In this letter we propose a new system capable of THz radiation with quantum efficiency above unity. The system consists of nanoparticles where the material composition varies along the radial direction of each nanoparticle in such a way that a ladder of equidistant energy levels emerges. By then exciting the highest level of this ladder we produce multiple photons of the same frequency in the THz range.
Sunday, March 26, 2017
Abstract-Terahertz cascades from a nanoparticle
(Submitted on 21 Mar 2017)