Yasuhiko Arakawa Yasuhiko Arakawa Yasuhiko Arakawa (Japanese , "Arakawa Yasuhiko"; born 6 November 1952) is a Japanese physicist. His research focuses on semiconductor physics, including growth of nanostructures and their optoelectronic applications. Among his main achievements are the proposal of the concept of quantum dots and their application to quantum dot lasers, the observation of exciton-polariton Rabi-splitting in a semiconductor microcavity, or, recently, the first 3D photonic crystal nanocavity lasers with quantum dot gain. Yasuhiko Arakawa received a B.S. degree in 1975 and a Ph.D. degree in 1980, respectively, from the University of Tokyo, both in Electronics Engineering. In 1981 he became
Two Rivers (Red River of the North tributary) Badger, and flows west to the North Branch. It passes the town of Greenbush before entering Kittson County and passing the town of Lake Bronson. At Hallock, the Middle Branch enters from the east. The section of the South Branch downstream from the Middle Branch is shown on federal topographic maps as the main stem of Two Rivers. Two Rivers (Red River of the North tributary) The Two Rivers is a river in Kittson County, northwestern Minnesota, in the United States. Formed by the North Branch of the Two Rivers and the South Branch of the Two Rivers, it is