Neodymium Photoluminescence in Whispering Gallery Modes of Toroidal   Microcavities
  We report on light emission from high-Q neodymium-implanted silica microtoroids. Following the description of the fabrication process of microtoroids, neodymium light emission is analysed. This emission is coupled to various cavity modes. Using evanescent wave coupling we achieve selective detection of Whispering Gallery Modes of a microtoroid. 
Fedja Orucevic (LKB - Lhomond), Jean Hare (LKB - Lhomond), Val\'erie   Lef\`evre-Seguin (LKB - Lhomond)