JI Wei

Professor of Physics
Vice Dean (Graduate Programmes)

• His research areas cover nonlinear optics, ultrafast pulse spectroscopy , nanophotonics, nonlinear optical materials, optical limiting, and optical switching. He has co-authored nearly 100 papers published in scientific journals, and made over 50 conference presentations. His research papers have been cited over 1500 accumulatively.

• Major contributions that he has made are his pioneering works on optical limiting with metal clusters and carbon nanotubes. Currently, his research interest is focused on both ultrafast optical nonlinearities and photo-dynamics of nano-materials like polymers, semiconductor quantum dots and carbon nanotubes.

• Rational synthesis, self-assembly, and optical properties of PbS-Au heterogeneous nanostructures via preferential deposition  Yang J, Elim HI, Zhang QB, Lee JY and Ji W, Journal of the American Chemical Society 128 (36): 11921-11926 SEP 13 2006.

• Optical limiting properties of metal nanowires [PDF], H. Pan, W. Chen, Y. Feng, W. Ji, and J. Lin, Applied Physics Letters 88, 223106 (2006), and the June 12, 2006 issue of Virtual Journal of Nanoscale Science and Technology. And it is also featured by the August issue of Photonics Spectra

• Three-photon absorption in water-soluble ZnS nanocrystals [PDF], J. He, W. Ji, J. Mi, Y. Zheng, and J. Y. Ying, Applied Physics Letters 88, 18114 (2006), and the May 22, 2006 issue of Virtual Journal of Nanoscale Science and Technology, and the June 2006 issue of Virtual Journal of Ultrafast Science.

• Observation of Saturable and Reverse Saturable Absorption at Longitudinal Surface Plasmon Resonance in Gold Nanorods [PDF], H. I. Elim, J. Yang, J. Y. Lee, J. Mi, and W. Ji, Applied Physics Letters 88, 083107 (2006), and the March 6, 2006 issue of Virtual Journal of Nanoscale Science and Technology.

• Ultrafast absorptive and refractive nonlinearities in multiwalled carbon nanotube films. H. I. Elim, W. Ji, G. H. Ma, K. Y. Lim, C. H. Sow, and C. H. A. Huan, Applied Physics Letters 85, 1799 (2004) and the Sept 2004 issue of Virtual Journal of Ultrafast Science.

• Ultrafast optical nonlinearity in poly(methylmethacrylate)-TiO 2 nanocomposites. H. I. Elim, W. Ji, A. H. Yuwono, J. M. Xue, and J. Wang, Applied Physics Letter 82, 2691 (2003), and the May 2003 issue of Virtual Journal of Ultrafast Science.

• Electronic structure and optical limiting behavior of carbon nanotubes. Chen P, Wu X, Sun X, Lin J, Ji W, Tan KL, Physical Review Letters 82 (12): 2548-2551, March 22 (1999)

• Broadband optical limiting with multiwalled carbon nanotubes. Sun X, Yu RQ, Xu GQ, Hor TSA, Ji W, Applied Physics Letters 73 (25): 3632-3634 DEC 21 (1998), Times.

• Synthesis and Optical Limiting Capability Of Cubane-Like Mixed-Metal Clusters (NBU(4)N)(3)[MOAG(3)BRX(3)S(4)] (X=CL AND I) . Shi S, Ji W, Tang SH, Lan JP, Xin SQ, Journal of the American Chemical Society 116 (8): 3615-3616, April 20 1994.