【7月16日讲座】Deep-Subwavelength Reveal and Control of Chirality in Plasmonic Nanostructures

时 间2019年716(周二)

16:00

地 点物理407

主讲人方哲宇 百人计划研究员

单 位 北京大学物理学院

哲宇浙江杭州人,北京大学物理学院百人计划研究员,全国优博,基金委优青,万人计划青年拔尖人才,教育部自然科学二等奖(排名第一),主持科技部973课题。主要研究微纳光子学器件的集成与近场光学表征,在等离激元聚焦、波导、光电探测方面取得系列突破性成果,5项发明专利已授权;50余次在国际学术大会做邀请报告。在Chem. RevMater. Today等高水平学术期刊上发表论文100余篇,SCI他引5000余次,12篇论文入选ESI高被引。相关工作被Science,Nature Physics,Nature Photonics等学术期刊及新闻媒体多次亮点推荐和报导

摘要Light-matter interactions as an emerging aspect of quantum optics enable exceptional physical phenomena and advanced applications in nanophotonics through the nanoscale exploitation of photon-emitter interactions. In this talk, we introduce cathodoluminescence (CL) microscopy to detect chiroptical effects in chiral plasmonic nanostructures, as guided by the reciprocity between electron beam and plane wave excitation, and we further realize the reveal and control of chiral cathodoluminescence at subnanoscale. Besides, CL microscopy can provide better physical insight of chiroptical effects and find new chiroptical phenomena that is obscured in the near field of the nanostructure and hardly detected by far-field optical characterization methods. Moreover, chiral radiative LDOS distributions in plasmonic nanostructures can be imaged at the nanoscale by using CL nanoscopy, which directly reflect the chiral radiative spontaneous decay of quantum emitters.