Featured Research

from universities, journals, and other organizations

Fully epitaxial microcavities open the door to quantum optoelectronic effects in GaN-based systems

Date:
June 16, 2010
Source:
American Institute of Physics
Summary:
For the very first time, a team of researchers in Germany has introduced quantum dots in fully epitaxial nitride laser structures without the need for hybrid systems -- effectively eliminating the cumbersome method of combining different materials from epitaxy and evaporation. This should help pave the way to a further optimization of lasers and single photon emitters in the visible spectrum region, according to the team.

For the very first time, a team of researchers in Germany has introduced quantum dots in fully epitaxial nitride laser structures without the need for hybrid systems -- effectively eliminating the cumbersome method of combining different materials from epitaxy and evaporation. This should help pave the way to a further optimization of lasers and single photon emitters in the visible spectrum region, according to the team.

A detailed description of their findings appears in the journal Applied Physics Letters, which is published by the American Institute of Physics (AIP).

"Gallium-nitride-based laser diodes are very promising materials for the development of efficient light sources in the UV-blue to green spectral region. They're already in use, for example, in BluRay (high-data-storage disc) players," explains Kathrin Sebald, the optics team's senior postdoctoral researcher from the University of Bremen's Institute of Solid State Physics. "By reducing the size of the optically active material down to the nanometer scale (quantum dots), the efficiency of such devices can be increased much further -- opening the door to the use of quantum optoelectronic effects."

When combined with optical microcavities, the emitted light can be confined to ultra-small volumes by resonant recirculation. In such quantum optical devices, microcavities can coax quantum dots to emit spontaneous photons in a desired direction, which leads to an enormously increased output, Sebald notes. Applications of these devices are as diverse as their properties.


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. Kathrin Sebald et al. Optical properties of InGaN quantum dots in monolithic pillar microcavities. Applied Physics Letters, 2010; (forthcoming) [link]

Cite This Page:

American Institute of Physics. "Fully epitaxial microcavities open the door to quantum optoelectronic effects in GaN-based systems." ScienceDaily. ScienceDaily, 16 June 2010. <www.sciencedaily.com/releases/2010/06/100616090035.htm>.
American Institute of Physics. (2010, June 16). Fully epitaxial microcavities open the door to quantum optoelectronic effects in GaN-based systems. ScienceDaily. Retrieved September 21, 2014 from www.sciencedaily.com/releases/2010/06/100616090035.htm
American Institute of Physics. "Fully epitaxial microcavities open the door to quantum optoelectronic effects in GaN-based systems." ScienceDaily. www.sciencedaily.com/releases/2010/06/100616090035.htm (accessed September 21, 2014).

Share This



More Matter & Energy News

Sunday, September 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

What This MIT Sensor Could Mean For The Future Of Robotics

What This MIT Sensor Could Mean For The Future Of Robotics

Newsy (Sep. 20, 2014) MIT researchers developed a light-based sensor that gives robots 100 times the sensitivity of a human finger, allowing for "unprecedented dexterity." Video provided by Newsy
Powered by NewsLook.com
MIT BioSuit A New Take On Traditional Spacesuits

MIT BioSuit A New Take On Traditional Spacesuits

Newsy (Sep. 19, 2014) The MIT BioSuit could be an alternative to big, bulky traditional spacesuits, but the concept needs some work. Video provided by Newsy
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
Powered by NewsLook.com
Virtual Reality Headsets Unveiled at Tokyo Game Show

Virtual Reality Headsets Unveiled at Tokyo Game Show

AFP (Sep. 18, 2014) Several companies unveiled virtual reality headsets at the Tokyo Game Show, Asia's largest digital entertainment exhibition. Duration: 00:48 Video provided by AFP
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:
from the past week

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