Abstract-Terahertz cascades from a nanoparticle

K.B. Arnardottir, T.C.H. Liew

(Submitted on 21 Mar 2017)

http://export.arxiv.org/abs/1703.07119

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.