Theoretical Analysis of Pulse Dynamics in Silicon Photonic Crystal Wire Waveguides
Theoretical Analysis of Pulse Dynamics in Silicon Photonic Crystal Wire Waveguides
复制标题
DOI：
10.1109/jstqe.2009.2025392
复制
发表时间：
2010-01
影响因子：
4.9
通讯作者：
N. Panoiu;J. McMillan;C. Wong
中科院分区：
文献类型：
--
作者：
N. Panoiu;J. McMillan;C. Wong
在本文中，我们提出了一个全面的理论描述的光脉冲在1-D波导中的线缺陷的光子晶体（PhC）的平板波导由硅制成。我们将在我们的分析线性光学效应，如群速度色散和光学损耗，以及由克尔非线性的PhC引起的非线性效应。我们还包括在我们的模型中的自由载流子（FC）的色散和FC引起的光损耗，从而研究通过双光子吸收产生的FC脉冲动力学的影响。我们的分析表明，重要的数量，如脉冲群速度，色散系数，或波导非线性系数的强烈影响的周期性的引导结构。最后，我们证明了在慢光模式的情况下，线性和非线性效应都更强，与线性相比，非线性效应被增强得更多。
In this paper, we present a comprehensive theoretical description of the propagation of optical pulses in 1-D waveguides consisting of a line defect in a photonic crystal (PhC) slab waveguide made of silicon. We incorporate in our analysis linear optical effects, such as group-velocity dispersion and optical losses, as well as nonlinear effects induced by the Kerr nonlinearity of the PhC. We also include in our model the free-carrier (FC) dispersion and FC-induced optical losses, and thus study the influence of FCs generated through two-photon absorption on the pulse dynamics. Our analysis reveals that important quantities, such as the pulse group velocity, dispersion coefficients, or the waveguide nonlinear coefficient are strongly affected by the periodic nature of the guiding structure. Finally, we demonstrate that both linear and nonlinear effects are stronger in the case of slow-light modes, with the nonlinear effects being enhanced more as compared to the linear ones.