Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
share
Email Facebook Twitter Google+ LinkedIn Comments

Mid-IR LEDs Suggest Scene-Generation Applications

Photonics Spectra
Sep 2005
Scientists at the US Army Research Laboratory in Adelphi, working with Maxion Technology of Hyattsville, both in Maryland, have reported wall-plug efficiencies of up to 2.8 percent from 3.8-µm interband cascade LEDs at 77 K. The emitters have potential applications in the generation of simulated infrared environments for tests that incorporate military hardware, as well as in the development of IR countermeasures and of chemical and biological sensors.

In the work, the investigators compared the performance of type-II devices that featured various numbers of active/injection layers and square mesa sizes and that varied in postgrowth processing. They found that thinning the substrate improved output intensity by up to six times, and that the incorporation of a surface grating in the design boosted output by at least another 10 percent.


Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!