Hybrid surface plasmon waveguide based on CdS nanowires and metal ridges

• Published in: Optics communications 2019-07, Vol.443, p.255-261
• Main Authors: Li, Wenchao, Bai, Landi, Li, Zhi Quan, Xie, Ruijie, Li, Xin, Yue, Zhong, Gu, Erdan
• Format: Article
• Language: English
• Subjects: CdS; Mode characteristics; Quality factor; Surface plasmon; Transmission length; Waveguide
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2019.02.027

In this study, a novel hybrid surface plasmon waveguide structure based on CdS nanowires and metal ridges was designed. The waveguide structure was simulated and analysed at a working wavelength of 490 nm based on the finite element method. The electric field distribution, mode characteristics, transmission length and quality factor of the waveguide were studied with geometric parameters. Results show that the comprehensive performance of the waveguide can be significantly optimised by appropriately adjusting the geometric parameters of the structure. Through the optimal parameter design, the effective mode field area reaches 0.008 λ2, the transmission length is 21,289 nm, and the quality factor is 702.12. This waveguide structure has great potential in the fields of optoelectronic communication and optical sensing technology. •The comprehensive performance of the waveguide is significantly optimised.•The effective mode field area reaches 0.008 λ2.•The transmission length can be 21289 nm.•The quality factor can reach to 702.12.•The waveguide has great potential in optical communications and optical sensing.