Liquid Crystals with Designer 2D and 3D Molecular Orientations
报告题目：Liquid Crystals with Designer 2D and 3D Molecular Orientations
报告人：韦齐和（Liquid Crystal Institute, Kent State University）
报告摘要: Controlling molecular orientation is an essential step in manufacturing all liquid crystal devices. Many emerging of liquid crystals, such as Pancharatnam optical elements, stimuli-responsive liquid crystal polymers and programmable origami, rely on spatially non-uniform molecular orientations to achieve unique functionalities. In this talk, I will present our recent progresses in developing a new photopatterning technique based on plasmonic metamasks for aligning liquid crystal molecules into almost arbitrary 2D and 3D director fields. Unlike traditional photomasks that generate spatial modulations only in light intensity, the plasmonic metamasks allow for generating spatial modulations in both light intensity and polarization directions. This plasmonic photopatterning technique has made possible a number of applications that have never been thought before. I will show some examples on these aspects.
报告人简介: Qi-Huo Wei (韦齐和) studied in the Physics Department at Nanjing University and got his PhD in physics in 1993 under the supervision of Prof. Naiben Ming. He is currently a professor at the Liquid Crystal Institute in Kent State University, USA. He made original contributions to the basic understanding of a diverse set of topics, including single-file diffusion, plasmonic coupling in nanoparticles, Brownian motion of low symmetry colloids, and photoalignment patterning of molecular orientations. He was an Alexander von Humboldt research fellow between 1996 and 1999 and a recipient of the NSF CAREER award in 2011. His current research interest covers liquid crystal physics and material engineering, active matter, biomimetics and nanomanufacturing.