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Predictive nonequilibrium Green's function simulation of transport in THz quantum cascade lasers

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2 Author(s)
Schmielau, T. ; Mater. & Eng. Res. Inst., Sheffield Hallam Univ., Sheffield, UK ; Pereira, M.F.

Efficient and predictive simulators are an essential tool for design and optimization of quantum cascade lasers (QCLs), since experimental trial and error is a time-consuming and expensive process due to the high complexity involved in the growth and processing of samples. We present a highly efficient implementation of a next-generation QCL simulator based on nonequilibrium Green's functions (NGFs), which are particularly suited for QCL simulation mainly for two reasons: (i) The operation of QCLs sensitively depends on the balance between coherent transport and scattering which NGFs can describe consistently. (ii) NGFs explicitly guarantee energy conservation.

Published in:

Terahertz and Mid Infrared Radiation: Basic Research and Practical Applications, 2009. TERA-MIR 2009. International Workshop

Date of Conference:

Nov. 3 2009-Oct. 6 2009