Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

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

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

The 16th Trends in Nanotechnology International Conference (TNT 2015) unveils 25 Keynote Speakers: Call for abstracts open April 27th, 2015

Graphenea celebrates fifth anniversary April 27th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Possible Futures

Printing Silicon on Paper, with Lasers April 21st, 2015

A glass fiber that brings light to a standstill: By coupling photons to atoms, light in a glass fiber can be slowed down to the speed of an express train; for a short while it can even be brought to a complete stop April 9th, 2015

Nanotechnology in Medical Devices Market is expected to reach $8.5 Billion by 2019 March 25th, 2015

Nanotechnology Enabled Drug Delivery to Influence Future Diagnosis and Treatments of Diseases March 21st, 2015

Academic/Education

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Iranian Female Professor Awarded UNESCO Medal in Nanoscience April 20th, 2015

JPK reports on the use of the NanoWizard® 3 AFM system at the Hebrew University of Jerusalem April 14th, 2015

UK National Graphene Institute Selects Bruker as Official Partner: World-Leading Graphene Research Facility Purchases Multiple Bruker AFMs April 7th, 2015

Quantum Computing

NIST tightens the bounds on the quantum information 'speed limit' April 13th, 2015

Electrical control of quantum bits in silicon paves the way to large quantum computers: Breakthrough by Australian-led team should make the construction of large-scale quantum computers more affordable April 11th, 2015

OU physicists first to create new molecule with record-setting dipole moment April 4th, 2015

Quantum teleportation on a chip: A significant step towards ultra-high speed quantum computers April 1st, 2015

Announcements

Scientists join forces to reveal the mass and shape of single molecules April 27th, 2015

The 16th Trends in Nanotechnology International Conference (TNT 2015) unveils 25 Keynote Speakers: Call for abstracts open April 27th, 2015

Graphenea celebrates fifth anniversary April 27th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Photonics/Optics/Lasers

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

Quantum 'paparazzi' film photons in the act of pairing up April 22nd, 2015

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