Genetic algorithm applied to the optimization of quantum cascade lasers with second harmonic generation

被引:3
作者
Gajic, A. [1 ,2 ]
Radovanovic, J. [1 ]
Milanovic, V. [1 ]
Indjin, D. [3 ]
Ikonic, Z. [3 ]
机构
[1] Univ Belgrade, Sch Elect Engn, Belgrade 11120, Serbia
[2] Telekom Srbija Ad, Belgrade 11000, Serbia
[3] Univ Leeds, Sch Elect & Elect Engn, Leeds LS2 9JT, W Yorkshire, England
关键词
OUTPUT CHARACTERISTICS; TRANSPORT; SCATTERING;
D O I
10.1063/1.4864472
中图分类号
O59 [应用物理学];
学科分类号
摘要
A computational model for the optimization of the second order optical nonlinearities in GaInAs/AlInAs quantum cascade laser structures is presented. The set of structure parameters that lead to improved device performance was obtained through the implementation of the Genetic Algorithm. In the following step, the linear and second harmonic generation power were calculated by self-consistently solving the system of rate equations for carriers and photons. This rate equation system included both stimulated and simultaneous double photon absorption processes that occur between the levels relevant for second harmonic generation, and material-dependent effective mass, as well as band nonparabolicity, were taken into account. The developed method is general, in the sense that it can be applied to any higher order effect, which requires the photon density equation to be included. Specifically, we have addressed the optimization of the active region of a double quantum well In0.53Ga0.47As/A(l0.48)In(0.52)As structure and presented its output characteristics. (C) 2014 AIP Publishing LLC.
引用
收藏
页数:7
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