Daniel S. BurgessResearchers at Lumileds Lighting LLC in San Jose, Calif., Sandia National Laboratories in Albuquerque, N.M., and Agilent Technologies in Palo Alto, Calif., have reported improved far-field radiance from electrically operated InGaN/GaN LEDs that feature a photonic crystal structure in the top layer. With the development of a suitable manufacturing process for optimized designs, the work promises blue emitters with much higher extraction efficiencies than currently are available. Jonathan J. 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