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 Dam through it and the impoundment area behind the dam is much drier than the impoundment area behind the northern dam. The city of Roswell suffered devastating floods in 1937, 1941, and 1954. After the 1954 flood, the US Congress passed the Watershed Protection and Flood Prevention Act of 1954 which authorized the Corps of Engineers to build dams to protect Roswell from floods. The dams were completed in 1963. Two Rivers Dam The Two Rivers Dam is a dry dam in southeastern New Mexico, sixteen miles west-southwest of the city of Roswell. The dam is actually two dams separated by