Abstract
The Quantum cascade laser (QCL) is a compact source of coherent radiation in the terahertz spectral region (FIR). A possible solution for improvement of the maximum operating temperature is use of the InGaAs/InAlAs/InP (referred as InP based) material system instead of GaAs/AlGaAs. This material has a lower electron effective mass that leads to a larger matrix dipole element and larger optical gain for a similar structure.
© 2011 Optical Society of America
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