Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Superfast switching of quantum light sources

Cartoon of the superfast emission of a light source. The light source is embedded in an optical resonator where it spontaneously emits a photon. During the emission of the photon the favored color of the resonator is quickly switched – symbolized by a hammer to match the color of the light source. During this short interval the light source is triggered to emit an ultrashort burst of photons within a desired moment in time.
Cartoon of the superfast emission of a light source. The light source is embedded in an optical resonator where it spontaneously emits a photon. During the emission of the photon the favored color of the resonator is quickly switched – symbolized by a hammer to match the color of the light source. During this short interval the light source is triggered to emit an ultrashort burst of photons within a desired moment in time.

Abstract:
Usually, an elementary light source - such as an excited atom or molecule - emits light of a particular color at an unpredictable instance in time. Recently, however, scientists from the MESA+ Institute for Nanotechnology of the UT, FOM and the Institute for Nanoscience and Cryogenics (CEA/INAC) in France have shown that a light source can be coaxed to emit light at a desired moment in time, within an ultrashort burst. The superfast switching of a light source has applications in fast stroboscopes without laser speckle, in the precise control of quantum systems and for ultrasecure communication using quantum cryptography. The theoretical results were published in Optics Express.

Superfast switching of quantum light sources

Enschede, Netherlands | Posted on September 28th, 2013

pontaneous emission of light from excited sources, such as atoms, molecules or quantum dots, is a fundamental process with many applications in modern technology, such as LEDs and lasers. As the term 'spontaneous emission' indicates, the emission is random in nature and it is therefore impossible to predict the exact emission time of a photon. However, for several applications it is desirable to receive single photons exactly when they are needed with as little uncertainty as possible. This property is crucial for ultra-secure communication using quantum cryptography and in quantum computers. Therefore, the important goal is to fabricate a quantum light source such that it emits a single photon exactly at a desired moment in time.

Switching light emission

The average emission time of quantum light sources can be reduced by locating them in various nanostructures, like optical resonators or waveguides. But the distribution of emission times is always exponential in time in a usual stationary environment. In addition, the smallest uncertainty in the emission time is limited by both the maximum intensity in the resonator and the variations in the preparation time of the emitter. The Dutch-French team proposes to overcome these limitations by quickly switching the resonator length, in which the light source is located. The time duration of the switch should be much shorter than the average emission time. The result is that the favored color of the resonator only matches the emission color of the light source within a short time interval. Only within this short time frame are the photons emitted by the light source into the resonator.

Ultrafast light source
The researchers propose to use quantum dot light sources, which can easily be integrated in semiconductor optical resonators with lengths on the order of microns. The switching of the resonator will be achieved by shining an ultrashort laser pulse at the micropillar resonator during the emission time of the quantum dots. This quickly changes the refractive in the resonator and thereby the effective resonator length. The switching time can be directly controlled by the arrival time of the short laser pulse and by the lifetime of the excited electrons. These controlled light switches have great prospects for creating incoherent ultrafast light sources for fast stroboscopes without laser speckle, in quantum cryptography, in quantum information and for studying ultrafast cavity Quantum electrodynamics.

The team

The research has been performed by FOM postdoc Dr. Henri Thyrrestrup, Dr. Alex Hartsuiker and FOM workgroup leader Prof.dr. Willem L. Vos from the Complex Photonic Systems (COPS) Chair at the MESA+ Institute for Nanotechnology of the University of Twente in Enschede, The Netherlands, in close collaboration with Prof.dr. Jean-Michel Gérard from the Institute for Nanoscience and Cryogeny (CEA/INAC) in Grenoble, France.

####

For more information, please click here

Contacts:
Wiebe van der Veen
+31612185692

Copyright © AlphaGalileo

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 Links

Full bibliographic informationHenri Thyrrestrup, Alex Hartsuiker, Jean-Michel Gérard, and Willem L. Vos, Non-exponential spontaneous emission dynamics for emitters in a time-dependent optical cavity, Optics Express, Vol. 21, Issue 20, pp. 23130-23144 (2013):

Related News Press

News and information

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Engineer improves rechargeable batteries with MoS2 nano 'sandwich' April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 2015

Display technology/LEDs/SS Lighting/OLEDs

QD Vision Expands Product Line with Two-Millimeter Color LCD Display Optic: Color IQ™ Optic Enables Full-Color Gamut for Ultra-Thin Displays and All-in-One Computers April 16th, 2015

Light in a spin: Researchers demonstrate angular accelerating light April 15th, 2015

Roll up your screen and stow it away? Tel Aviv University researchers develop molecular backbone of super-slim, bendable digital displays March 30th, 2015

Solving molybdenum disulfide's 'thin' problem: Research team increases material's light emission by twelve times March 29th, 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

Discoveries

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Optical resonance-based biosensors designed for medical applications April 18th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Announcements

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Engineer improves rechargeable batteries with MoS2 nano 'sandwich' April 18th, 2015

Optical resonance-based biosensors designed for medical applications April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Tools

Oxford Instruments commissions high field outsert magnet system for the National High Magnetic Field Laboratory 32 Tesla magnet program April 17th, 2015

Lanthanide-Organic Framework Nanothermometers Prepared by Spray-Drying April 16th, 2015

Combined effort for structural determination April 15th, 2015

Deben reports on the research of Dr Sunita Ho from UCSF using a CCT500 tensile stage to study the behaviour of dental materials April 14th, 2015

Quantum Dots/Rods

QD Vision Expands Product Line with Two-Millimeter Color LCD Display Optic: Color IQ™ Optic Enables Full-Color Gamut for Ultra-Thin Displays and All-in-One Computers April 16th, 2015

Promising future of quantum dots explored in conference: ‘20 Years of Quantum Dots at Los Alamos’ runs April 12-16 April 13th, 2015

Next important step toward quantum computer: Scientists at the University of Bonn have succeeded in linking 2 different quantum systems March 30th, 2015

Tiny bio-robot is a germ suited-up with graphene quantum dots March 24th, 2015

Photonics/Optics/Lasers

Protein Building Blocks for Nanosystems: Scientists develop method for producing bio-based materials with new properties April 17th, 2015

Light in a spin: Researchers demonstrate angular accelerating light April 15th, 2015

Graphene pushes the speed limit of light-to-electricity conversion: Researchers from ICFO, MIT and UC Riverside have been able to develop a graphene-based photodetector capable of converting absorbed light into an electrical voltage at ultrafast timescales April 14th, 2015

Scientists create invisible objects without metamaterial cloaking April 14th, 2015

Research partnerships

Beyond the lithium ion -- a significant step toward a better performing battery April 18th, 2015

Light in a spin: Researchers demonstrate angular accelerating light April 15th, 2015

Graphene pushes the speed limit of light-to-electricity conversion: Researchers from ICFO, MIT and UC Riverside have been able to develop a graphene-based photodetector capable of converting absorbed light into an electrical voltage at ultrafast timescales April 14th, 2015

Scientists create invisible objects without metamaterial cloaking April 14th, 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