Finite-Difference Time-Domain Simulation of Mid- and Far-Infrared Quantum Cascade Lasers

V. Tamošiūnasa,b, Ž, Kanclerisa, M. Dagysa, R. Simniškisa, M. Tamošsiūnienėa, G. Valušisa, G. Strasserb and K. Unterrainerb aSemiconductor Physics Institute, A. Goštauto 11, 01108 Vilnius, Lithuania bInstitute of Photonics and Center for Micro- and Nanostructures, Vienna University of Technology, 1040 Vienna, Austria

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Received: 22 08 2004;

We present simulations of mid- and far-infrared quantum cascade lasers operating with/without external magnetic field. Maxwell-Bloch solver based on the finite-difference time-domain method was used in our investigation. Reduction of the far-infrared quantum cascade laser emission intensity is associated with increased optical losses in highly doped layers when magnetic field is changed from 4.2 T to 6.2 T. A simulated emission spectrum of mid-infrared disc-shaped quantum cascade laser with 60μm radius is consistent with the experimentally observed irregular spacing between quantum cascade laser emission lines.

DOI: 10.12693/APhysPolA.107.179 PACS numbers:72.30.+q, 78.66.-w, 85.30.De