研究目的
Investigating the effect of the thickness and dielectric properties of the waveguide layer material on the temperature dependence of the threshold current of injection lasers based on symmetric separate confinement heterostructures with an expanded waveguide, emitting in the wavelength range of 0.94–1.14 μm.
研究成果
The anomalous behavior of the temperature dependence of the threshold current in lasers based on heteronanostructures is associated with the relatively weak waveguide properties of their active region. Optimizing the thickness and dielectric properties of the waveguide layer material can significantly reduce the temperature dependence of their radiative characteristics.
研究不足
The study is limited to theoretical calculations and does not account for all potential experimental variables such as temperature gradients, higher-order modes, volumetric mechanical stresses, and initial optical inhomogeneities due to imperfections in the growth technology of nanostructures.
1：Experimental Design and Method Selection:
The study involves solving the exact problem of electromagnetic wave propagation in a multilayer heteronanostructure with complex dielectric constant values. The method of modulating functions is used for calculations near critical points where laser generation disruption occurs.
2：Sample Selection and Data Sources:
A quantum-well heteronanostructure based on the AlGaAs/InGaAs/GaAs system is considered, with parameters detailed in Table
3：List of Experimental Equipment and Materials:
The study utilizes theoretical models and calculations without specifying physical equipment.
4：Experimental Procedures and Operational Workflow:
The calculation involves determining the mode gain dependence on the local gain in the active layer and then finding the threshold local gain's temperature dependence.
5：Data Analysis Methods:
The analysis includes optimizing the thickness and dielectric constant of the waveguide layers to improve the temperature dependence of the radiative characteristics.
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