基于多层光学超构材料的电磁调控研究
日期：2025/09/25 – 2025/09/25
学术讲座：基于多层光学超构材料的电磁调控研究
主讲人：Tal Ellenbogen, Chair of The Department of Physical Electronics at Tel-Aviv University and head of the Laboratory for Nanoscale Electro-Optics
时间：2025年9月25日（周四）上午10:00
地点: 龙宾楼503会议室
讲座摘要
Nanostructured surfaces have emerged as a powerful platform for manipulating optical interactions, offering control capabilities beyond those of conventional optical elements. These so-called optical metasurfaces were demonstrated in a wide range of potential applications, including beam shaping, holography, imaging, polarimetry as well as frequency conversion and entangled photon generation, just to give a few examples.
In this talk, we will discuss emerging possibilities for controlling light by transitioning into multilayered metasurfaces and metamaterials. We will show examples of multispectral, multifunctional designs enabling metalenses with corrected chromatic aberrations, multifunctional optics, and optical coatings for augmented reality optics. We will then shift our focus to discuss nonlinear metasurfaces for optical frequency conversion and present ways to increase their conversion efficiency by transforming into multilayered metamaterial architectures. Specifically, the concept of form birefringent phase matching will be introduced, in both three-dimensional (3D) and 2.5-dimensional metamaterials. We will emphasize how their tailored structuring enables precise spatial control over the energy transfer of the interacting waves, enhancing the materials toolbox for nonlinear optics with potential applications in the mid-infrared. Finally, we will also present our recent work on hybrid elements, where linear refractive elements are functionalized with thin layers of nonlinear metasurfaces, opening new avenues for the development of multifunctional nonlinear hybrid optical components.
主讲人简介
Prof. Ellenbogen is the Chair of The Department of Physical Electronics at Tel-Aviv University and head of the Laboratory for Nanoscale Electro-Optics. He holds a bachelor’s degree in Physics and Computers, a Master’s degree in Physics, and a PhD in Nonlinear Optics. He was a Fulbright Postdoctoral Fellow at the School of Engineering and Applied Sciences at Harvard University where he worked on nanoplasmonics and excitonics. In addition, he was a member of The Center for Excitonics in MIT. In 2012 he joined the Department of Physical Electronics at The Tel-Aviv University School of Electrical Engineering to establish The Laboratory for Nanoscale Electro Optics. Since then he received several career awards and competitive research grants for major research contributions to the field of linear and nonlinear metamaterials, including the Kadar Family Award for Outstanding Research, Schmidt Futures, Momentum fund, ERC-STG, and ERC-COG grants, and election as 2025 Optica Fellow. His research interests include nanoscale light-matter interaction, nonlinear and ultrafast optics, and optical metamaterials and metasurfaces.