Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Illinois researchers produce two most important scientific papers

07.06.2006


Two of the five most important papers published in the 43-year history of the journal Applied Physics Letters were written by researchers at the University of Illinois at Urbana-Champaign.



Nick Holonyak Jr., a John Bardeen Chair Professor of Electrical and Computer Engineering and Physics at Illinois, was an author of both papers, which span the development of the light-emitting diode to the invention of the transistor laser.

As the American Institute of Physics celebrates its 75th anniversary this year, editors of the organization’s research journals were asked to select the five most significant papers published in each journal. In the case of Applied Physics Letters, thousands of papers were considered -- not only for scientific content, but also for the impact a paper had, or might have, on industry or the general public.


The first of Holonyak’s chosen papers appeared in the journal’s Dec. 1, 1962, issue and reported the first semiconductor laser in the visible spectrum and the first visible light-emitting diode, which formed the basis for today’s high brightness light-emitting diodes.

"This may be the most important piece of work I’ve ever done," said Holonyak, who was employed at the General Electric Co. in Syracuse, N.Y., at the time. Holonyak’s technician, Sam (Severio) Bevacqua, was the paper’s only co-author.

The second paper selected by the journal appeared in the Sept. 26, 2005, issue and reported the first room-temperature operation of a transistor laser. "I consider this a very important development and maybe -- time will tell -- a great development," Holonyak said.

In addition to Holonyak, the paper’s co-authors were electrical and computer engineering professor Milton Feng, and postdoctoral research associate Gabriel Walter and graduate research assistant Richard Chan (now at BAE Systems).

The Illinois researchers first reported the demonstration of a light-emitting, heterojunction bipolar transistor in the journal’s Jan. 5, 2004, issue. They described the first laser operation of the light-emitting transistor in the Nov. 15, 2004, issue, but at that time the transistor laser had to be chilled with liquid nitrogen to minus 73 degrees Celsius.

By demonstrating room-temperature operation, the researchers moved the transistor laser much closer to practical applications.

"Room-temperature transistor lasers could facilitate faster signal processing, large capacity seamless communications, and higher performance electrical and optical integrated circuits," said Feng, the Holonyak Chair Professor of Electrical and Computer Engineering at Illinois. Feng has received worldwide recognition for his research on heterojunction bipolar transistors. He has produced the world’s fastest bipolar transistor, a device that operates at a frequency of more than 700 gigahertz.

The transistor laser combines the functionality of both a transistor and a laser by converting electrical input signals into two output signals, one electrical and one optical.

"By incorporating quantum wells into the active region, we have enhanced the electrical and optical properties, making possible stimulated emission and transistor laser operation," said Holonyak, who also is a professor in the university’s Center for Advanced Study, one of the highest forms of campus recognition. "What we have here is a new form of transistor and a new form of laser."

The transistor laser also raises the possibility of replacing wiring between components at the chip- or board-level with optical interconnects, offering more flexibility and capability in true electronic-integrated circuits.

"Fifty-eight years after (John) Bardeen and (Walter) Brattain invented the transistor, we have hit upon something new that is surprisingly fundamental and rich in possibilities," Holonyak said. "I am happy to have had a hand in this."

James E. Kloeppel | EurekAlert!
Further information:
http://www.uiuc.edu

More articles from Physics and Astronomy:

nachricht First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science

nachricht Nuclear physicists leap into quantum computing with first simulations of atomic nucleus
24.05.2018 | DOE/Oak Ridge National Laboratory

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

When corals eat plastics

24.05.2018 | Ecology, The Environment and Conservation

Surgery involving ultrasound energy found to treat high blood pressure

24.05.2018 | Medical Engineering

First chip-scale broadband optical system that can sense molecules in the mid-IR

24.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>