纳米“隐身衣”问世 　
 　
    据新华社、中国日报 
 　
 　
　　华裔科学家成功借助新型材料隐藏三维物体 

　　常常在小说等虚幻世界里出现的“隐身衣”，将有可能出现在我们的现实世界里。由美加州大学伯克利分校华裔科学家张翔教授带领的小组，成功借助新型材料隐藏三维物体。 
　　这种新型材料可在纳米尺度上让可见光弯曲，达到隐藏三维物体的效果。从理论上讲，同样的原理在正常尺度下也应该能实现。因此，将来有可能用这种材料制成“隐身衣”。 

　　原理：让光线“绕着走” 

　　这一最新成果将发表在15日出版的《科学》杂志和14日出版的《自然》杂志上。研究人员10日说，他们研制的这种新材料在纳米尺度上可以使三维空间内的可见光弯曲，也就是说照射在这种材料上的可见光不能像正常情况下那样偏折，人眼也就无法“看到”它。 

　　人之所以能看到物体，是因为物体阻挡了光波通过。“在实现隐藏功能方面，这种材料需要把物体周围的光波实现完全弯曲，好像河水流过岩石一样，光线就似乎没有受到任何阻挡，”张翔说，“在观察者看来，物体就似乎变得不存在了，也就实现了视觉隐形。” 

　　军方很感兴趣 

　　近些年来，研究人员曾合成出类似的具有负折射率的“超级材料”，试图利用材料特殊的光学特性，使光弯曲。但先前的研究成果均存在局限性。比如，有的只能使微波（波长大约在1毫米至1米之间）光线弯曲，而这个波长范围内的光线对人眼来说原本就不可见 
。有的则只能使光线实现二维弯曲，而不是完全隐形。 
　　最新研制的这种“超级材料”在纳米尺度上实现了可见光的三维弯曲。这被看作是“超级材料”领域的突破性进展。科研小组说，这一新材料可用于开发“超级透镜”，能够让人们看清小到一个分子的目标。 
　　这项研究由美国军方和美国国家科学基金会资助，军方对研发新一代隐蔽技术尤为感兴趣。张翔表示，这项研究预计会先应用于军事上。 


　　人物简介 

　　张翔：美籍华人，祖籍南京，毕业于南京大学，1989年赴美留学，1996年获美国加州大学伯克利分校博士学位，现任美国加州大学伯克利分校Chancellor’s Professor。 美国NSF Nano-scale Science and Engineering Center (NSEC)主任。
　　张翔教授获奖无数，在2004年，他得到了科学界的最高奖项——世纪科技奖。



个人主页：
http://www.me.berkeley.edu/faculty/zhang/

个人简介：http://www.me.berkeley.edu/faculty/zhang/bio.pdf

Professor Xiang Zhang
Professor Xiang Zhang is Chancellor’s Professor at UC Berkeley and the Director
of NSF Nano-scale Science and Engineering Center (NSEC) which includes Berkeley-
Stanford-UCLA-UCSD-UNCC. He also serves as Director of Department of Defense
MURI Center on Metamaterials and Devices that includes Berkeley-MIT-UCLA-UCSDDuke-
Imperial College (UK).

Professor Zhang’s current research focused on nano-scale science and
technology, meta-materials, nano-photonics and bio-technologies. He has published more
than 80 technical papers including publications in Science and Nature Materials. He has
given over 80 invited or keynote talks at international conferences and institutions.
Professor Zhang is on editorial boards of three journals. He is a co-chair of NSF
Nanoscale Science and Engineering Annual Grantee Conference in 2004-2005, Chair of
Technical Program of IEEE 2nd International Conference on Micro and Nano Engineered
and Molecular Systems in 2007.

Professor Zhang’s research has been selected to be one of Top Ten
Nanotechnology Breakthroughs in 2005, and Fast Breaking Papers, as one of the most
cited recent papers in Physics in 2006, and R&D Magazine’s top 25 the Most Innovative
Products of 2006. He was selected as a Finalist for the 2005 Small Times Magazine 2005
Small Tech Best Researcher Award. His research was frequently featured by media such
as MRS Bulletin (Materials Research Society), Laser Focus World, Photonics Spectra,
Materials Today, Physics Web, San Jose Business Journal, R&D Magazine, as well as
international media including BBC News, UK, Better Humans, Canada, The Hindu, India.
Professor Zhang is a recipient of NSF CAREER Award (1997); Engineering Foundation
Award (1997); SME Dell K. Allen Outstanding Young Manufacturing Engineer Award
(1998) and ONR Young Investigator Award (1999). He was nominated in 2004 for the
Millennium Technology Prize, the world’s largest technology award. He was selected as a
“Distinguished Lecturer” at University of Texas at Austin in 2004 and SEMETECH in
2005.

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强悍啊！

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