Theme: Metaphotonics and Metasurfaces

Speaker: Yuri Kivshar, Australian National University, Canberra, Australia

Time: Thursday, October 31, 1:30PM

Venue: Dingxin Lecture Hall, Main Campus, JLU

Host: JLU Association for Science and Technology

Organizers: JLU International Center of Future Science, JLU Office of Global Engagement, JLU Graduate School, JLU College of Physics, JLU College of Electronic Science & Engineering, JLU College of Communication Engineering

Abstract

Metamaterials---artificial electromagnetic media that are structured on the subwavelength scale---were initially suggested for the realisation of negative-index media, and later they became a paradigm for engineering electromagnetic space and control?ling propagation of waves. However, applications of metamaterials in optics are limited due to inherent losses in metals employed for the realisation of artificial optical magnetism. Recently, we observe the emergence of a new field of all-dielectric Mie-resonant metaphotonics aiming at the manipulation of strong optically-induced electric and magnetic Mie-type resonances in dielectric and semiconductor nanostructures with relatively high refractive index. Unique advantages of dielectric resonant nanostructures over their metallic counterparts are low dissipative losses and the enhancement of both electric and magnetic fields that provide competitive alternatives for plasmonic structures including optical nanoantennas, efficient biosensors, passive and active metasurfaces, and functional metadevices. This talk will summarize the recent advances in all-dielectric Mie-resonant metaphotonics including active photonics as well as the recently emerged fields of biosensing and topological photonics.

Introduction of Yuri Kivshar

Prof. Kivshar is a world leader in nonlinear physics, nonlinear photonics, and physics of metamaterials known as one of the “Most Cited Scientists in Physics” (ISI: h=93 with 40930 citations, Google Scholar: h=122 with 71370 citations) who published many high-impact papersin Physical Review Letters(83 papers) and Nature-family journals (15 papers). The main contributions of Prof Kivshar to nonlinear physics and photonics include many pioneering results on nonlinear localized modes in optical systems, optical solitons and vortices, the study of localization in discrete systems and nonlinear effects in plasmonics and metamaterials. Many of his results have been summarized in 5 books, and his pioneering works on localization were highlighted in an invited article in Physics Today 57, 43 (2004) and three review papers in Rev. Mod. Phys. (IF=44.982).Prof. Kivshar has held two consecutive Federation Fellowships granted by the Australian Research Council (ARC), which provided him with the opportunity for full-time research. These fellowships boosted enormously his research potential, creativity and productivity. The first Federation Fellowship helped Prof. Kivshar to establish the Nonlinear Physics Centre (NLPC) with active theoretical and experimental programs in nonlinear optics of periodic media closely connected with the ARC Centre of Excellence for Ultrahigh Bandwidth Devices for Optical Systems CUDOS (established in 2003 for eight years and then funded for another seven years from 2011). Prof. Kivshar’s second Federation Fellowship helped him to develop strong experimental programs in metamaterials and, more recently, in nonlinear nanophotonics and all-dielectric metamaterials. Through his leadership and own research support, including ARC Discovery and Linkage grants, Prof. Kivshar established the world leading theoretical and experimental group at NLPC and major experimental infrastructure for nonlinear optics and nanophotonics research, including ultrafast laser systems and related characterisation capabilities, as well as Scanning Near-field Optical Microscope with spectral capabilities and sub-100nm spatial resolution that provides new opportunities to carry out cutting-edge experimental research and develop new experimental techniques. Many research projects and publications of NLPC over the last 5 years are either experimental or include both theoretical and experimental studies. The recent experimental achievements of the NLPC team include the first generation of Airy plasmons (highlighted by American Physical Society), the first observation of vortices in liquid crystals (highlighted by Optical Society of America), fabrication of a new generation of out-of-plane metamaterials (highlighted by Nature Photonics), the first prediction and demonstration of Fano resonances in Si oligomers (published in Nano Letters and Small), and the fastest switching at the nanoscale (Nano Letters, 2015). The NLPC team collaborates actively with many experimental groups and hosts numerous visiting researchers.