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 Light Two Rivers Light The Two Rivers Light (also known as the Two Rivers North Pierhead Light) is a lighthouse formerly located at the harbor entrance to Two Rivers, Wisconsin. It is now located in a museum in the city. This light was preceded by a brick structure on shore, one and a half stories with a cupola. This light was erected in 1852 and lasted only until 1858. A project to improve the harbor was begun in 1870, including the construction in stages of a pair of breakwaters defining the entrance channel. In 1886 a lighthouse was built at the