I am currently a Professor of Electronic Science and Technology Department at Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing, China. I received the B.Sc. degree in Information Engineering from NUAA and the Ph.D. degree in Electromagnetic fields and Microwave Techniques from Southeast University, China in 2001 and 2009, respectively. In April. 2004, I joined the College of Electronic and Information Engineering, NUAA. I was a Visiting Scholar in the Department of Physics, College of Liberal Arts and Science at Arizona State University, USA from Dec. 2015 to Dec. 2016. I am now serving as an Advisory Panel Member for Journal of Physics D: Applied Physics since Dec. 2016 and Guest Editor of Frontiers in Physics since Oct. 2017. I have authored and coauthored over 100 refereed papers in a series of top Journals, including Advanced Science, Advanced Optical Materials, Physical Review Applied, Physical Review E, Scientific Reports, Optics Letters, Optics Express, Applied Physics Letters, Journal of Physics D: Applied Physics, Journal of Optics, JOSAB, Plasmonics, IEEE Transactions on MTT, AP and EMC.
MY LATEST RESEARCH
PROF. ZHUO LI
Office:
Tel +86 25 84896490 ext.4522
Room 522, CEIE, Jiangning Campus, 29 Jiangjun Avenue,
Nanjing, Jiangsu, P. R. China, 211106
L. L. Liu, L. Wu, J. J. Zhang, Z. Li*, B. L. Zhang* and Y. Luo*,
"Backward Phase-Matching for Second Harmonic Generation in Negative-Index Spoof Plasmonic Metamaterials",
Advanced Science 1800661, 2018
Z. Li*, L. L. Liu, H. Y. Sun, Y. H. Sun, C. Q. Gu, X. L. Chen, Y. Liu and Y. Luo,
"Effective surface plasmon polaritons induced by modal dispersion in a waveguide"
Phys. Rev. Applied 7, 044028, 2017
Backward phase matching, which describes counterpropagating fundamental and harmonic waves in a negative-index medium, is one of the most intriguing phenomena in nonlinear metamaterials. Predicted theoretically decades ago, however, it is still a challenging task to be applied for efficient second harmonic (SH) generation in a nonlinear metamaterial with ultrathin geometry and ultralow loss. Here, a negative-index spoof plasmonic metamaterial is reported, which is composed of an ultrathin symmetrical corrugated metallic strips loaded with nonlinear active devices. The simulated and measured power spectra and surface near-field distributions show that a peak SH signal can be generated at the backward phase-matched frequency point in a 120° curved surface with high efficiency, thanks to the ultrathin flexible geometry, significant confinement effect, and large propagation length of the spoof surface plasmons. The results open new technological challenges from nano- and micro-nonlinear photonics to science and engineering of compact, broadband, and efficient frequency mixing metamaterials and electromagnetic devices.
Recently, effective surface plasmon polaritons (ESPPs) induced by structural dispersion in bounded waveguides were theoretically demonstrated and experimentally verified. Despite the theoretical and experimental efforts, whether ESPPs can mimic real SPPs in every aspect still remains an open question. In this work, we go one step further to study the hybridization of ESPPs in multilayer systems. We consider transverse electric (TE) modes in a conventional rectangular waveguide and a parallel-plate waveguide (PPW) and derive analytically the dispersion relations and asymptotic frequencies of the corresponding ESPPs modes in sandwiched structures consisting of alternating dielectrics of different permittivities. Our results show that the ESPPs can be categorized into odd and even parities (owing to the ‘plasmon’ hybridization) in a similar way as natural SPPs supported by the insulator/metal/insulator (IMI) and metal/insulator/metal (MIM) heterostructures in the optical regime. The similarities and differences between ESSPs and their optical counterparts are also discussed in details, which may provide valuable guidance for future application of ESPPs at the microwave and terahertz frequencies.