基于模式干涉的高对比度太赫兹波半加器  

High contrast Terahertz wave half adder based on mode interference

作　　者：孟旭 李培丽[1] MENG Xu;LI Peili(College of Electronic and Optical Engineering&College of Flexible Electronics(Future 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、柔性电子(未来技术)学院,南京210023

出　　处：《光通信技术》2025年第1期113-118,共6页Optical Communication Technology

摘　　要：为了提升半加器的对比度,提出了一种基于模式干涉的高对比度太赫兹波半加器设计方案,该方案在完整的二维正方晶格碲介质柱光子晶体中引入线性波导,以实现逻辑运算功能。通过结合Rsoft软件中的平面波展开法(PWM)与时域有限差分法(FDTD),对半加器进行了全面的性能分析,并针对入射波导位置及介质柱偏移量进行了优化。仿真结果表明:所设计的半加器能够在2.85 THz波段上执行两输入半加逻辑运算;半加器的求和端和进位端对比度分别达到21.37 dB和5.96 dB,总体响应时间为25.2 ps,理论上可以达到39.68 Gb/s的数据传输速率。同时,半加器的结构简单紧凑,尺寸仅为0.84 mm×0.72 mm。In order to improve the contrast of the half adder,a high contrast Terahertz wave half adder design scheme based on mode interference is proposed.In this scheme,a linear waveguide is introduced into the complete two-dimensional square lattice tellurium dielectric pillar photonic crystal,and the logic operation function is realized.A comprehensive performance analysis of the half adder is conducted by combining the plane wave expansion method(PWM)and the finite difference time-domain method(FDTD)in Rsoft software,and optimization is carried out for the position of the incident waveguide and the offset of the dielectric column.The simulation results show that the designed half adder can perform two input half adder logic operations in the 2.85 THz band.The contrast between the sum end and carry end of the half adder can reach 21.37 dB and 5.96 dB,respectively,with an overall response time of 25.2 ps.Theoretically,it can achieve a data transmission rate of 39.68 Gb/s.The structure of the half adder is simple and compact,with a size of only 0.84 mm×0.72 mm.

关 键 词：太赫兹技术 半加器 光子晶体 逻辑门 

分 类 号：TN256[电子电信—物理电子学]