为加强我校各学科之间的学术交流，搭建教师学术交流平台，促进教师学术水平提升和跨学科合作，教师发展中心开展跨学科学术沙龙活动。

本次活动教师发展中心特别邀请了美国内华达大学Jichun Li教授，与我校师生探讨时域有限元法模拟超材料中波的传输，即物电论坛第664期。具体安排如下，欢迎感兴趣的教师和博士生参加。

一、主　题：Time-domain finite element methods for simulating wave propagation in metamaterials

二、主讲人：Prof. Jichun Li, Director of Center for Applied Mathematics and Statistics inUniversityofNevedaLas Vegas

三、时　间：2016年8月8日（周一）9:30-11:30

四、地　点：沙河校区科研楼204

五、主持人：段兆云 教授

六、承办单位：物理电子学院

七、交流内容

In 2000, a group of physicists at UC-San Diego successfully fabricated an artificial material with both negative permittivity and permeability, which leads to the so-called negative index metamaterials. Since then, due to some exotic properties (such as near field refocusing) never seen before in natural electromagnetic materials, the study of metamaterials has caught great attention of many scientists and engineers.

Mathematical modeling plays an important role in the design and application of metamaterials. For example, in October 2006, a group of researchers atDukeUniversityfound a possible way through computer simulations to fabricate the metamaterials to build a 2-D "invisibility cloak" that makes an object invisible to certain frequencies.

In this talk, I'll first give a brief introduction to metamaterials and Maxwell's equations used in electromagnetic wave propagation simulation. Then I'll introduce the Drude model (the most popular one used for metamaterials), and present some time-domain finite element methods we have been developed for simulating the backward wave propagation phenomenon. Finally, I'll present some time-domain cloaking models and our numerical simulation results.

八、主讲人简介

Jichun Li is Professor of Mathematics in University of Neveda Las Vegas (UNLV), and Director of Center for Applied Mathematics and Statistics in UNLV. Professor Li earned his Ph.D. in Mathematics (1998) fromFloridaStateUniversityand B.S in Computational Mathematics (1987) fromNanjingUniversity. He has held Post-doctoral position atUniversityofTexasatAustin. He also served as Associated Director of IPAM (Institute for Pure and Applied Mathematics) atUniversityofCalifornia-Los Angeles(UCLA), and Summer Research Faculty for U.S. Air Force Research Laboratory. His research interests include diverse topics in computational science both on numerical analysis and applications. Past work covers parallel computing, image processing, groundwater and surface water modeling, and finite element methods. Current main interest is on computational electromagnetics and metamaterials. He published one monograph in Springer Series in Computational Mathematics, one graduate textbook, and over 100 SCI journal papers. He is currently serving editorial boards for 3 international scientific computing journals.