Terahertz electroluminescence of fibonacci superlattices

The electroluminescence of AlGaAs Fibonacci superlattices in the terahertz range is studied theoretically. Linear behavior of the optical amplification coefficient G and multicolored emission with peaks of G higher than 20 cm−1 without accompanying absorption peaks are observed in electric fields of F = 11–13 kVcm−1 at the frequencies f = 2–4 THz. The parameters of the peaks can be conveniently controlled by varying the electric field and the superlattice layer thicknesses. Such emitters based on quasi-periodic super-lattices offer promise for terahertz technology.