物理科学与技术学院学术报告:Manipulating Light at the Nano-Scale:Planar Metalens, Hologram and Vortex

报告题目:Manipulating Light at the Nano-ScalePlanar Metalens, Hologram and Vortex

报告人:黄坤 研究员  新加坡材料与工程研究所

时间:20178月30号(星期三)上午9:30  地点:物理科技楼405室

报告摘要

       Benefitting from the rapid development of nanotechnology, nano-scale manipulation of light in terms of its phase, amplitude, polarization and wavelength is available and opens the door to metamaterials/metasurfaces and nanophotonics. This presentation is focused on three basic problems in nanophotonics. First, focusing light into a nanoscale spot will be discussed with the theoretical prediction of its real diffraction limitation, design methods of planar metalens, experimental realization and its applications in optical super-resolution imaging and nanofabrication. Second, shaping light to reconstruct a holographic image is another hot topic including metasurface holograms and nanosieve holograms that will be presented with simulated and experimental results such as having no high-order diffraction and twin-image issues, ultra-broadband operation, large angle-of-view, high uniformity, etc. Finally, nano-structuring light with a helical wavefront related to its orbital angular momentum (OAM) provides a novel approach to realize the compact and polarization-sensitive vortex generator. The twisted focusing and continuous generation of optical OAMs will be demonstrated.

报告人简介:

黄坤,2008年毕业于武汉大学光电信息工程系,获理学学士学位;随后进入中国科学技术大学光学与光学工程系学习,提前一年(于2012年)获得理学博士学位;之后前往新加坡国立大学电子与计算机工程系从事博士后研究工作(2012.7-2015.7)。自2015.8至今,担任新加坡材料与工程研究所的研究员(Research Scientist)。2017年8月,入选中科院“百人计划”。主要从事光学、纳米光子学领域的前沿研究,研发并推广其在纳米聚焦、超分辨成像、纳米全息、光的轨道角动量操控等领域上的应用;在多个领域取得开创性成果,如,提出光聚焦的“超震荡”判据(0.38λ/NA,其比Rayleigh判据更准确地预测光的真实衍射极限),首创纳米光子筛平台用以超高精度的光操控,提出并实现首个能同时在紫外、可见和近红外工作的全息片等。近五年以第一或并列第一作者身份在Nature Communications, Advanced Materials, Laser & Photonics Reviews, Nanoscale,Advanced Optical Materials, Applied Physics Letters, Scientific Reports上发表论文10多篇,累计引用630余次(Google Scholar);同时拥有已授权专利3项。自2011年以来,担任多个著名期刊的国际同行审稿人,如Optics Letters, Optics Express, Applied Optics, J. O. S. A. a, J. O. S. A. b, Journal of Optics, Scientific Reports, J. App. Phys., J. Phys. D, IEEE. Trans. Microwave Theory and Techniques等。

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