Diamond

文件类型：PDF文档
文件大小：34K
PROBLEM TO BE SOLVED : To provide a diamond that has high safety and can stably emit fluorescence having visible to near-infrared wavelength regions. SOLUTION : The diamond has a color center, a first rare-earth ion, and a second rare-earth ion different from the first rare-earth ion. In the diamond, a first light is emitted because the energy transfer from the first rare-earth ion excited by light irradiation causes two-photon absorption in the second rare-earth ion, and then a second light is emitted by exciting the color center with the first light. COPYRIGHT : (C)2012, JPO&INPIT