光学学报, 2012, 32 (2): 0223001, 网络出版: 2012-01-12
并联谐振腔光子晶体单通道侧面耦合波导
Photonic Crystal Single Channel Side-Coupled Waveguide with Parallel Resonators
摘要
分析了多光子晶体谐振腔的并联耦合模理论,并根据该理论设计了单通道光子晶体侧面耦合波导以实现光子晶体器件与光源间的高效耦合。理论研究表明并联谐振腔的耦合效率与谐振腔数量、间距以及品质因子相关。经优化耦合面积和耦合效率,最终选择了5个谐振腔并联作为单通道侧面耦合波导的耦合部分。通过设置谐振腔间距改变其对称性,从而实现侧面耦合波导的单通道传播。在1.55 μm工作波长下,单通道侧面耦合波导的耦合效率可达94.49%。
Abstract
The coupled mode theory of parallel photonic crystal resonators is analyzed, based on which, a side-coupled waveguide to achieve the efficient coupling between photonic crystal devices and the light source is proposed. The theory analysis indicates that the coupling efficiency is sensitive to the total number, the interval and the quality factors of the resonators. By the optimization of the coupling efficiency and the coupling region, five parallel resonators are selected to construct the coupling part of the single channel side-coupled waveguide. Single channel propagation of the side coupled waveguide is realized through changing the interval of the resonators. The single channel side-coupled waveguide achieves the coupling efficiency of 94.49% at the wavelength of 1.55 μm.
崔乃迪, 梁静秋, 梁中翥, 王维彪. 并联谐振腔光子晶体单通道侧面耦合波导[J]. 光学学报, 2012, 32(2): 0223001. Cui Naidi, Liang Jingqiu, Liang Zhongzhu, Wang Weibiao. Photonic Crystal Single Channel Side-Coupled Waveguide with Parallel Resonators[J]. Acta Optica Sinica, 2012, 32(2): 0223001.