Simulation of optical pulse propagation in a two-dimensional photonic crystal waveguide using a high accuracy finite-difference time-domain algorithm
Simulation of optical pulse propagation in a two-dimensional photonic crystal waveguide using a high accuracy finite-difference time-domain algorithm
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DOI：
10.1063/1.1539542
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发表时间：
2003-01
影响因子：
3.2
通讯作者：
S. Yamada;Yutaka Watanabe;Y. Katayama;J. B. Cole;Z. Marka;R. Pasternak;R. G. Albridge;S. Rashkeev-S.
中科院分区：
文献类型：
--
作者：
S. Yamada;Yutaka Watanabe;Y. Katayama;J. B. Cole;Z. Marka;R. Pasternak;R. G. Albridge;S. Rashkeev-S.
使用基于非标准有限差分的高精度时域有限差分（FDTD）算法检查了嵌入直波导结构的二维光子晶体中光脉冲的传播特性。即使对于长度只有 10 个晶胞的光子晶体结构，也发现了可调谐且非常大的群速度色散。详细计算表明，具有嵌入波导的非常小的光子晶体可用于控制脉冲色散，即仅25μm长的波导光子晶体可以将1％的上啁啾脉冲压缩到傅里叶变换极限。此外，我们的 FDTD 计算结果与无限结构上光子能带计算的预测非常吻合。
Propagation properties of optical pulses in a two-dimensional photonic crystal with a straight waveguide structure imbedded were examined using a high accuracy finite-difference time-domain (FDTD) algorithm based on nonstandard finite differences. A tunable and significantly large group velocity dispersion was found even for photonic crystal structures as small as 10 unit cells long. Detailed calculations indicated that a very small photonic crystal with an imbedded waveguide can be used to control pulse dispersion, i.e., a just 25 μm long photonic crystal with waveguide can compress a 1% up-chirped pulse to the Fourier transform limit. Further, our FDTD calculations showed excellent agreement with the prediction of photonic band calculations on infinite structures.