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
Aomori (city) Aomori (city) Aomori is located in central Aomori Prefecture, on a plain between the southern end of Aomori Bay, which it faces to the north and the Hakkōda Mountains to the south. Among other smaller rivers, the city has two large rivers flowing through it, the Komagome River and its tributary, the Arakawa River. Like most of Tōhoku, Aomori has a humid temperate climate with hot summers, and cold, though not extreme, winters. The city has a humid continental climate (Köppen "Dfa") using 0 degree isotherm, with monthly averages ranging from in January to in August. Aomori and its surrounding