Author Affiliations
Abstract
1 Key Laboratory for Micro-/Nano- Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China
2 SK Hynix Memory Solutions, 3103 North First Street, San Jose, CA 95134, USA
In this Letter, the effects of material/structure parameters of photonic crystal (PhC) parallel waveguides on the coupling length are investigated. The results show that, increasing the effective relative permittivity of the PhC leads to a downward shift of the photonic bandgap and a variation of the coupling length. A compact PhC 1.31/1.55 μm wavelength division multiplexer (WDM)/demultiplexer with simple structure is proposed, where the output power ratios are more than 24 dB. This WDM can multiplex/demultiplex other light waves efficiently.
130.5296 Photonic crystal waveguides 060.4510 Optical communications 060.4230 Multiplexing Chinese Optics Letters
2018, 16(1): 011301
湖南大学物理与微电子科学学院, 湖南 长沙 410082
光子晶体是以介电常数呈周期性排布且在光波长量级构建的人工微结构,利用其具有光子禁带这一特性可实现对光子的控制。引入线缺陷可形成光子晶体波导。以1.55 μm 的TE 偏振光作为光源，用时域有限差分法计算并分析了二维正方晶格光子晶体三光波导方向耦合器在不同波导间距下的耦合长度及耦合效率分别与介质柱折射率和介质柱半径的变化关系。研究结果为1.55 μm 耦合器的结构设计及制备提供一定的理论指导。
光学器件 光子晶体 耦合器 时域有限差分法 耦合长度 耦合效率
