Featured Research

from universities, journals, and other organizations

Single quantum dot nanowire photodetectors

Date:
December 16, 2010
Source:
American Institute of Physics
Summary:
Moving a step closer toward quantum computing, researchers recently fabricated a photodetector based on a single nanowire, in which the active element is a single quantum dot with a volume of a mere 7,000 cubic nanometers.

This image shows the photocurrent from the nanowire detector (the yellow spot represents the region where current is generated under illumination) and the electrical contacts are indicated in blue, while the nanowire is indicated in green.
Credit: Zwiller

Moving a step closer toward quantum computing, a research team in the Netherlands recently fabricated a photodetector based on a single nanowire, in which the active element is a single quantum dot with a volume of a mere 7,000 cubic nanometers.

Related Articles


The device is described in the American Institute of Physics' journal Applied Physics Letters.

Photodetectors based on single quantum dots are expected to find uses in optoelectrical interfaces in future quantum computers, where single photons will carry information over long distances and single electrons will be used for computation.

"Our research team fabricated a very localized light detector with dimensions far below the wavelength of light, which enables detection with very high spatial resolution," explains Val Zwiller of the Kavli Institute of Nanoscience at Delft University of Technology.

"In addition, because quantum dots have discrete energy levels, only light in resonance with the energy levels of the quantum dot will be detected. The indium phosphide (InP) nanowire was grown with standard epitaxial techniques and the quantum dot was obtained by sandwiching a thin segment in between with a lower bandgap. We created the device using electron beam lithography to contact a single nanowire."


Story Source:

The above story is based on materials provided by American Institute of Physics. Note: Materials may be edited for content and length.


Journal Reference:

  1. M. P. van Kouwen, M. H. M. van Weert, M. E. Reimer, N. Akopian, U. Perinetti, R. E. Algra, E. P. A. M. Bakkers, L. P. Kouwenhoven, V. Zwiller. Single quantum dot nanowire photodetectors. Applied Physics Letters, 2010; 97 (11): 113108 DOI: 10.1063/1.3484962

Cite This Page:

American Institute of Physics. "Single quantum dot nanowire photodetectors." ScienceDaily. ScienceDaily, 16 December 2010. <www.sciencedaily.com/releases/2010/12/101214100234.htm>.
American Institute of Physics. (2010, December 16). Single quantum dot nanowire photodetectors. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2010/12/101214100234.htm
American Institute of Physics. "Single quantum dot nanowire photodetectors." ScienceDaily. www.sciencedaily.com/releases/2010/12/101214100234.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Computers & Math News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Smart Glasses Augment Reality to Help Visually Impaired

Smart Glasses Augment Reality to Help Visually Impaired

Reuters - Innovations Video Online (Feb. 1, 2015) New augmented reality smart glasses developed by researchers at Oxford University can help people with visual impairments improve their vision by providing depth-based feedback, allowing users to "see" better. Joel Flynn reports. Video provided by Reuters
Powered by NewsLook.com
Verizon Will Let Users Opt Out Of 'Supercookies'

Verizon Will Let Users Opt Out Of 'Supercookies'

Newsy (Jan. 31, 2015) Verizon says users can remove its ad targeting software from their phones completely. Video provided by Newsy
Powered by NewsLook.com
China's "Great Firewall" Frustrates Internet Users

China's "Great Firewall" Frustrates Internet Users

Reuters - News Video Online (Jan. 31, 2015) The Chinese government moves to tighten regulations for virtual private network (VPN) services that are used to access websites and services normally blocked in China. That&apos;s affected many internet users in the country. Yiming Woo reports. Video provided by Reuters
Powered by NewsLook.com
Google Forced To Obey Law, Changes U.K. Privacy Policy

Google Forced To Obey Law, Changes U.K. Privacy Policy

Newsy (Jan. 30, 2015) Google has agreed to make its privacy policy more transparent in compliance with a U.K. law. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins