TY - JOUR
T1 - A generalized modeling strategy of quantum-cascade structures with resonance-enhanced harmonic oscillations
AU - Bai, Jing
PY - 2009/3
Y1 - 2009/3
N2 - In this work, the modeling strategy of quantum-cascade lasers is generalized to including the harmonic-resonance-enhanced nonlinear oscillations up to the third order. In addition to the lasing power at fundamental frequency, the second-harmonic and third-harmonic output power can all be evaluated through the model. The model is built on the rate-equations for subband electrons and photons, in connection with Maxwell wave equations for propagation coupling between different emission modes. Various radiative and nonradiative carrier scattering mechanisms are accounted in the model. In addition to single-photon processes, multi-photon processes in the nonlinear cascades are also accounted. The model is based on a full cascade structure containing the injector, active region, and collector in order to account for the nonideal injection efficiency between periodic stages of quantum-cascade lasers. The simulation results on two fabricated quantum-cascade structures capable of nonlinearly harmonic generations agree well with the experiment measurements. The model can be used to evaluate and further optimize the nonlinear performances of quantum-cascade lasers.
AB - In this work, the modeling strategy of quantum-cascade lasers is generalized to including the harmonic-resonance-enhanced nonlinear oscillations up to the third order. In addition to the lasing power at fundamental frequency, the second-harmonic and third-harmonic output power can all be evaluated through the model. The model is built on the rate-equations for subband electrons and photons, in connection with Maxwell wave equations for propagation coupling between different emission modes. Various radiative and nonradiative carrier scattering mechanisms are accounted in the model. In addition to single-photon processes, multi-photon processes in the nonlinear cascades are also accounted. The model is based on a full cascade structure containing the injector, active region, and collector in order to account for the nonideal injection efficiency between periodic stages of quantum-cascade lasers. The simulation results on two fabricated quantum-cascade structures capable of nonlinearly harmonic generations agree well with the experiment measurements. The model can be used to evaluate and further optimize the nonlinear performances of quantum-cascade lasers.
KW - Nonlinear effects
KW - Quantum-cascade lasers
KW - Second-harmonic generation
KW - Third-harmonic generation
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U2 - 10.1016/j.physe.2009.01.001
DO - 10.1016/j.physe.2009.01.001
M3 - Article
AN - SCOPUS:61649097003
SN - 1386-9477
VL - 41
SP - 843
EP - 847
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 5
ER -