CnanoBlog

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Chinese First Scientific WebBlog on Nano, from USTC, to You. IBM Create World Smallest Light Emitter Time: 2003-05-08 http://www.research.ibm.com/resources/news/20030501_cntle.shtml http://www.sciencemag.org/cgi/content/full/300/5620/783 Electrically Induced Optical Emission from a Carbon Nanotube FET J. A. Misewich,* R. Martel, Ph. Avouris, J. C. Tsang, S. Heinze, J. Tersoff Polarized infrared optical emission was observed from a carbon nanotube ambipolar field-effect transistor (FET). An effective forward-biased p-n junction, without chemical dopants, was created in the nanotube by appropriately biasing the nanotube device. Electrical measurements show that the observed optical emission originates from radiative recombination of electrons and holes that are simultaneously injected into the undoped nanotube. These observations are consistent with a nanotube FET model in which thin Schottky barriers form at the source and drain contacts. This arrangement is a novel optical recombination radiation source in which the electrons and holes are injected into a nearly field-free region. Sucha source may form the basis for ultra small integrated photonic devices. IBM Research Division, IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598¨C0218, USA.

• Present address: Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA. IBM scientists simultaneously inject positive and negative charges into a carbon nanotube through the source and drain electrodes at its two ends. When the electrons and holes meet in the nanotube, they neutralize each other and generate light. Posted by nano @ 2003-05-08 23:35 Comments Add Comment Last update Cobalt breaks magnetism record Giant Magnetic Anisotropy of Single Cobalt Atoms and Nanoparticles nanoscience & technology conference Scientists make waves with terahertz device ¡¾Í¼ÎÄ¡¿·ÉÃ뼤¹âÇÐÏ÷¼Ó¹¤¼¼Êõ½«½øÈëʵÓý׶ΠNew PRL paper by W. Ho Novel carbon nanostructures bond together Complex fluids: Spread the word about nanofluids ¡¾Í¼ÎÄ¡¿ÈÕ±¾ÐÅ´óºÍÈý¾®ºÏ³ÉÖ±¾¶×îС̼ÄÉÃ×¹Ü IBM Create World Smallest Light Emitter This website is: LOGO Links: