Novel Wave Functional Materials for Manipulating Light and Sound | School of Science - The Hong Kong University of Science and Technology

The mission of this AoE is to set up an inter-disciplinary research platform that will generate fundamental knowledge and innovation in the field of wave functional materials. More specifically, the team designs, fabricates and characterizes new materials that can manipulate light and sound in ways not known before.

New and improved existing techniques are developed for the realization of these new materials. These wave functional materials are then used to achieve interesting and unusual effects that are not possible with natural materials and explore and realize potential applications of these new materials.

Topological control of light and sound waves are completely new phenomena. Upper Panel shows a topological one-way edge state on an acoustic topological phononic crystal. Metamaterials can have optical properties not found in nature. The bottom panel shows a metamaterial with index ellipsoids not centered about zero momentum.

Press release: https://www.ust.hk/news/recognition/hkust-areas-excellence-projects-awarded-close-hk100-million-ugc-driving-world?highlight=Physics

Related research publications:

Zhang, X.L., Jiang, T. and Chan, C.T., 2019. Dynamically encircling an exceptional point in anti-parity-time symmetric systems: asymmetric mode switching for symmetry-broken modes. Light: Science & Applications, 8(1), pp.1-9.
Guo, Q., You, O., Yang, B., Sellman, J.B., Blythe, E., Liu, H., Xiang, Y., Li, J., Fan, D., Chen, J. and Chan, C.T., 2019. Observation of three-dimensional photonic dirac points and spin-polarized surface arcs. Physical Review Letters, 122(20), p.203903.
Wang, S., Hou, B., Lu, W., Chen, Y., Zhang, Z.Q. and Chan, C.T., 2019. Arbitrary order exceptional point induced by photonic spin–orbit interaction in coupled resonators. Nature communications, 10(1), pp.1-9.
Ding, K., Ma, G., Zhang, Z.Q. and Chan, C.T., 2018. Experimental demonstration of an anisotropic exceptional point. Physical review letters, 121(8), p.085702.
Zhang, X.L., Wang, S., Hou, B. and Chan, C.T., 2018. Dynamically encircling exceptional points: in situ control of encircling loops and the role of the starting point. Physical Review X, 8(2), p.021066.
Wang, S., Ma, G. and Chan, C.T., 2018. Topological transport of sound mediated by spin-redirection geometric phase. Science advances, 4(2), p.eaaq1475.
Wang, Q., Xiao, M., Liu, H., Zhu, S. and Chan, C.T., 2017. Optical interface states protected by synthetic weyl points. Physical Review X, 7(3), p.031032.
Xiao, Y.X., Ma, G., Zhang, Z.Q. and Chan, C.T., 2017. Topological subspace-induced bound state in the continuum. Physical review letters, 118(16), p.166803.
Luo, J., Yang, Y., Yao, Z., Lu, W., Hou, B., Hang, Z.H., Chan, C.T. and Lai, Y., 2016. Ultratransparent media and transformation optics with shifted spatial dispersions. Physical Review Letters, 117(22), p.223901.
Chen, W.J., Xiao, M. and Chan, C.T., 2016. Photonic crystals possessing multiple Weyl points and the experimental observation of robust surface states. Nature communications, 7(1), pp.1-10.
Ding, K., Ma, G., Xiao, M., Zhang, Z.Q. and Chan, C.T., 2016. Emergence, coalescence, and topological properties of multiple exceptional points and their experimental realization. Physical Review X, 6(2), p.021007.
Xiao, M., Chen, W.J., He, W.Y. and Chan, C.T., 2015. Synthetic gauge flux and Weyl points in acoustic systems. Nature Physics, 11(11), pp.920-924.
Xiao, M., Ma, G., Yang, Z., Sheng, P., Zhang, Z.Q. and Chan, C.T., 2015. Geometric phase and band inversion in periodic acoustic systems. Nature Physics, 11(3), pp.240-244.
Chen, W.J., Jiang, S.J., Chen, X.D., Zhu, B., Zhou, L., Dong, J.W. and Chan, C.T., 2014. Experimental realization of photonic topological insulator in a uniaxial metacrystal waveguide. Nature communications, 5(1), pp.1-7.
Xiao, M., Zhang, Z.Q. and Chan, C.T., 2014. Surface impedance and bulk band geometric phases in one-dimensional systems. Physical Review X, 4(2), p.021017.
Wang, S.B. and Chan, C.T., 2014. Lateral optical force on chiral particles near a surface. Nature communications, 5(1), pp.1-8.

Che Ting CHAN

陳子亭

(852) 2358 7487

phchan@ust.hk

Associate Vice-President for Research and Development (Research)
Daniel C K Yu Professor of Science
Chair Professor, Department of Physics
Director of Research Office

Faculty Profile

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