Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > All optical transistor

Abstract:

12.11.10 - In an article appearing on November 11th in the journal Science, researchers at EPFL and the Max Planck Institute of Quantum Optics announce the discovery of a method for coupling photons and mechanical vibrations that could have numerous applications in telecommunications and quantum information technologies.

All optical transistor

Lausanne, Switzerland | Posted on November 15th, 2010

Controlling and modulating the flow of light is essential in today's telecommunications-based society. Professor Tobias Kippenberg and his team in EPFL's Laboratory of Photonics and Quantum Measurements have discovered a novel way to couple light and vibrations. Using this discovery, they built a device in which a beam of light traveling through an optical microresonator could be controlled by a second, stronger light beam. The device thus acts like an optical transistor, in which one light beam influences the intensity of another.

Their optical microresonator has two characteristics: first, it traps light in a tiny glass structure, guiding the beam into a circular pattern. Second, the structure vibrates, like a wine glass, at well-defined frequencies. Because the structure is so tiny (a fraction of the diameter of a human hair), these frequencies are 10,000 times higher than a wineglass vibration. When light is injected into the device, the photons exert a force called radiation pressure, which is greatly enhanced by the resonator. The increasing pressure deforms the cavity, coupling the light to the mechanical vibrations. If two light beams are used, the interaction of the two lasers with the mechanical vibrations results in a kind of optical "switch": the strong "control" laser can turn on or off a weaker "probe" laser just as in a electronic transistor.

"We have known for more than two years that this effect was theoretically possible," explains Max-Planck Institute scientist Albert Schliesser, but pinning it down proved difficult. "Once we knew where to look, it was right there," recalls EPFL PhD student Stefan Weis, one of the lead authors of the paper. Senior EPFL scientist Samuel Deléglise notes that "the agreement between theory and experiment is really striking."

Applications of this novel effect, baptised "OMIT" (optomechanically-induced transparency), could provide entirely new functionality to photonics. Radiation-to-vibration conversions are already widely used; in mobile phones, for example, a receiver converts electromagnetic radiation to mechanical vibration, enabling the signal to be filtered efficiently. But it has been impossible to do this kind of conversion with light. With an OMIT-based device, an optical light field could for the first time be converted into a mechanical vibration. This could open up a huge range of possibilities in telecommunications. For example, novel optical buffers could be designed that could store optical information for up to several seconds.

On a more fundamental level, researchers around the world have been trying to find ways to control optomechanical systems at the quantum level: the switchable coupling demonstrated by the EPFL-Max Planck team could help the community clear this hurdle, by serving as an important interface in hybrid quantum systems.

####

For more information, please click here

Copyright © Ecole Polytechnique Federale de Lausanne

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

International research partnership tricks the light fantastic March 2nd, 2015

UC research partnership explores how to best harness solar power March 2nd, 2015

Researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015

Important step towards quantum computing: Metals at atomic scale March 2nd, 2015

Possible Futures

European roadmap for graphene science and technology published February 25th, 2015

Quantum research past, present and future for discussion at AAAS February 16th, 2015

World’s first compact rotary 3D printer-cum-scanner unveiled at AAAS by NTU Singapore start-up: With production funded by crowdsourcing, the first unit will be delivered to the United States in March February 16th, 2015

Nanotechnology Electric Vehicle (EV) Market Analysis Report 2015: According to Radiant Insights, Inc February 13th, 2015

Academic/Education

NanoTecNexus Launches New App for Learning About Nanotechnology—STEM Education Project Spearheaded by Interns February 26th, 2015

SUNY Poly CNSE Researchers and Corporate Partners to Present Forty Papers at Globally Recognized Lithography Conference: SUNY Poly CNSE Research Group Awarded Both ‘Best Research Paper’ and ‘Best Research Poster’ at SPIE Advanced Lithography 2015 forum February 25th, 2015

KIT Increases Commitment in Asia: DAAD Funds Two New Projects: Strategic Partnerships with Chinese Universities and Communi-cation Technologies Network February 22nd, 2015

Minus K Technology Announces Its 2015 Vibration Isolator Educational Giveaway to U.S. Colleges and Universities February 18th, 2015

Quantum Computing

Forbidden quantum leaps possible with high-res spectroscopy March 2nd, 2015

Important step towards quantum computing: Metals at atomic scale March 2nd, 2015

Waterloo invention advances quantum computing research: New device, which will be used in labs around the world to develop quantum technologies, produces fragile entangled photons in a more efficient way February 16th, 2015

Quantum research past, present and future for discussion at AAAS February 16th, 2015

Announcements

International research partnership tricks the light fantastic March 2nd, 2015

UC research partnership explores how to best harness solar power March 2nd, 2015

Researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015

Important step towards quantum computing: Metals at atomic scale March 2nd, 2015

Quantum nanoscience

Important step towards quantum computing: Metals at atomic scale March 2nd, 2015

Quantum many-body systems on the way back to equilibrium: Advances in experimental and theoretical physics enable a deeper understanding of the dynamics and properties of quantum many-body systems February 25th, 2015

Quantum research past, present and future for discussion at AAAS February 16th, 2015

Exotic states materialize with supercomputers February 12th, 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







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE