Tuning random lasing in photonic glasses.
Tuning random lasing in photonic glasses.
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DOI：
10.1364/ol.40.001611
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发表时间：
2015-02
期刊：
影响因子：
3.6
通讯作者：
M. Gaio;M. Peruzzo;R. Sapienza
中科院分区：
文献类型：
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作者：
M. Gaio;M. Peruzzo;R. Sapienza
我们提出了一个详细的数值研究扩散随机激光器的可调谐性时，米氏共振激发。我们解决了多模扩散模型和计算多重光散射存在的光学增益，包括散射和增益的色散，没有任何假设的β参数。这使我们能够调查一个现实的光子玻璃制成的乳胶球和罗丹明和量化的激射波长可调谐范围和激射阈值。超出扩散单色模型的预期，当激光模式之间的竞争最强时，而不是当激光波长距离增益曲线的最大值最远时，会发现最高阈值。
We present a detailed numerical investigation of the tunability of a diffusive random laser when Mie resonances are excited. We solve a multimode diffusion model and calculate multiple light scattering in presence of optical gain that includes dispersion in both scattering and gain, without any assumptions about the β parameter. This allows us to investigate a realistic photonic glass made of latex spheres and rhodamine and to quantify both the lasing wavelength tunability range and the lasing threshold. Beyond what is expected by diffusive monochromatic models, the highest threshold is found when the competition between the lasing modes is strongest and not when the lasing wavelength is furthest from the maximum of the gain curve.