今天是: PRL发表声学研究所刘晓峻教授课题组最新研究成果   近代声学教育部重点实验室2015年度开放课题申请通知   程建春课题组在Appl. Phys. Lett.发表封面文章   AIP报道刘晓峻教授课题组在声学零密度材料方面的最新工   《自然·材料》发表我所刘晓峻教授课题组最新研究成果  
站内搜索:
 
  学术交流
  学术报告
  开放课题
  学术会议
  专家来访
  出国交流
  兼职教授
  合作成果
  学术报告
 您当前位置:南京大学声学研究所 >> 学术交流 >> 学术报告 >> 浏览文章
 
学术报告:Coherent wave control with electromagnetic and acoustic metamaterials
发布人:佚名 信息来源:本站原创  发布时间:2016年01月05日 点击数量:

 
题  目:  Coherent wave control with electromagnetic and acoustic metamaterials
报告人 Prof.  Jensen Li
                School of Physics and Astronomy,
                University of Birmingham, United Kingdom
时  间: 17(星期四) 上午10:00
地  点: 物理楼356


 
     : Incident waves of different propagation directions, polarizations or time delays can be tuned to have constructive and destructive interference in controlling a series of coherent wave phenomena. Due to the recent advent of metamaterials with very flexible constitutive parameters, we are now able to tune wave-matter interaction in a very precise manner, bringing us new opportunities in coherent control and dynamically tunable devices. In this talk, we begin by showing metamaterials with resonating magnetic response in optics, or equivalently resonating density response in acoustics, allow us to demonstrate coherent perfect absorption (CPA) with a pair of out-of-phase incident waves. Furthermore, by coupling metamaterial atoms with resonance of different natures, a parity-time phase transition of CPA can be realized. These investigations will be useful for designing tunable metamaterial devices by simply tuning multiple inputs with high sensitivity. In the second part of this talk, we will extend the scheme of coherent control to metasurface with a gradient profile of metamaterial atoms. We will demonstrate a polarization-enabled holographic interface in coupling far-field incident light to arbitrary surface wave profiles on a metasurface. A linearly polarized incident light with rotating polarization angle can be used to play a motion picture of orbital motion of the surface waves.
 
 上一篇文章:没有了 下一篇文章:学术报告:水声理论建模、数据获取及应用
 
联系我们 | 声学所简介 | 英才招聘 | 版权声明
Copyright 2003-2015 南京大学声学aa研究所 All Rights Reserved
地址:中国江苏 南京市汉口路22号  邮编:210093 Tel:025-83592385 Email:postsndi@nju.edu.cn