组合谐振腔的双波长THz滤波器的研究

组合谐振腔的双波长THz滤波器的研究

内容简介：提出一种新型的光子晶体双波长THz滤波器，该滤波器由正方晶格光子晶体中3个点缺陷优化组合的谐振腔和线缺陷构成，可以实现双波长下载功能。利用 FDTD(有限差分时域)法研究了两束光波在滤波器中的传输特性，仿真计算了对应的透射谱和时域响应图。仿真结果表明，该新型滤波器能够实现单信道双波长滤波功能，并且具有谐振腔品质因子Q值大、滤波带宽窄、损耗低、稳态响应时间快和体积小易于系统集成等优点。

Abstract：This paper proposes a novel photonic crystal-based dual-wavelength THz filter.Consisting of a resonator that is the optimized combination of three point defects in a square lattice photonic crystal and line defects,this resonator can realize dual-wavelength THz downloading function.It investigates the transmission characteristics of two beams of optical wave in the fil-ter,using the Finite-Difference Time-Domain (FDTD)method,and simulates the corresponding transmission spectrum and time domain response graph.Simulation results show that this filter can perform single-channel dual-wavelength filtering func-tions and has such advantages as large quality factorQvalue of a resonator,narrow filtering bandwidth,small loss,fast steady response time,small volume and easy system integration.

作者：戈晓恒, 陈鹤鸣,

关键词：光子晶体, 太赫兹波, 组合谐振腔, 滤波器, 有限差分时域法