Synchrotron Light Source II
Bldg. 741
P.O. Box 5000
Upton, NY 11973-5000

mliu1@bnl.gov

Expertise | Education | Appointments | Publications | Awards

Expertise

•    Strongly correlated electron materials

•    Dirac and Weyl semimetals

•    Low-dimensional materials, 2D twistronics

•    Metamaterials & Nano-Photonics and Plasmonics

•    Broadband infrared near-field nanoscopy and spectroscopy

•    Ultrafast IR-THz spectroscopy and nanoscopy

•    Near-field nanoscopy in cryogenic and magnetic field environments

•    IR-vis-UV ellipsometry

•    Micro-/Nano photonic device fabrication and characterization

Education

Boston University, Physics Department, Boston                         Ph.D.   May 2012

Fudan University, Department of Physics, Shanghai, China      B.S.   July 2006

Professional Appointments

Associate Professor, SUNY, Stony Brook University                    Sept.2020 – present

Visiting Professor, Stanford University                     Aug.–Dec. 2021, July –Aug. 2023

Joint Appointment at NSLS-II at Brookhaven National Laboratory          Oct. 2019 – present

Assistant Professor, SUNY, Stony Brook University                    Jan. 2015 – Aug.2020

Adjunct Assistant Professor, SUNY, Stony Brook University            June 2014 – Jan. 2015

Postdoc Researcher, University of California, San Diego                July 2012 – Dec 2014

Selected Publications

• Xu S, Li Y, Vitalone RA, et al (2024) Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime interference of electron-photon quasiparticles. Science Advances 10:. https://doi.org/10.1126/sciadv.ado5553
• Wehmeier L, Xu S, Mayer RA, et al (2024) Landau-phonon polaritons in Dirac heterostructures. Science Advances 10:. https://doi.org/10.1126/sciadv.adp3487
• Wehmeier L, Yu S, Chen X, et al (2024) Tunable Phonon Polariton Hybridization in a Van der Waals Hetero-Bicrystal. Advanced Materials 36:. https://doi.org/10.1002/adma.202401349
• Dapolito M, Tsuneto M, Zheng W, et al (2023) Infrared nano-imaging of Dirac magnetoexcitons in graphene. Nature Nanotechnology 18:1409–1415. https://doi.org/10.1038/s41565-023-01488-y
• Wehmeier L, Liu M, Park S, et al (2023) Ultrabroadband Terahertz Near-Field Nanospectroscopy with a HgCdTe Detector. ACS Photonics 10:4329–4339. https://doi.org/10.1021/acsphotonics.3c01148

Awards & Recognition

Moore Foundation EPI Award                                                                                  (2023)

Stony Brook Discovery Award Finalist                                                                    (2023)

NSF Career Award                                                                                                       (2021)

Seaborg Institute Research Fellowships (Los Alamos National Lab)               (2010)