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Time Dependent Theory for Random Lasers

Xunya Jiang·C. M. Soukoulis
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Abstract

A model to simulate the phenomenon of random lasing is presented. It couples Maxwell's equations with the rate equations of electronic population in a disordered system. Finite difference time domain methods are used to obtain the field pattern and the spectra of localized lasing modes inside the system. A critical pumping rate $P_{r}^{c}$ exists for the appearance of the lasing peaks. The number of lasing modes increase with the pumping rate and the length of the system. There is a lasing mode repulsion. This property leads to a saturation of the number of modes for a given size system and a relation between the localization length $ξ$ and average mode length $L_m$.

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Xunya Jiang, C. M. Soukoulis. 2000-02-24. Time Dependent Theory for Random Lasers. https://doi.org/10.1103/physrevlett.85.70

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