To further improve the emission efficiency and enhance the output power level of a light-emitting diode (LED), nanorod structures and surface plasmon coupling mechanism have been introduced to LED fabrication. A nanorod LED array has the advantages of higher crystal quality, larger emission volume, non-polar quantum well emission, higher indium incorporation, and stronger light extraction, when compared with a planar LED structure. With the surface plasmon coupling mechanism in an LED, the internal quantum efficiency (IQE) can be increased, particularly for those in the green, yellow, and red ranges of low IQEs. In this presentation, the techniques of regularly patterned nanorod LED array and surface plasmon coupled LED are discussed.
C.C. (Chih-Chung) Yang received his Ph.D. degree in 1984 in electrical engineering from the University of Illinois, Urbana-Champaign. Since 1993, he became a professor in the Institute of Photonics and Optoelectronics, and the Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan. His research areas include the MOCVD and MBE growths of GaN and ZnO-related semiconductors, light-emitting diode, plasmonics, and biophotonics. He is a fellow of SPIE and a fellow of the Optical Society of America.