11月28日上午，中国科技大学黄坤教授来访我中心实验室并做了题为“

Manipulating Light at the Nano-Scale： Lenses, Holograms and Vortice

”的学术报告。本次报告由杜路平教授主持，我中心的老师和学生都参与其中进行学习和探讨。

Abstract: 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.

Introduction of the speaker: Dr. Kun Huang is currently a research professor at University of Science and Technology of China and selected as 100-Talent Plan of Chinese Academy of Sciences. He got his bachelor’s degree (2008) in optics from Wuhan University and Ph. D. degree (2012) in optics from University of Science and Technology of China. He then (from 2012 to 2015) worked as a research fellow in National University of Singapore and a research scientist at Institute of Materials Research and Engineering, A*STAR, Singapore. His research interests are optics, nanophotonics, and their applications in optical nanofocusing, super-resolution imaging, metasurface holography, nanostructured vortex generators, and beam steering. Since 2010, he has published over 30 peer-reviewed publications (including Nature Communications, Advanced Materials, Light Science & Applications, Laser & Photonics Reviews, Advanced Functional Materials, Advanced Optical Materials, Optics Letters, Applied Physics Letters, etc) and owned four granted patents. He also serves as an international peer reviewer for Opt. Lett., Opt. Express, Sci. Rep., Appl. Opt. JOSAa, JOSAb, J. Opt., J. App. Phys. J. Phys. D., IEEE. Trans. Microwave Theory and Techniques, etc.