73882必赢网页版(中国)欧洲杯

Research

Computational & Applied Math Seminar

On a model of surface imaging with double negative metamaterial

Speaker: Yuliang Wang (Beijing Normal University)
Time: Sep 22, 2021, 15:00-16:00
Location: Tencent Meeting ID 219 228 299

Abstract

We consider the problem of imaging a periodic surface by acoustic or electromagnetic waves. A slab of double negative metamaterial is placed above the surface and the scattered field is measured on the top boundary of the slab. The imaged surface is assumed to be a small perturbation of the flat surface so that we can make a transformed field expansion to linearize the problem and obtain a simple reconstruction formula. We show by analysis of the formula and numerical experiments that the resolution of the reconstruction can be greatly enhanced due to the double negative slab.