时  间：2024年04月05日（星期五）上午9:30

地  点：新楼第六会议室

报告题目：Chiral metaphotonics empowered by dielectric resonances

报 告 人：Dr. Maxim Gorkunov

主 持 人：刘新风 研究员

报告人简介：

Dr. Maxim Gorkunov Was born in 1972 in the USSR,received his MS degree in 1995 and his Ph.D. degree in 1998 from the Moscow State Engineering Physics Institute. Conducted research at the University of Osnabruck in Germany,the Australian National University,Oulu University in Finland,Strathclyde University in Scotland and Trinity College Dublin in Ireland. Currently leads the Department of Theoretical Studies of the Institute of Crystallography in Moscow. Co-authored more than 170 publications. Specializes in theory and modeling of emerging photonic materials: metamaterials and metasurfaces,liquid crystals,polymers and nanocomposites. Current interests cover dielectric metasurfaces with strong and maximum optical chirality,chiral optical resonators,sources and detectors of chiral light,as well as functional liquid-crystal photonic elements.

报告内容摘要：

  All-dielectric metasurfaces offer an ideal platform to realize chiral optical phenomena with utmost high efficiency. The key is to control the properties of photonic eigenstates by isolating them from waves of one circular polarization. This results in the maximum optical chirality when transparency to waves of one circular polarization is accompanied by resonant block of those of the opposite polarization. Such chiral eigenstate engineering is facilitated by the concept of photonic quasi-bound states in the continuum (quasi-BICs). We overview the recent progress in chiral resonant metasurfaces and categorize the palette of available chiral effects by the metastructure point symmetry. Strong near-field enhancement by chiral quasi-BICs opens broad prospects for efficient emission and detection of chiral light and its nonlinear transformations. We systematically analyze the novel types of chiral Fabry–Perot cavities that can be built from chiral metasurfaces and ordinary mirrors. Versatile chiral dielectric metasurfaces will find application in the next-generation sources and detectors of chiral light for multiplexed telecommunications and quantum optics,in the optical chiral sensors for bio-engineering and pharmaceutical industry. Chiral polaritonic states with enantiomer-specific strong coupling to vacuum in chiral cavities will potentially facilitate the chiral chemistry.