Greetings I am not a physicist myself, so please forgive me, if my question/proposition will sound naif. I noticed some articles about accelerating electrons using laser and glass gratings: http://phys.org/news/2013-09-chip.html http://phys.org/news/2013-10-particles-compact-particle.html I was wondering, could the same method of acceleration be used to accelerate nuclei of Deuterium or Tritium to the D-T target at the end of such "optical accelerator", with sufficient energy for nuclear fusion to take place (which is above 100 keV, if I understand correctly)? If such acceleration of nuclei could be fine tuned to consume as little energy as possible, could we achieve fusion with positive net energy gain? I suppose such "warm" fusion would not heat the bombarded target to millions of Kelvin, but this is good so, this would prevent the device from destruction. If target could be heated enough to boil the water or to drive the thermoelectric generator, that would be enough. We could then mass-produce such "optical accelerators" (which can be, if I understand correctly, just ten centimeters long) and join them into arrays to produce enough heat/electricity for practical use. This is my idea. Do you think it is theoretically and practically feasible? Thank you for your answers.