光学学报, 2012, 32 (1): 0123004, 网络出版: 2011-11-21
基于硅纳米线波导的两级光子晶体缩束器
Two-Stage Photonic Crystal Beam Compressor Based on Silicon Nanowire Waveguide
摘要
鉴于在微观领域光波的缩束对实现光电集成的重要意义,提出了基于硅纳米线波导的两级光子晶体缩束器。其中一级压缩基于W5型和W1型光子晶体波导间的高效耦合。二级压缩则由宽为0.1 μm,长为3.06 μm的纳米线波导和W1型光子晶体波导构成,通过二者的高效耦合实现光束压缩。当W1型光子晶体波导和纳米线波导间介质柱的半径为0.04 μm时,对于1550 nm波长的电磁波,缩束器的通光效率可达93.4%,压缩比为16.08,出射光束半峰全宽仅为0.148 μm。
Abstract
Considering the significant value of the compression of the light beam for all optic networks and future integrated photonic/optical circuit, a beam compressor with two-stage compressions based on the efficient coupling between photonic crystal waveguides and nanowire waveguide is proposed. The first stage compression relies on the coupling between W1 and W5 photonic crystal waveguides. A nanowire waveguide with a width of 0.1 μm and a length of 3.06 μm is introduced to realize the second stage compression. The parameter of the rod located between the W1 photonic crystal waveguide and nanowire waveguide is optimized. When the radius of the rodis 0.04 μm, transmission efficiency and full-width at half-maximum (FWHM) of the output beam of the beam compressor are 93.4% and 0.148 μm, respectively. The compression ratio reaches to 16.08.
崔乃迪, 梁静秋, 梁中翥, 王维彪. 基于硅纳米线波导的两级光子晶体缩束器[J]. 光学学报, 2012, 32(1): 0123004. Cui Naidi, Liang Jingqiu, Liang Zhongzhu, Wang Weibiao. Two-Stage Photonic Crystal Beam Compressor Based on Silicon Nanowire Waveguide[J]. Acta Optica Sinica, 2012, 32(1): 0123004.