基于二维光子晶体的多波段太赫兹波4×2编码器  

Multi-band Terahertz 4×2 encoder based on two-dimensional photonic crystal

作　　者：孟旭 李培丽[1] MENG Xu;LI Peili(College of Electronic and Optical Engineering&College of Flexible ElectronicsFuture Technology,Nanjing University of Posts&Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院尧柔性电子(未来技术)学院,南京210023

出　　处：《光通信技术》2024年第4期47-53,共7页Optical Communication Technology

基　　金：国家自然科学基金项目(62175116)资助。

摘　　要：为了扩大编码器的适用波段范围,设计了一种基于二维光子晶体的多波段太赫兹波4×2编码器。利用Rsoft软件结合平面波展开(PWE)法和时域有限差分(FDTD)法对编码器的性能进行了深入的研究和分析。研究结果表明:编码器的输出透过率会随着波导分支处介质柱的横向偏移量的变化而变化;经过优化设计后的太赫兹波4×2编码器能够在103.80~108.57 μm、109.19~111.12 μm以及111.94~114.08 μm波段内实现高对比度的4×2编码逻辑功能,且对比度不低于9.30 dB,最高可达到29.47 dB,响应时间不超过16.04 ps。In order to expand the applicable band range of the encoder,a multi-band Terahertz wave 4×2 encoder based on two-dimensional photonic crystals is designed.The performance of the encoder is thoroughly studied and analyzed using Rsoft software combined with the plane wave expansion(PWE)method and the finite-difference time-domain(FDTD)method.The re-search results indicate that the output transmittance of the encoder varies with the lateral offset of the dielectric pillars at the waveguide branch.After optimizing the design of the Terahertz wave 4×2 encoder,it can achieve high-contrast 4×2 encoding log-ic functions in the wavelength ranges of 103.80~108.57μm,109.19~111.12μm,and 111.94~114.08μm,with a contrast ratio of no less than 9.30 dB and a maximum of 29.47 dB,and a response time is not more than 16.04 ps.

关 键 词：太赫兹技术 编码器 光子晶体 逻辑门 

分 类 号：TN256[电子电信—物理电子学]