More reliable way to produce single photons

More reliable way to produce single photons
Credit: University of Bath

Physicists at the University of Bath have developed a technique to more reliably produce single photons that can be imprinted with quantum information.

The invention will benefit a variety of processes which rely on photons to carry quantum information, such as quantum computing, secure quantum communication and precision measurements at low light levels.

Photons, particles of light, can be imprinted with information to be used for things like carrying out calculations and transmitting messages. To do this you need to create individual photons, which is a complicated and difficult process.

However researchers from the Centre for Photonics and Photonic Materials have implemented a new way to improve the performance of single-photon sources using fibre-optics and fast .

They combined several individual sources of photons using optical switches, a technique called multiplexing, using fibre optics fabricated at the University. The resulting device not only makes generating more reliable but also allows control of properties of the photons created, including their colour.

Dr Robert Francis-Jones, from the Centre for Photonics and Photonic Materials, said: "Developing improved sources of single photons is one of the most pressing issues in processing. Through this research we hope to accelerate the transition of quantum-enhanced technologies from the lab to applications such as drug discovery."

The study is published in the journal Optica.


Explore further

Quantum dot LEDs that can produce entangled photons

More information: Robert J. A. Francis-Jones et al. All-fiber multiplexed source of high-purity single photons, Optica (2016). DOI: 10.1364/OPTICA.3.001270
Journal information: Optica

Provided by University of Bath
Citation: More reliable way to produce single photons (2016, November 24) retrieved 15 October 2019 from https://phys.org/news/2016-11-reliable-photons.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
917 shares

Feedback to editors

User comments

Nov 29, 2016
Particles do not exist!

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more