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        Jensen T H Li, PhD

        Assistant Professor 

    Contact Information:

    Department of Physics and Materials Science,
    City Universtiy of Hong Kong
    Tat Chee Avenue,
    Hong Kong SAR,
    Tel:  +852 27889978
    Fax: +852 27887830
    Email: jensen.li@cityu.edu.hk

       [Photo of Jensen Li]
    Dr Jensen Li received his BEng degree (First Class Honors) in electrical and electronic engineering from University of Hong Kong and his PhD degree in physics with Prof C T Chan in Hong Kong University of Science and Technology in 2004. Before joining City University of Hong Kong, he worked on metamaterials and invisibility cloak with Prof Sir John Pendry in Imperial College London, and with Prof Xiang Zhang at the University of California at Berkeley. His research interests include metamaterials/plasmonics, photonic crystals, transformation optics and artifical acoustic materials.
    Research Interest:
    Metamaterials and Plasmonics
    Localized resonance of artificial atoms is a very flexible building block for engineered optical materials. These metamaterials give rise to physical properties like a negative refractive index which is beyond the capabilities of natural materials.
    Transformation Optics
    An emerging way to manipulate light at all distances down to the nano-scale driven by curved coordinate transformations. Invisibility cloaks, ultra-powerful microscopes and light concentrators for solar cell applications are only some of the possibilities in this area.
    Acoustic Metamaterials
    Many principles and ideas in electromagnetic metamaterials can be extended to acoustics, giving rise to rich phenomena and novel applications like a negative mass density, negative modulus and acoustic sub-diffractional imaging. We need to develop physical understandings and the feasible ways to construct the corresponding materials.
    Selected Publications:
    • J. Li*, L. Fok*, X. Yin, G. Bartal and X. Zhang, "Experimental Demonstration of an Acoustic Magnifying Hyperlens" (submitted)
    • J. Li, S. Han, S. Zhang, G. Bartal and X. Zhang, "Controlling Fourier Space with Transformation Optics" (submitted)
    • J. Valentine*, J. Li*, T. Zentgraf*, G. Bartal and X. Zhang, ˇ§An optical cloak make of dielectricsˇ¨, Nature Materials 8, 568 (2009). (Cover story of Nature Materials)
    • S. Zhang, Y. Park, J. Li, X. Lu, W. Zhang and X. Zhang, ˇ§Negative refractive index in chiral metamaterialsˇ¨, Phys. Rev. Lett. 102, 023901 (2009).
    • J. Li and J. B. Pendry, ˇ§Hiding under the carpet: a new strategy for cloakingˇ¨, Phys. Rev. Lett. 101, 203901 (2008). (PRL Editorˇ¦s Suggestion, highlighted in Nature Photonics)
    • J. B. Pendry and J. Li, ˇ§An acoustic metafluid: realizing a broadband acoustic cloakˇ¨, New J. Phys. 10, 115032 (2008).
    • J. Li and C. T. Chan, ˇ§Optical properties of photonic crystals composed of metal-coated spheresˇ¨, Phys. Rev. B 73, 075117 (2006).
    • D. Wang, J. Li, C. T. Chan, V. Salgueiriño-Maceira, L. M. Liz-Marzán, S. Romanov, and F. Caruso, ˇ§Optical Properties of Nanoparticle-Based Metallodielectric Inverse Opalsˇ¨, Small 1, 122 (2005).
    • J. Li and C. T. Chan, "Double-negative Acoustic Metamaterial", Phys. Rev. E 70, 055602(R) (2004). (cited 47 times)
    • J. Li, L. Zhou, C. T. Chan and P. Sheng, ˇ§Photonic band gap from a stack of positive and negative index materialsˇ¨, Phys. Rev. Lett. 90, 083901 (2003). (cited 198 times)
    Book Chapters
    • J. Li, K. H. Fung, Z. Y. Liu, P. Sheng and C. T. Chan, ˇ§Generalizing the Concept of Negative Medium to Acoustic Wavesˇ¨ in PHYSICS OF NEGATIVE REFRACTION AND NEGATIVE INDEX MATERIALS (Editor: C. M. Krowne and Y. Zhang), Springer, 2007.
    • Planar band gap materials, US Patent 6,727,863 (2004)
    Croucher Foundation Postdoctoral Fellowship (2005-2007)
    Related Links:
    Research works in Jensen's group
    Positions available:
    Postdoctoral and PhD positions are available. We seek self-motivated candidates with solid scientific background in one of the following areas: engineering, physics and materials science.

    Experience in the following areas is desirable:
    ˇE Plasmonics, metamaterials and Transformation Optics
    ˇE Acoustic/Photonic Band-gap Materials
    ˇE Optical instrumentation and characterizations
    ˇE Micro-nanofabrication
    ˇE EM wave/Elastic wave simulations

    Applicants should send a full CV via email to jensen.li@cityu.edu.hk.