Leap of Topological Physics: Learning from Honeycomb Structure

  • [2017-09-27]

    Speaker: Prof. HU Xiao
    International Center for Materials Nanoarchitectonics (WPI-MANA). National Institute for Materials Science (NIMS), Tsukuba, Japan
    Time: 2017-09-27 15:00
    Place: ROOM 9004, Hefei National Laboratory Building


      Honeycomb lattice plays an extremely important role in fostering topology physics as known from the Haldane model and the Kane-Mele model [1]. Recently, we propose a way to achieve all-dielectric topological photonics starting from honeycomb structure. We identify a pseudospin degree of freedom in electromagnetic (EM) modes hosted by honeycomb lattice, which can be explored for establishing topological EM states with time-reversal symmetry [2]. We demonstrate theoretically the nontrivial topology by showing photonic band inversions, and counter-propagating edge EM waves. I will show. recent experimental results of microwaves which confirm our theory. The idea can also be applied for other bosonic systems such as phonons as well as electronic systems. Recent progresses and perspectives of the present approach will be discussed.

    [1] H.-M. Weng, R. Yu, X. Hu, X. Dai and Z. Fang, Adv. Phys. vol. 64, 227 (2015).
    [2] L.-H. Wu and X. Hu: Phys. Rev. Lett. vol. 114, 223901 (2015).

    Organizer: Hefei National Laboratory for Physical Sciences at the Microscale



Highlight of USTC

According to the latest Nature Publishing Index (NPI) Asia-Pacific and The Nature Publishing Index China, University of Science and Technology of China tops in Chinese universities again. The rankings are based on the number of papers that were published in Nature journals during the last 12 months.


This article came from News Center of USTC.