Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Engineering researchers achieve organic laser breakthrough

Abstract:
Researchers at the University of Michigan have achieved a long sought-after optics phenomenon that could lead to more efficient and flexible lasers for telecommunications and quantum computing applications, among other uses.

Engineering researchers achieve organic laser breakthrough

Ann Arbor, MI | Posted on June 24th, 2010

The researchers demonstrated polariton lasing for the first time in an organic semiconductor material at room temperature. Their results are published in the June issue of Nature Photonics.

An organic material primarily contains carbon, and can sometimes have biological origin. This is in contrast to inorganic semiconductors such as silicon or gallium arsenide commonly found in modern electronic circuitry.

A polariton is not exactly a particle, but it behaves as if it were. It is a "coupled quantum mechanical state" between an excited molecule and a photon, or particle of light.

"You can think about it as two pendulums side by side tied together with a spring. They have to work together," said Stephen Forrest, principal investigator. Forrest is the William Gould Dow Collegiate Professor of Electrical Engineering, a professor in the Department of Physics and the university's vice president for research.

"This is a potential route to a whole bunch of new phenomena for new applications," Forrest said. "People have been trying to do this for about a decade—to see polariton lasing at room temperature. In my lab, my student Stephane Kena-Cohen took five years to succeed in this discovery. He had to figure out new ways to grow crystalline organic materials between highly reflective mirrors, and then to do the complicated measurements with optical pulses shorter than one-trillionth of a second."

The team is working toward building organic lasers that, like many inorganic lasers today, can be excited with electricity rather than light. So-called electrically pumped lasers are more efficient and useful than their optically pumped counterparts. But so far, organic semiconductors have been too fragile to survive exposure to the amount of electrical current necessary to get them to operate as lasers.

"We're looking at polaritons as a way to do electrical pumping of organic semiconductors at extremely low currents," Forrest said. "We still optically pumped the sample in this experiment, and the next step is to find better materials and higher quality optical cavities in order to eventually electrically pump the material into lasing."

Compared to inorganic materials, organic semiconductors offer a wider range of properties and are easier for chemists to tailor for specific purposes. Organics have untapped potential in telecommunications and computing, Forrest said.

The paper is "Room-temperature polariton lasing in an organic single-crystal microcavity." Forrest is also a professor in the Department of Materials Science and Engineering. His co-author is Stepane Kena-Cohen, a graduate student at Princeton University.

The work was conducted at the U-M Lurie Nanofabrication Facility. It is funded by Universal Display Corp. (UCD) and the Air Force Office of Scientific Research. The technology is being licensed to UCD, a company in which Forrest is a founder and member of the scientific advisory board.

####

For more information, please click here

Contacts:
Nicole Casal Moore
Phone: (734) 647-7087

Copyright © University of Michigan

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Forces of nature: Interview with microscopy innovators Gerd Binnig and Christoph Gerber August 26th, 2016

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

Stretchy supercapacitors power wearable electronics August 25th, 2016

Possible Futures

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

Nanofiber scaffolds demonstrate new features in the behavior of stem and cancer cells August 25th, 2016

Nanofur for oil spill cleanup: Materials researchers learn from aquatic ferns: Hairy plant leaves are highly oil-absorbing / publication in bioinspiration & biomimetics / video on absorption capacity August 25th, 2016

Academic/Education

AIM Photonics Announces Release of Process Design Kit (PDK) for Integrated Silicon Photonics Design August 25th, 2016

Nanotech Security Featured by Simon Fraser University: Company's Anti-Counterfeiting Technology Developed With the Help of University's 4D LABS Materials Research Institute August 21st, 2016

W.M. Keck Foundation awards Cal State LA a $375,000 research and education grant August 4th, 2016

Thomas Swan and NGI announce unique partnership July 28th, 2016

Quantum Computing

Light and matter merge in quantum coupling: Rice University physicists probe photon-electron interactions in vacuum cavity experiments August 24th, 2016

Prototype chip could help make quantum computing practical: Built-in optics could enable chips that use trapped ions as quantum bits August 9th, 2016

Diamond-based light sources will lay a foundation for quantum communications of the future: Electrified quantum diamond can become the heart of quantum networks and computers of the future August 7th, 2016

Record-breaking logic gate 'another important milestone' on road to quantum computers August 7th, 2016

Announcements

Forces of nature: Interview with microscopy innovators Gerd Binnig and Christoph Gerber August 26th, 2016

A promising route to the scalable production of highly crystalline graphene films August 26th, 2016

Graphene under pressure August 26th, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

Photonics/Optics/Lasers

Silicon nanoparticles trained to juggle light: Research findings prove the capabilities of silicon nanoparticles for flexible data processing in optical communication systems August 25th, 2016

AIM Photonics Announces Release of Process Design Kit (PDK) for Integrated Silicon Photonics Design August 25th, 2016

New theory could lead to new generation of energy friendly optoelectronics: Researchers at Queen's University Belfast and ETH Zurich, Switzerland, have created a new theoretical framework which could help physicists and device engineers design better optoelectronics August 23rd, 2016

Hexagonal boron nitride semiconductors enable cost-effective detection of neutron signals: Texas Tech University researchers demonstrate hexagonal boron nitride semiconductors as a cost-effective alternative for inspecting overseas cargo containers entering US ports August 17th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic