Abstract
The present article provides an overview of developments in nonpolar-oriented GaN-based materials as polarized light emitters over the past 15 years. The strong interest in nonpolar materials emerged around 1996, but nonpolar-oriented light-emitting diodes were not demonstrated until 2004. The later technological key achievement was the commercialization of nonpolar-oriented bulk GaN substrates; it is now feasible to discuss the electronic band structure of such high-quality nonpolar GaN as well as device applications of polarized light emitters. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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