Optimization Analysis on the Transmission Characteristics of Semi-circle Long-range Dielectric-loaded Surface Plasmon-polariton Waveguides

摘要：

　　Semi-circle long-range dielectric-loaded surface plasmon-polariton waveguide (LR-DLSPPW) is proposed,in which a thin and narrow metal stripe (15-nm-thick and 500-nm-wide) is sandwiched between a semi-circle dielectric ridge(with the refractive index of 1.535,the radius of 777 nm) and a dielectric film (with the refractive index of 1.493) supported by low-index substrate (with the refractive index of 1.34).The mode effective index,propagation length,mode width and figures of merit of the fundamental mode supported using the finite-element method are calculated at the telecom wavelength λ =1.55μm for different dimensions (t) of the dielectric film.It was calculated that the optimized structure have the maximized parameters with figures of merit 3.75×10 6and propagation length 3.7mm at t=570 nm.The semi-circle LR-DLSPPW structure is found to exhibit about 20% increase of the propagation length as compared to the conventional rectangular LR-DLSPPW while ridge thickness t≤600 nm.The proposed configuration allows for easy connection to electrodes enabling,and is technologically simple being compatible with planar fabrication using UV-lithography.

关键词： long-range dielectric-loaded surface Plasmon-polariton waveguide semi-circle figures of merit propagation length

作者: Libin Cheng Xingliang Cheng Zhenling Dou Guanmao Zhang

作者单位: Institute of Modern Communication Technology, School of Information Science & Engineering,Lanzhou University, 222＃ Tianshui Southern Road, Lanzhou, 730000, China

会议类型: 国际会议

会议名称: 中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)

会议地点: 杭州

会议语种:英文

页码: 1-5

在线出版日期: 2012-11-04（万方平台首次上网日期，不代表论文的发表时间）