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
Shizuka Arakawa for the ISU Grand Prix Final, where she finished fourth. She later placed third at the Japanese Nationals, marking her fifth medal from this meet, with two golds and two silvers from previous seasons. In 2004, she won the World Championships in Dortmund, Germany, after landing seven clean triple jumps. She was the third Japanese woman to win this title after Midori Ito who won in 1989 and Yuka Sato in 1994. Arakawa had planned to retire after the 2004 World Championships, but her victory there convinced her to change her plans. At the 2005 World Championships, Arakawa finished 9th,