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To: riposte who wrote (1860)	2/5/2000 5:24:00 PM
From: Gus	Read Replies (1) \| Respond to of 10714

This is odd. Shuji Nakamura is the well-respected breakthrough scientist who pioneered much of the blue, green, and white LEDs and the early blue laser work at Nichia, the maverick Japanese company. I wonder why this 2/4/2000 news article indicates that he is still with Nichia when this 1/10/2000 press release confirms that he left to accept a research and teaching position at the University of Santa Barbara, located just across the Channel Islands. All of Nakamura's dazzling innovations--the blue, green and white LEDs and the blue laser--depend on the use of the semiconducting material gallium nitride. Current research developments based on the material seem to herald a semiconductor revolution in which gallium nitride is replacing gallium arsenide as the material of choice. Though gallium is common to both materials, it is the move from its combination with arsenic to combination with nitrogen that is key. The latter unlike the former is environmentally friendly. engr.ucsb.edu Note that Nichia's diode and laser work continues to be based primarily on gallium arsenide and sapphire while much of the cutting-edge work on this side of the Pacific involves gallium nitride and silicon carbide.