新光学器件极大改善信息处理速度-凯发k8官网

新光学器件极大改善信息处理速度

文章来源：未知文章作者：enread 发布时间：2011-12-23 05:42 字体： [ ]　

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researchers have created a new type of optical device small enough to fit millions on a computer chip that could lead to faster, more powerful information processing and supercomputers. the "passive optical diode" is made from two tiny ² rings measuring 10 microns in diameter, or about one-tenth the width of a human hair. unlike other optical diodes, it does not require external assistance to transmit signals and can be readily integrated into computer chips.

the diode is capable of "nonreciprocal（单向的） transmission," meaning it transmits signals in only one direction, making it capable of information processing, said minghao qi (pronounced chee), an associate professor of electrical and computer engineering at purdue university.

"this one-way transmission is the most fundamental part of a ³ circuit, so our diodes open the door to optical information processing," said qi, working with a team also led by andrew weiner, purdue's scifres family ⁴ professor of electrical and computer engineering.

the diodes are described in a paper to be published online dec. 22 in the journal science. the paper was written by graduate students li fan, jian wang, leo varghese, hao shen and ben niu, research associate yi xuan, and weiner and qi.

although fiberoptic cables are instrumental in transmitting large quantities of data across oceans and continents, information processing is slowed and the data are ⁶ to cyberattack when optical signals must be translated into electronic signals for use in computers, and ¹ versa（反之亦然） .

"this translation requires expensive equipment," wang said. "what you'd rather be able to do is plug the ⁵ directly into computers with no translation needed, and then you get a lot of bandwidth and security."

electronic diodes constitute critical ⁷ in ⁸ and help enable integrated circuits to switch on and off and to process information. the new optical diodes are compatible with industry manufacturing processes for complementary metal-oxide-semiconductors, or cmos, used to produce computer chips, fan said.

"these diodes are very compact, and they have other attributes that make them attractive as a potential ⁹ for future photonic（光激性的） information processing chips," she said.

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收听单词发音

1
n.坏事；恶习；[pl.]台钳，老虎钳；adj.副的
参考例句：
he guarded himself against vice.他避免染上坏习惯。 they are sunk in the depth of vice.他们堕入了罪恶的深渊。

2
n.硅(旧名矽)
参考例句：
this company pioneered the use of silicon chip.这家公司开创了使用硅片的方法。 a chip is a piece of silicon about the size of a postage stamp.芯片就是一枚邮票大小的硅片。

3
n.逻辑(学)；逻辑性
参考例句：
what sort of logic is that?这是什么逻辑？ i don't follow the logic of your argument.我不明白你的论点逻辑性何在。

4
adj.卓越的，杰出的，著名的
参考例句：
elephants are distinguished from other animals by their long noses.大象以其长长的鼻子显示出与其他动物的不同。 a banquet was given in honor of the distinguished guests.宴会是为了向贵宾们致敬而举行的。

5
n.纤维，纤维质
参考例句：
the basic structural unit of yarn is the fiber.纤维是纱的基本结构单元。 the material must be free of fiber clumps.这种材料必须无纤维块。

6
adj.过敏的，敏感的；易动感情的，易受感动的
参考例句：
children are more susceptible than adults.孩子比成人易受感动。 we are all susceptible to advertising.我们都易受广告的影响。

7
联结点( junction的名词复数 )；会合点；（公路或铁路的）交叉路口；（电缆等的）主结点
参考例句：
metals which were mutually soluble would tend to give strong junctions. 可互溶的金属趋向于产生牢固的结合点。 some adhering junctions are present as narrow bands connecting two cells. 有些粘附连接以一窄带的形式连接两个细胞。

8
晶体管( transistor的名词复数 )；晶体管收音机，半导体收音机
参考例句：
in semiconductor receivers transistors take the place of vacuum tubes. 在半导体收音机中晶体管代替了真空管。 we often turn to this handbook for information on transistors. 我们常从这本手册查阅有关晶体管的资料。

9
n.组成部分，成分，元件；adj.组成的，合成的
参考例句：
each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。 blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。