期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 1, 页码 70-73出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.70
关键词
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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 increases 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 xi and average mode length L-m.
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