We report on optically pumped green stimulated emissions from regular nanocolumn arrays. Various InGaN-based triangular-lattice nanocolumn arrays with different lattice constants and nanocolumn diameters were prepared on a (0001) GaN/c-sapphire te...
Y. Inose   M. Sakai   K. Ema   A. Kikuchi   K. Kishino   T. Ohtsuki   
2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011 2011年 [査読有り]
The possibility of Anderson localization of light in random dielectric systems has been discussed over the last three decades [1]. However, theoretical and experimental studies for the light localization in random media are much more difficult tha...
2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011 2011年 [査読有り]
In disordered materials, the combination of multiple light scattering and optical interference induces the localization of light. This phenomenon is called Anderson localization which is widely observed in electron systems with random potentials. ...
M. Hashimoto   K. Fukunaga   H. Kunugita   J. Kamimura   A. Kikuchi   K. Kishino   K. Ema   
ULTRAFAST PHENOMENA IN SEMICONDUCTORS AND NANOSTRUCTURE MATERIALS XV 7937 2011年 [査読有り]
The relaxation dynamics of photo-excited carriers of indium nitride (InN) films and nanocolumns were examined using degenerate pump-probe measurements at room temperature. We measured two InN films and nanocolumns with different background carrier...