Nanotechnology Now

Our NanoNews Digest Sponsors


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

Oxford Instruments and Dresden High Magnetic Field Laboratory collaborate to develop HTS magnet technology components for high field superconducting magnet systems June 29th, 2016

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Display technology/LEDs/SS Lighting/OLEDs

GraphExeter illuminates bright new future for flexible lighting devices June 23rd, 2016

New nanomaterial offers promise in bendable, wearable electronic devices: Electroplated polymer makes transparent, highly conductive, ultrathin film June 13th, 2016

Graphene-based transparent electrodes for highly efficient flexible OLEDS: A Korean research team developed an ideal electrode structure composed of graphene and layers of titanium dioxide and conducting polymers, resulting in highly flexible and efficient OLEDs June 5th, 2016

Nanotubes are beacons in cancer-imaging technique: Rice University researchers use spectral triangulation to pinpoint location of tumors May 21st, 2016

Quantum Computing

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Particle zoo in a quantum computer: First experimental quantum simulation of particle physics phenomena June 23rd, 2016

CWRU physicists deploy magnetic vortex to control electron spin: Potential technology for quantum computing, keener sensors June 21st, 2016

Researchers refine method for detecting quantum entanglement June 18th, 2016

Discoveries

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Yale researchers’ technology turns wasted heat into power June 27th, 2016

Announcements

Oxford Instruments and Dresden High Magnetic Field Laboratory collaborate to develop HTS magnet technology components for high field superconducting magnet systems June 29th, 2016

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

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

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

Building a smart cardiac patch: 'Bionic' cardiac patch could one day monitor and respond to cardiac problems June 28th, 2016

New, better way to build circuits for world's first useful quantum computers June 28th, 2016

Yale researchers’ technology turns wasted heat into power June 27th, 2016

Tools

Oxford Instruments and Dresden High Magnetic Field Laboratory collaborate to develop HTS magnet technology components for high field superconducting magnet systems June 29th, 2016

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

FEI Launches Helios G4 DualBeam Series for Materials Science: The Helios G4 DualBeam Series features new capabilities to enable scientists and engineers to answer the most demanding and challenging scientific questions June 27th, 2016

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Quantum Dots/Rods

A new form of hybrid photodetectors with quantum dots and graphene June 19th, 2016

Supercrystals with new architecture can enhance drug synthesis May 24th, 2016

ORNL demonstrates large-scale technique to produce quantum dots May 21st, 2016

First single-enzyme method to produce quantum dots revealed: Biological manufacturing process, pioneered by three Lehigh University engineers, produces equivalent quantum dots to those made chemically--but in a much greener, cheaper way May 9th, 2016

Photonics/Optics/Lasers

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Russian physicists create a high-precision 'quantum ruler': Physicists have devised a method for creating a special quantum entangled state June 25th, 2016

Marrying superconductors, lasers, and Bose-Einstein condensates: Chapman University Institute for Quantum Studies (IQS) member Yutaka Shikano, Ph.D., recently had research published in Scientific Reports June 20th, 2016

A new trick for controlling emission direction in microlasers June 20th, 2016

Research partnerships

Superheroes are real: Ultrasensitive nonlinear metamaterials for data transfer June 25th, 2016

Soft decoupling of organic molecules on metal June 23rd, 2016

FEI and University of Liverpool Announce QEMSCAN Research Initiative: University of Liverpool will utilize FEI’s QEMSCAN technology to gain a better insight into oil and gas reserves & potentially change the approach to evaluating them June 22nd, 2016

Tailored DNA shifts electrons into the 'fast lane': DNA nanowire improved by altering sequences June 22nd, 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