Champaign, Ill. (UPI) Jun 15, 2009
U.S. scientists have constructed a light-emitting transistor that has set a record for a signal-processing modulation speed.
University of Illinois researchers said they achieved a speed of 4.3 gigahertz, breaking the previous record of 1.7 gigahertz held by a light-emitting diode.
Then by internally connecting the base and collector of a light-emitting transistor, they also created a new form of light-emitting diode, which modulates up to 7 gigahertz -- breaking the speed record once again.
The university and licensee Quantum Electro Opto Systems in Melaka, Malaysia, reported the fabrication and testing of the new high-speed light-emitting transistor and the new "tilted-charge" light-emitting diode.
"Simple in design and construction, the tilted-charge light-emitting diode offers an attractive alternative for use in high-speed signal processing, optical communication systems and integrated optoelectronics," said Professor Nick Holonyak Jr., who invented the first practical visible light-emitting diode more than 40 years ago.
Quantum Electro Opto Systems is a company formed by Gabriel Walter, CEO of the company, Professor Milton Feng and Holonyak to commercialize the light-emitting transistor and tilted-charge light-emitting diode technology.
The research that included graduate students Chao-Hsin Wu and Han Wui Then appears in the journal Applied Physics Letters.
Share This Article With Planet Earth
Powering The World in the 21st Century at Energy-Daily.com
Mitsubishi in talks for low-emission coal plant in Australia
Tokyo (AFP) June 12, 2009
Japan's Mitsubishi Heavy Industries is close to signing a deal with Australia's Queenlsand state to build the world's first large low-emission coal power plant, a company official said Friday. The firm will likely sign a deal with an entity affiliated with the state government and make an announcement as early as this month, the official said, speaking on condition of anonymity as the talks ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2009 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|