具有滤波功能的阶梯喇叭口光子晶体波导出射光集束研究  

Study on the beaming of light emitting from stepped horn opening photonic crystal waveguide with filtering function

作　　者：沈正阳 钱依婷 周涛 华昌洲 SHEN Zhengyang;QIAN Yiting;ZHOU Tao;HUA Changzhou(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo,Zhejiang 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《光电子.激光》2025年第4期337-343,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(62271273);宁波市自然科学基金(2022J097)资助项目。

摘　　要：光子晶体(photonic crystal,PC)器件的研究领域中,缺乏对多功能器件的研究。本文提出了一种具有滤波功能的二维正方晶格光子晶体波导出射光集束结构。该结构出射端口呈阶梯喇叭型,通过辐射波与其接触喇叭口表面所生成表面波之间的干涉,增强光的集束性,大幅增加有效传播距离。在喇叭口的前端则另有两个耦合滤波器,分别滤除中心波长为1.505μm和1.516μm的窄带波段,滤波效率达到了99.64%和99.02%。通过以上两部分结构的设计,该结构对非1.505μm和1.516μm这两个窄带范围的入射光具有很强的集束能力。由时域有限差分法分析可得,该结构在入射波长为1.460μm时,有效传播距离达到了111.4μm。In the research field of photonic crystal(PC)devices,there is a lack of research on multifunctional devices.This article proposes a two-dimensional square lattice photonic crystal wave guide structure of beaming of light emitting with filtering function.The output port of this structure is in a stepped horn shape,through the interference between the radiation wave and the surface wave generated by the contact horn surface,the light beaming is enhanced,and the effective propagation distance is greatly increased.In addition,there are two coupled filters at the front end of the horn opening,respectively filtering the center wavelength of 1.505μm and 1.516μm narrow band,filtering efficiency reaching 99.64%and 99.02%.Through the structural design of the above two parts,when the wavelength of the incident light is not in the narrow band range of 1.505μm and 1.516μm,the induced beaming of light emitting will be greatly enhanced.According to the finite-difference time-domain analysis,the effective propagation distance of the structure reaches 111.4μm when the input wavelength is 1.460μm.

关 键 词：光子晶体(PC)波导 出射光集束 滤波器 时域有限差分法 

分 类 号：TN256[电子电信—物理电子学]