Α spiral nanoslit and the higher order plasmonic vortex generation. (8th May 2020)

• Record Type: Journal Article
• Authors: Lu, Xiaoqing; Han, Yuansheng; Lv, Haoran; Mou, Zhen; Zhou, Changda; Wang, Shuyun; Teng, Shuyun
• Is Part Of: Nanotechnology. Volume 31:Number 30(2020)
• Publication Date: 2020-05-08
• Subjects: plasmonic vortex -- nanostructure -- surface plasmons -- theory and design; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab8595
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: In view of the conciseness of a spiral nanoslit and the limited order of the generated vortex, a kind of nanometer spiral, named α spirals, is proposed to generate a higher order plasmonic vortex. Theoretical analysis provides the basis for the advancement of an α spiral. The proposed spiral can generate the plasmonic vortex and the extreme order of the generated vortex depends on parameter α . The numerical simulations express the valid region of the plasmonic vortex generated by the α spiral. Discussions about the validity range of the α spiral nanoslit and the influence of the film material are beneficial to generate a high order vortex. This work builds a platform for the generation of the higher order plasmonic vortex using the simple spiral nanostructure and it can extend the potential applications of higher order plasmonic vortices.