Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > CNST Researchers Demonstrate Electo-Optic Modulation of Single Photons from a Quantum Dot

Abstract:
In a recent article in Applied Physics Letters,* CNST researchers demonstrated how commercially available electro-optic modulators can be used to tailor the single photon output of quantum dots (QDs) for use in broadband quantum memories and other systems. Nanoscale light-emitters such as semiconductor QDs are leading candidates for the stable generation of single photons "on demand" for use in communications, information processing, and metrology. To create such photons, a train of laser pulses can be used to optically excite a single, epitaxially-grown semiconductor QD, which then emits a train of single photon pulses.

CNST Researchers Demonstrate Electo-Optic Modulation of Single Photons from a Quantum Dot

Gaithersburg, MD | Posted on June 29th, 2011

However, the temporal profile of these single photon pulses, described as a photon wave packet, is typically not ideal for use in quantum information processing. Using commercial, high-performance telecommunications electro-optic modulators, the researchers were able to temporally manipulate these wave packets to produce a variety of shapes, including optimally-shaped Gaussian pulses. Compared to previous work, this approach reduced the modulation timescale more than two orders of magnitude, reaching the sub-nanosecond regime needed for semiconductor QDs. Finally, the researchers proposed that such electro-optic modulation may be a method for improving the quality of single photons from existing QD sources. Because of decoherence, single photons generated by a QD are not identical, and instead have different wave packets. Electro-optic modulation could be a flexible and spectrally broadband way to select for the decoherence-free portion of the QD emission, and thereby improve the photon indistinguishability needed for quantum information processing applications.

*Subnanosecond electro-optic modulation of triggered single photons from a quantum dot, M. T. Rakher and K. Srinivasan, Applied Physics Letters 98, 211103 (2011).

####

For more information, please click here

Contacts:
Kartik Srinivasan
301-975-5938

Copyright © NIST

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

Nanoparticles Increase Durability of Concrete Decorations in Cold Areas January 26th, 2015

Iranian Researchers Boost Solar Cells Efficiency Using Anti-Aggregates January 26th, 2015

Detection of Heavy Metals in Samples with Naked Eye January 26th, 2015

Engineering self-assembling amyloid fibers January 26th, 2015

Discoveries

Visualizing interacting electrons in a molecule: Scientists at Aalto University and the University of Zurich have succeeded in directly imaging how electrons interact within a single molecule January 26th, 2015

Electronic circuits with reconfigurable pathways closer to reality January 26th, 2015

Nanoparticles Increase Durability of Concrete Decorations in Cold Areas January 26th, 2015

Iranian Researchers Boost Solar Cells Efficiency Using Anti-Aggregates January 26th, 2015

Announcements

Nanoparticles Increase Durability of Concrete Decorations in Cold Areas January 26th, 2015

Iranian Researchers Boost Solar Cells Efficiency Using Anti-Aggregates January 26th, 2015

Detection of Heavy Metals in Samples with Naked Eye January 26th, 2015

Engineering self-assembling amyloid fibers January 26th, 2015

Quantum Dots/Rods

Rice-sized laser, powered one electron at a time, bodes well for quantum computing January 15th, 2015

Shining a light on quantum dots measurement January 15th, 2015

Carbon Nanotubes Increase Efficiency of Solar Cells January 12th, 2015

TCL 55” Quantum Dot TV with Color IQ™ Optics Debuts at CES 2015: TVs with OLED-quality color at an affordable price coming soon to the US and Europe January 5th, 2015

Quantum nanoscience

Graphene brings quantum effects to electronic circuits January 22nd, 2015

Nano-beaker offers insight into the condensation of atoms January 21st, 2015

Atoms can be in 2 places at the same time: Researchers of the University of Bonn have shown that cesium atoms do not follow well-defined paths January 20th, 2015

Two or one splashing? It's different! Physicist at the University of Bonn observe light-matter interaction with two atoms for the first time January 16th, 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