| 摘要 |
PURPOSE:To improve oscillation efficiency, by employing a diamond with specific nitrogen concentration which is synthesized using a temperature difference method, and by irradiating this diamond with neutron thereafter performing heat treatment. CONSTITUTION:A diamond is employed which is so formed using temperature difference method as to have a nitrogen concentration of 1X10<17>-2X10<20>atoms/ cm<2> and a total content of metal atoms comprising Ni, Fe, Co, Mn, Cr, Al, Mo, Ti, V and Hf of 3.5X10<18>atoms/cm<2>. This diamond is irradiated with neutron of 1X10<15>cm<-2>-1X10<18>cm<-2>, and is then treated with heat treatment at temperature of 600-1200 deg.C with pressures below 1torr. Now, preferably the synthetic diamond is of Ib type and has a oscillation wavelength of 650-780nm. Therefore, the diamond light emitting device, in which the distribution of concentration of color center is of uniformity, can be obtained, and the oscillation efficiency thereof can be improved. |
