This article is cited in 3 papers

Lasers

THz laser based on quasi-periodic AlGaAs superlattices

K. V. Malyshev

Bauman Moscow State Technical University

Abstract: The use of quasi-periodic AlGaAs superlattices as an active element of a quantum cascade laser of terahertz range is proposed and theoretically investigated. A multi-colour emission, having from three to six peaks of optical gain, is found in Fibonacci, Thue–Morse, and figurate superlattices in electric fields of intensity F = 11 – 13 kV cm^-1 in the frequency range f = 2 – 4 THz. The peaks depend linearly on the electric field, retain the height of 20 cm^-1, and strongly depend on the thickness of the AlGaAslayers.

Keywords: terahertz technology, quantum cascade laser, quasiperiodic structure, figurate numbers, superlattice.

PACS: 42.55.Px, 62.23.St, 78.67.-n

Received: 08.02.2013
Revised: 26.04.2013

 English version: Quantum Electronics, 2013, 43:6, 503–508

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