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恒元物理学讲座(第228期)


时间:2023/04/25 09:31:41作者:点击量:

报告题目:Scalable Fabrication of Plasmonic Metamaterials

报告人:Yiping Zhao 教授 (美国佐治亚大学)

报告时间:20230428日(星期五) 下午 15:00-16:30

地点: 致知楼3624


摘要:

The combination of glancing angle deposition and nanosphere lithography is a powerful nanofabrication technique to design regular arrays of plasmonic nanostructures or metamaterials. This method, referred to as nanosphere shadowing lithography, is a simple and scalable physical vapor deposition based on nanosphere monolayers due to shadowing effect. The nanostructure morphology or topology can be controlled by tuning the vapor flux directions with respect to the monolayers polarly and azimuthally as well as by alternating the deposited materials. We have designed and fabricated a series of planar and quazi-three dimensional plasmonic nanostructures with tunable plasmonic response, strong Fano resonance, or large circular dichroism response. If a two-source co-evaporation system is used, alloy or mixed composition nanostructures or even hybrid nanostructures can be created and properties of two or more materials could co-exist and adjusted. Such a simple but scalable fabrication method has a great potential for large scale metamaterial and meta-device development.

 

报告人简介:

Dr. Yiping Zhao received his B.S. degree in Electronics from Peking University in 1991, and MS degree in condensed matter physics from Institute of Semiconductors, Chinese Academy of Sciences in 1994. He obtained his Ph.D. degree in Physics at Rensselaer Polytechnic Institute in 1999. He is currently a Distinguished Research Professor at the Department of Physics and Astronomy in University of Georgia, Fellow of SPIE (the International Society of Optics and Photonics), Fellow of AVS (American Vacuum Society), and a senior member of IEEE. Prof. Zhao is the author or co-author of more than 300 peer reviewed journal papers, 30 conference proceeding papers, 3 books, 9 book chapters, and 12 US patents. His major research interests are nanostructures and thin films fabrication and characterization, plasmonic nanostructures, chemical and biological sensors, nano-photocatalysts, antimicrobial materials, nanomotors, and nanotechnology for stroke treatment.

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