Semiconductor structures, low-dimensional systems, quantum phenomena

Terahertz electroluminescence of Fibonacci superlattices

K. V. Malyshev

Bauman Moscow State Technical University

Abstract: 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.

Received: 27.06.2012
Accepted: 22.10.2012

 English version: Semiconductors, 2013, 47:7, 947–951

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