Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

Nano-Islands Control Response Times

Photonics Spectra
Mar 2003
Nano-Islands Control Response Times By tailoring the distance between layers of optically inactive ErAs nano-islands in a semiconductor matrix, researchers at Max Planck Institut für Festkörperforschung in Stuttgart, Germany, and at the University of California, Santa Barbara, have demonstrated the tunability of the electrical response speed in photoconductive switches. They suggested that the approach, which they described in the February issue of Nature Materials, may enable the use of receiver and terahertz technologies at telecommunications wavelengths.

In one demonstration, the researchers varied the thickness of GaAs layers that separated 1.2 monolayers of self-assembled ErAs islands from 10 to 400 nm, yielding photoconductive switches with electron lifetimes from 190 fs to 17 ps under 800-nm illumination. A subsequent device that featured InGaAs and ErAs in a 40-nm lattice period displayed an electron lifetime of 1.1 ps and should operate under up to 1.55-µm illumination.

Communicationsemiconductor matrixoptically inactive ErAs nano-islandsphotoconductive switchesResearch & Technologyresponse speed

Terms & Conditions Privacy Policy About Us Contact Us
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.