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

Blue Lasers Meet Tough Commercial Requirements

Photonics Spectra
May 1998
Shuji Nakamura, Nichia Chemical Industries

Light-emitting diodes (LEDs) and laser diodes with wavelengths below the red (< 635 nm) hold significant promise for holographic memories, compact discs (CDs) and printers among other devices. As such, much development has gone into the search for blue-emitting diode lasers.
Gallium nitride and other III-V nitride-based semiconductors have a direct band gap that is suitable for blue light-emitting devices. The band gap energy of aluminum gallium indium nitride (AlInGaN) varies between 6.2 and 2.0 eV, depending on its composition at room temperature. Therefore, using these semiconductors, we can fabricate emitters with outputs between the red and UV.

diode lasersFeature ArticlesFeatureslaserslight sourcesLEDs

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

Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!