研究人员发现光穿透金属的新方法
文章来源:未知 文章作者:enread 发布时间:2012-03-28 05:20 字体: [ ]  进入论坛
(单词翻译:双击或拖选)

Helping1 bridge the gap between photonics(光电) and electronics, researchers from Purdue University have coaxed2 a thin film of titanium nitride(氮化物) into transporting plasmons, tiny electron excitations coupled to light that can direct and manipulate optical signals on the nanoscale. Titanium nitride's addition to the short list of surface-plasmon-supporting materials, formerly3 composed only of metals, could point the way to a new class of optoelectronic(光电子的) devices with unprecedented4 speed and efficiency. "We have found that titanium nitride is a promising5 candidate for an entirely6 new class of technologies based on plasmonics and metamaterials," said Alexandra Boltasseva, a researcher at Purdue and an author on a paper published March 27 in the Optical Society's (OSA) open-access journal Optical Materials Express. "This is particularly compelling(引人注目的) because surface plasmons(胞质基因) resolve a basic mismatch between wavelength-scale optical devices and the much smaller components7 of integrated electronic circuits."

Metals carry electricity with ease, but normally do nothing to transmit light waves. Surface plasmons, unusual light-coupled oscillations that form on the surface of metallic8 materials, are the exception to that rule. When excited on the surface of metals by light waves of specific frequencies, plasmons are able to retain that same frequency, but with wavelengths9 that are orders-of-magnitude smaller, cramming10 visible and near-infrared light into the realm of the nanoscale.

In the world of electronics and optics, that 100-fold contraction11 is a boon12. Circuits that direct the paths of electrons operate on a much smaller scale than optical light waves, so engineers must either rely on small but relatively13 sluggish14(萧条的) electrons for information processing or bulk up to accommodate the zippy photons. Plasmons represent the best of both worlds and are already at the heart of a number of optoelectronic devices. They have not had widespread use, however, due to the dearth15 of materials that readily generate them and the fact that metals, in most cases, cannot be integrated with semiconductor16 devices.



点击收听单词发音收听单词发音  

1 helping 2rGzDc     
n.食物的一份&adj.帮助人的,辅助的
参考例句:
  • The poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
  • By doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。
2 coaxed dc0a6eeb597861b0ed72e34e52490cd1     
v.哄,用好话劝说( coax的过去式和过去分词 );巧言骗取;哄劝,劝诱
参考例句:
  • She coaxed the horse into coming a little closer. 她哄着那匹马让它再靠近了一点。
  • I coaxed my sister into taking me to the theatre. 我用好话哄姐姐带我去看戏。 来自《现代汉英综合大词典》
3 formerly ni3x9     
adv.从前,以前
参考例句:
  • We now enjoy these comforts of which formerly we had only heard.我们现在享受到了过去只是听说过的那些舒适条件。
  • This boat was formerly used on the rivers of China.这船从前航行在中国内河里。
4 unprecedented 7gSyJ     
adj.无前例的,新奇的
参考例句:
  • The air crash caused an unprecedented number of deaths.这次空难的死亡人数是空前的。
  • A flood of this sort is really unprecedented.这样大的洪水真是十年九不遇。
5 promising BkQzsk     
adj.有希望的,有前途的
参考例句:
  • The results of the experiments are very promising.实验的结果充满了希望。
  • We're trying to bring along one or two promising young swimmers.我们正设法培养出一两名有前途的年轻游泳选手。
6 entirely entirely     
ad.全部地,完整地;完全地,彻底地
参考例句:
  • The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
  • His life was entirely given up to the educational work. 他的一生统统献给了教育工作。
7 components 4725dcf446a342f1473a8228e42dfa48     
(机器、设备等的)构成要素,零件,成分; 成分( component的名词复数 ); [物理化学]组分; [数学]分量; (混合物的)组成部分
参考例句:
  • the components of a machine 机器部件
  • Our chemistry teacher often reduces a compound to its components in lab. 在实验室中化学老师常把化合物分解为各种成分。
8 metallic LCuxO     
adj.金属的;金属制的;含金属的;产金属的;像金属的
参考例句:
  • A sharp metallic note coming from the outside frightened me.外面传来尖锐铿锵的声音吓了我一跳。
  • He picked up a metallic ring last night.昨夜他捡了一个金属戒指。
9 wavelengths 55c7c1db2849f4af018e7824d42c3ff2     
n.波长( wavelength的名词复数 );具有相同的/不同的思路;合拍;不合拍
参考例句:
  • I find him difficult to talk to—we're on completely different wavelengths. 我没法和他谈话,因为我们俩完全不对路。 来自《简明英汉词典》
  • Sunlight consists of different wavelengths of radiation. 阳光由几种不同波长的射线组成。 来自辞典例句
10 cramming 72a5eb07f207b2ce280314cd162588b7     
n.塞满,填鸭式的用功v.塞入( cram的现在分词 );填塞;塞满;(为考试而)死记硬背功课
参考例句:
  • Being hungry for the whole morning, I couldn't help cramming myself. 我饿了一上午,禁不住狼吞虎咽了起来。 来自《简明英汉词典》
  • She's cramming for her history exam. 她考历史之前临时抱佛脚。 来自《简明英汉词典》
11 contraction sn6yO     
n.缩略词,缩写式,害病
参考例句:
  • The contraction of this muscle raises the lower arm.肌肉的收缩使前臂抬起。
  • The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡。
12 boon CRVyF     
n.恩赐,恩物,恩惠
参考例句:
  • A car is a real boon when you live in the country.在郊外居住,有辆汽车确实极为方便。
  • These machines have proved a real boon to disabled people.事实证明这些机器让残疾人受益匪浅。
13 relatively bkqzS3     
adv.比较...地,相对地
参考例句:
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
14 sluggish VEgzS     
adj.懒惰的,迟钝的,无精打采的
参考例句:
  • This humid heat makes you feel rather sluggish.这种湿热的天气使人感到懒洋洋的。
  • Circulation is much more sluggish in the feet than in the hands.脚部的循环比手部的循环缓慢得多。
15 dearth dYOzS     
n.缺乏,粮食不足,饥谨
参考例句:
  • There is a dearth of good children's plays.目前缺少优秀的儿童剧。
  • Many people in that country died because of dearth of food.那个国家有许多人因为缺少粮食而死。
16 semiconductor Uzuwq     
n.半导体
参考例句:
  • In the beginning,engineers hoped to use semiconductor lasers.在开始时,工程师们希望能够利用半导体激光器。
  • The main agent of the company brand semiconductor sales.本公司主要代理各品牌半导体销售。
TAG标签: light materials metals
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片