Mode control of random microresonators consisting of scattering particles
Mode control of random microresonators consisting of scattering particles
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由散射粒子组成的随机微谐振器的模式控制
DOI：
10.1117/12.880941
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Obara
中科院分区：
文献类型：
--
作者：
S. Takeda;S. Hamada;M. Terakawa;M. Obara
研究了随机散射系统中安德森局域光的可调谐性及其激光特性。利用时域有限差分法（FDTD）研究了二维密集介质粒子散射系统的脉冲响应，分析了系统的局域模。我们揭示了能够通过改变系统的结构参数：粒子的直径，填充因子和折射率来调谐的局域模式的频率。还发现能够通过改变整个介质的系统尺寸来调谐局域模的Q（质量）因子。此外，结合麦克斯韦方程和电子系统的速率方程，我们还从理论上证明了局域区是如何作为激光的“谐振腔”而产生随机激光的。
We report on the tuneabilities of Anderson localized light in random scattering systems and its lasing characteristics. By use of FDTD method, we investigated the impulse response of two-dimensional scattering systems consisting of closely packed dielectric particles, and analyzed the localized modes. We revealed the frequencies of the localized modes to be capable of being tuned by changing the structural parameters of the system: diameter, filling factor, and refractive index of the particles. It was also found to be able to tune the Q (quality) factors of the localized modes by changing the system size of the entire medium. Furthermore, by combining Maxwell's equations with rate equations for electron's system, we also theoretically demonstrate how the localized area serves as a laser "resonator" and random lasing is induced.